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Hydrograph River at a Glance Download
Boston Harbor at Boston Tide Height (ft)Observed: 3.48 ft at 9:36AM Aug 17, 2019Observed: 3.66 ft at 9:42AM Aug 17, 2019Observed: 3.84 ft at 9:48AM Aug 17, 2019Observed: 4.02 ft at 9:54AM Aug 17, 2019Observed: 4.21 ft at 10:00AM Aug 17, 2019Observed: 4.4 ft at 10:06AM Aug 17, 2019Observed: 4.59 ft at 10:12AM Aug 17, 2019Observed: 4.77 ft at 10:18AM Aug 17, 2019Observed: 4.97 ft at 10:24AM Aug 17, 2019Observed: 5.19 ft at 10:30AM Aug 17, 2019Observed: 5.39 ft at 10:36AM Aug 17, 2019Observed: 5.62 ft at 10:42AM Aug 17, 2019Observed: 5.82 ft at 10:48AM Aug 17, 2019Observed: 6.01 ft at 10:54AM Aug 17, 2019Observed: 6.28 ft at 11:00AM Aug 17, 2019Observed: 6.47 ft at 11:06AM Aug 17, 2019Observed: 6.71 ft at 11:12AM Aug 17, 2019Observed: 6.9 ft at 11:18AM Aug 17, 2019Observed: 7.12 ft at 11:24AM Aug 17, 2019Observed: 7.31 ft at 11:30AM Aug 17, 2019Observed: 7.52 ft at 11:36AM Aug 17, 2019Observed: 7.74 ft at 11:42AM Aug 17, 2019Observed: 7.92 ft at 11:48AM Aug 17, 2019Observed: 8.09 ft at 11:54AM Aug 17, 2019Observed: 8.28 ft at 12:00PM Aug 17, 2019Observed: 8.43 ft at 12:06PM Aug 17, 2019Observed: 8.59 ft at 12:12PM Aug 17, 2019Observed: 8.72 ft at 12:18PM Aug 17, 2019Observed: 8.83 ft at 12:24PM Aug 17, 2019Observed: 8.92 ft at 12:30PM Aug 17, 2019Observed: 9.04 ft at 12:36PM Aug 17, 2019Observed: 9.13 ft at 12:42PM Aug 17, 2019Observed: 9.25 ft at 12:48PM Aug 17, 2019Observed: 9.27 ft at 12:54PM Aug 17, 2019Observed: 9.39 ft at 1:00PM Aug 17, 2019Observed: 9.47 ft at 1:06PM Aug 17, 2019Observed: 9.57 ft at 1:12PM Aug 17, 2019Observed: 9.59 ft at 1:18PM Aug 17, 2019Observed: 9.68 ft at 1:24PM Aug 17, 2019Observed: 9.69 ft at 1:30PM Aug 17, 2019Observed: 9.73 ft at 1:36PM Aug 17, 2019Observed: 9.69 ft at 1:42PM Aug 17, 2019Observed: 9.68 ft at 1:48PM Aug 17, 2019Observed: 9.65 ft at 1:54PM Aug 17, 2019Observed: 9.6 ft at 2:00PM Aug 17, 2019Observed: 9.54 ft at 2:06PM Aug 17, 2019Observed: 9.5 ft at 2:12PM Aug 17, 2019Observed: 9.42 ft at 2:18PM Aug 17, 2019Observed: 9.34 ft at 2:24PM Aug 17, 2019Observed: 9.22 ft at 2:30PM Aug 17, 2019Observed: 9.13 ft at 2:36PM Aug 17, 2019Observed: 9.02 ft at 2:42PM Aug 17, 2019Observed: 8.88 ft at 2:48PM Aug 17, 2019Observed: 8.7 ft at 2:54PM Aug 17, 2019Observed: 8.56 ft at 3:00PM Aug 17, 2019Observed: 8.11 ft at 3:18PM Aug 17, 2019Observed: 7.98 ft at 3:24PM Aug 17, 2019Observed: 7.81 ft at 3:30PM Aug 17, 2019Observed: 7.68 ft at 3:36PM Aug 17, 2019Observed: 7.5 ft at 3:42PM Aug 17, 2019Observed: 7.34 ft at 3:48PM Aug 17, 2019Observed: 7.15 ft at 3:54PM Aug 17, 2019Observed: 6.96 ft at 4:00PM Aug 17, 2019Observed: 6.77 ft at 4:06PM Aug 17, 2019Observed: 6.59 ft at 4:12PM Aug 17, 2019Observed: 6.38 ft at 4:18PM Aug 17, 2019Observed: 6.2 ft at 4:24PM Aug 17, 2019Observed: 5.99 ft at 4:30PM Aug 17, 2019Observed: 5.8 ft at 4:36PM Aug 17, 2019Observed: 5.58 ft at 4:42PM Aug 17, 2019Observed: 5.36 ft at 4:48PM Aug 17, 2019Observed: 5.15 ft at 4:54PM Aug 17, 2019Observed: 4.98 ft at 5:00PM Aug 17, 2019Observed: 4.76 ft at 5:06PM Aug 17, 2019Observed: 4.52 ft at 5:12PM Aug 17, 2019Observed: 4.32 ft at 5:18PM Aug 17, 2019Observed: 4.13 ft at 5:24PM Aug 17, 2019Observed: 3.93 ft at 5:30PM Aug 17, 2019Observed: 3.79 ft at 5:36PM Aug 17, 2019Observed: 3.59 ft at 5:42PM Aug 17, 2019Observed: 3.34 ft at 5:48PM Aug 17, 2019Observed: 3.16 ft at 5:54PM Aug 17, 2019Observed: 2.99 ft at 6:00PM Aug 17, 2019Observed: 2.83 ft at 6:06PM Aug 17, 2019Observed: 2.65 ft at 6:12PM Aug 17, 2019Observed: 2.5 ft at 6:18PM Aug 17, 2019Observed: 2.37 ft at 6:24PM Aug 17, 2019Observed: 2.22 ft at 6:30PM Aug 17, 2019Observed: 2.12 ft at 6:36PM Aug 17, 2019Observed: 1.99 ft at 6:42PM Aug 17, 2019Observed: 1.88 ft at 6:48PM Aug 17, 2019Observed: 1.8 ft at 6:54PM Aug 17, 2019Observed: 1.73 ft at 7:00PM Aug 17, 2019Observed: 1.65 ft at 7:06PM Aug 17, 2019Observed: 1.6 ft at 7:12PM Aug 17, 2019Observed: 1.54 ft at 7:18PM Aug 17, 2019Observed: 1.49 ft at 7:24PM Aug 17, 2019Observed: 1.43 ft at 7:30PM Aug 17, 2019Observed: 1.45 ft at 7:36PM Aug 17, 2019Observed: 1.48 ft at 7:42PM Aug 17, 2019Observed: 1.5 ft at 7:54PM Aug 17, 2019Observed: 1.59 ft at 8:00PM Aug 17, 2019Observed: 1.72 ft at 8:06PM Aug 17, 2019Observed: 1.83 ft at 8:12PM Aug 17, 2019Observed: 1.93 ft at 8:18PM Aug 17, 2019Observed: 2.04 ft at 8:24PM Aug 17, 2019Observed: 2.18 ft at 8:30PM Aug 17, 2019Observed: 2.33 ft at 8:36PM Aug 17, 2019Observed: 2.49 ft at 8:42PM Aug 17, 2019Observed: 2.61 ft at 8:48PM Aug 17, 2019Observed: 2.75 ft at 8:54PM Aug 17, 2019Observed: 2.91 ft at 9:00PM Aug 17, 2019Observed: 3.06 ft at 9:06PM Aug 17, 2019Observed: 3.22 ft at 9:12PM Aug 17, 2019Observed: 3.37 ft at 9:18PM Aug 17, 2019Observed: 3.52 ft at 9:24PM Aug 17, 2019Observed: 3.67 ft at 9:30PM Aug 17, 2019Observed: 3.87 ft at 9:36PM Aug 17, 2019Observed: 4.07 ft at 9:42PM Aug 17, 2019Observed: 4.28 ft at 9:48PM Aug 17, 2019Observed: 4.46 ft at 9:54PM Aug 17, 2019Observed: 4.69 ft at 10:00PM Aug 17, 2019Observed: 4.92 ft at 10:06PM Aug 17, 2019Observed: 5.14 ft at 10:12PM Aug 17, 2019Observed: 5.38 ft at 10:18PM Aug 17, 2019Observed: 5.55 ft at 10:24PM Aug 17, 2019Observed: 5.73 ft at 10:30PM Aug 17, 2019Observed: 5.91 ft at 10:36PM Aug 17, 2019Observed: 6.14 ft at 10:42PM Aug 17, 2019Observed: 6.29 ft at 10:48PM Aug 17, 2019Observed: 6.49 ft at 10:54PM Aug 17, 2019Observed: 6.68 ft at 11:00PM Aug 17, 2019Observed: 6.89 ft at 11:06PM Aug 17, 2019Observed: 7.09 ft at 11:12PM Aug 17, 2019Observed: 7.31 ft at 11:18PM Aug 17, 2019Observed: 7.51 ft at 11:24PM Aug 17, 2019Observed: 7.72 ft at 11:30PM Aug 17, 2019Observed: 7.9 ft at 11:36PM Aug 17, 2019Observed: 8.1 ft at 11:42PM Aug 17, 2019Observed: 8.25 ft at 11:48PM Aug 17, 2019Observed: 8.46 ft at 11:54PM Aug 17, 2019Observed: 8.65 ft at 12:00AM Aug 18, 2019Observed: 8.85 ft at 12:06AM Aug 18, 2019Observed: 9.02 ft at 12:12AM Aug 18, 2019Observed: 9.21 ft at 12:18AM Aug 18, 2019Observed: 9.36 ft at 12:24AM Aug 18, 2019Observed: 9.53 ft at 12:30AM Aug 18, 2019Observed: 9.68 ft at 12:36AM Aug 18, 2019Observed: 9.81 ft at 12:42AM Aug 18, 2019Observed: 9.92 ft at 12:48AM Aug 18, 2019Observed: 9.98 ft at 12:54AM Aug 18, 2019Observed: 10.1 ft at 1:00AM Aug 18, 2019Observed: 10.2 ft at 1:06AM Aug 18, 2019Observed: 10.28 ft at 1:12AM Aug 18, 2019Observed: 10.31 ft at 1:18AM Aug 18, 2019Observed: 10.33 ft at 1:24AM Aug 18, 2019Observed: 10.32 ft at 1:30AM Aug 18, 2019Highest Observation: 10.34 ft at 1:36AM Aug 18, 2019Observed: 10.31 ft at 1:42AM Aug 18, 2019Highest Observation: 10.34 ft at 1:48AM Aug 18, 2019Observed: 10.31 ft at 1:54AM Aug 18, 2019Observed: 10.27 ft at 2:00AM Aug 18, 2019Observed: 10.24 ft at 2:06AM Aug 18, 2019Observed: 10.19 ft at 2:12AM Aug 18, 2019Observed: 10.14 ft at 2:18AM Aug 18, 2019Observed: 10.06 ft at 2:24AM Aug 18, 2019Observed: 9.99 ft at 2:30AM Aug 18, 2019Observed: 9.9 ft at 2:36AM Aug 18, 2019Observed: 9.83 ft at 2:42AM Aug 18, 2019Observed: 9.72 ft at 2:48AM Aug 18, 2019Observed: 9.62 ft at 2:54AM Aug 18, 2019Observed: 9.48 ft at 3:00AM Aug 18, 2019Observed: 9.36 ft at 3:06AM Aug 18, 2019Observed: 9.23 ft at 3:12AM Aug 18, 2019Observed: 9.03 ft at 3:18AM Aug 18, 2019Observed: 8.84 ft at 3:24AM Aug 18, 2019Observed: 8.67 ft at 3:30AM Aug 18, 2019Observed: 8.47 ft at 3:36AM Aug 18, 2019Observed: 8.29 ft at 3:42AM Aug 18, 2019Observed: 8.1 ft at 3:48AM Aug 18, 2019Observed: 7.9 ft at 3:54AM Aug 18, 2019Observed: 7.72 ft at 4:00AM Aug 18, 2019Observed: 7.54 ft at 4:06AM Aug 18, 2019Observed: 7.36 ft at 4:12AM Aug 18, 2019Observed: 7.18 ft at 4:18AM Aug 18, 2019Observed: 6.98 ft at 4:24AM Aug 18, 2019Observed: 6.77 ft at 4:30AM Aug 18, 2019Observed: 6.57 ft at 4:36AM Aug 18, 2019Observed: 6.39 ft at 4:42AM Aug 18, 2019Observed: 6.17 ft at 4:48AM Aug 18, 2019Observed: 5.97 ft at 4:54AM Aug 18, 2019Observed: 5.75 ft at 5:00AM Aug 18, 2019Observed: 5.52 ft at 5:06AM Aug 18, 2019Observed: 5.29 ft at 5:12AM Aug 18, 2019Observed: 5.07 ft at 5:18AM Aug 18, 2019Observed: 4.82 ft at 5:24AM Aug 18, 2019Observed: 4.56 ft at 5:30AM Aug 18, 2019Observed: 4.33 ft at 5:36AM Aug 18, 2019Observed: 4.11 ft at 5:42AM Aug 18, 2019Observed: 3.91 ft at 5:48AM Aug 18, 2019Observed: 3.69 ft at 5:54AM Aug 18, 2019Observed: 3.52 ft at 6:00AM Aug 18, 2019Observed: 3.33 ft at 6:06AM Aug 18, 2019Observed: 3.14 ft at 6:12AM Aug 18, 2019Observed: 2.96 ft at 6:18AM Aug 18, 2019Observed: 2.79 ft at 6:24AM Aug 18, 2019Observed: 2.6 ft at 6:30AM Aug 18, 2019Observed: 2.38 ft at 6:36AM Aug 18, 2019Observed: 2.19 ft at 6:42AM Aug 18, 2019Observed: 1.99 ft at 6:48AM Aug 18, 2019Observed: 1.83 ft at 6:54AM Aug 18, 2019Observed: 1.67 ft at 7:00AM Aug 18, 2019Observed: 1.54 ft at 7:06AM Aug 18, 2019Observed: 1.41 ft at 7:12AM Aug 18, 2019Observed: 1.29 ft at 7:18AM Aug 18, 2019Observed: 1.22 ft at 7:24AM Aug 18, 2019Observed: 1.15 ft at 7:30AM Aug 18, 2019Observed: 1.09 ft at 7:36AM Aug 18, 2019Observed: 1.02 ft at 7:42AM Aug 18, 2019Observed: 0.94 ft at 7:48AM Aug 18, 2019Observed: 0.89 ft at 7:54AM Aug 18, 2019Observed: 0.86 ft at 8:00AM Aug 18, 2019Observed: 0.85 ft at 8:06AM Aug 18, 2019Observed: 0.88 ft at 8:12AM Aug 18, 2019Observed: 0.92 ft at 8:18AM Aug 18, 2019Observed: 0.96 ft at 8:24AM Aug 18, 2019Observed: 1.03 ft at 8:30AM Aug 18, 2019Observed: 1.14 ft at 8:36AM Aug 18, 2019Observed: 1.24 ft at 8:42AM Aug 18, 2019Observed: 1.34 ft at 8:48AM Aug 18, 2019Observed: 1.48 ft at 8:54AM Aug 18, 2019Observed: 1.63 ft at 9:00AM Aug 18, 2019Observed: 1.79 ft at 9:06AM Aug 18, 2019Observed: 1.95 ft at 9:12AM Aug 18, 2019Observed: 2.12 ft at 9:18AM Aug 18, 2019Observed: 2.29 ft at 9:24AM Aug 18, 2019Observed: 2.44 ft at 9:30AM Aug 18, 2019Observed: 2.6 ft at 9:36AM Aug 18, 2019Observed: 2.77 ft at 9:42AM Aug 18, 2019Observed: 2.94 ft at 9:48AM Aug 18, 2019Observed: 3.09 ft at 9:54AM Aug 18, 2019Observed: 3.23 ft at 10:00AM Aug 18, 2019Observed: 3.38 ft at 10:06AM Aug 18, 2019Observed: 3.54 ft at 10:12AM Aug 18, 2019Observed: 3.74 ft at 10:18AM Aug 18, 2019Observed: 3.93 ft at 10:24AM Aug 18, 2019Observed: 4.12 ft at 10:30AM Aug 18, 2019Observed: 4.31 ft at 10:36AM Aug 18, 2019Observed: 4.5 ft at 10:42AM Aug 18, 2019Observed: 4.66 ft at 10:48AM Aug 18, 2019Observed: 4.86 ft at 10:54AM Aug 18, 2019Observed: 5.05 ft at 11:00AM Aug 18, 2019Observed: 5.23 ft at 11:06AM Aug 18, 2019Observed: 5.4 ft at 11:12AM Aug 18, 2019Observed: 5.61 ft at 11:18AM Aug 18, 2019Observed: 5.84 ft at 11:24AM Aug 18, 2019Observed: 6.05 ft at 11:30AM Aug 18, 2019Observed: 6.29 ft at 11:36AM Aug 18, 2019Observed: 6.48 ft at 11:42AM Aug 18, 2019Observed: 6.71 ft at 11:48AM Aug 18, 2019Observed: 6.94 ft at 11:54AM Aug 18, 2019Observed: 7.16 ft at 12:00PM Aug 18, 2019Observed: 7.33 ft at 12:06PM Aug 18, 2019Observed: 7.52 ft at 12:12PM Aug 18, 2019Observed: 7.72 ft at 12:18PM Aug 18, 2019Observed: 7.88 ft at 12:24PM Aug 18, 2019Observed: 8.04 ft at 12:30PM Aug 18, 2019Observed: 8.19 ft at 12:36PM Aug 18, 2019Observed: 8.33 ft at 12:42PM Aug 18, 2019Observed: 8.51 ft at 12:48PM Aug 18, 2019Observed: 8.67 ft at 12:54PM Aug 18, 2019Observed: 8.8 ft at 1:00PM Aug 18, 2019Observed: 8.97 ft at 1:06PM Aug 18, 2019Observed: 9.1 ft at 1:12PM Aug 18, 2019Observed: 9.2 ft at 1:18PM Aug 18, 2019Observed: 9.29 ft at 1:24PM Aug 18, 2019Observed: 9.39 ft at 1:30PM Aug 18, 2019Observed: 9.47 ft at 1:36PM Aug 18, 2019Observed: 9.56 ft at 1:42PM Aug 18, 2019Observed: 9.61 ft at 1:48PM Aug 18, 2019Observed: 9.68 ft at 1:54PM Aug 18, 2019Observed: 9.75 ft at 2:00PM Aug 18, 2019Observed: 9.77 ft at 2:06PM Aug 18, 2019Observed: 9.81 ft at 2:12PM Aug 18, 2019Observed: 9.8 ft at 2:18PM Aug 18, 2019Observed: 9.77 ft at 2:24PM Aug 18, 2019Observed: 9.73 ft at 2:30PM Aug 18, 2019Observed: 9.64 ft at 2:36PM Aug 18, 2019Observed: 9.57 ft at 2:42PM Aug 18, 2019Observed: 9.48 ft at 2:48PM Aug 18, 2019Observed: 9.38 ft at 2:54PM Aug 18, 2019Observed: 9.3 ft at 3:00PM Aug 18, 2019Observed: 9.21 ft at 3:06PM Aug 18, 2019Observed: 9.12 ft at 3:12PM Aug 18, 2019Observed: 9.01 ft at 3:18PM Aug 18, 2019Observed: 8.87 ft at 3:24PM Aug 18, 2019Observed: 8.74 ft at 3:30PM Aug 18, 2019Observed: 8.6 ft at 3:36PM Aug 18, 2019Observed: 8.46 ft at 3:42PM Aug 18, 2019Observed: 8.33 ft at 3:48PM Aug 18, 2019Observed: 8.19 ft at 3:54PM Aug 18, 2019Observed: 8.07 ft at 4:00PM Aug 18, 2019Observed: 7.94 ft at 4:06PM Aug 18, 2019Observed: 7.81 ft at 4:12PM Aug 18, 2019Observed: 7.61 ft at 4:18PM Aug 18, 2019Observed: 7.43 ft at 4:24PM Aug 18, 2019Observed: 7.25 ft at 4:30PM Aug 18, 2019Observed: 7.05 ft at 4:36PM Aug 18, 2019Observed: 6.88 ft at 4:42PM Aug 18, 2019Observed: 6.67 ft at 4:48PM Aug 18, 2019Observed: 6.5 ft at 4:54PM Aug 18, 2019Observed: 6.32 ft at 5:00PM Aug 18, 2019Observed: 6.14 ft at 5:06PM Aug 18, 2019Observed: 5.94 ft at 5:12PM Aug 18, 2019Observed: 5.72 ft at 5:18PM Aug 18, 2019Observed: 5.46 ft at 5:24PM Aug 18, 2019Observed: 5.24 ft at 5:30PM Aug 18, 2019Observed: 5.06 ft at 5:36PM Aug 18, 2019Observed: 4.83 ft at 5:42PM Aug 18, 2019Observed: 4.61 ft at 5:48PM Aug 18, 2019Observed: 4.42 ft at 5:54PM Aug 18, 2019Observed: 4.27 ft at 6:00PM Aug 18, 2019Observed: 4.1 ft at 6:06PM Aug 18, 2019Observed: 3.92 ft at 6:12PM Aug 18, 2019Observed: 3.74 ft at 6:18PM Aug 18, 2019Observed: 3.52 ft at 6:24PM Aug 18, 2019Observed: 3.32 ft at 6:30PM Aug 18, 2019Observed: 3.18 ft at 6:36PM Aug 18, 2019Observed: 3.02 ft at 6:42PM Aug 18, 2019Observed: 2.84 ft at 6:48PM Aug 18, 2019Observed: 2.68 ft at 6:54PM Aug 18, 2019Observed: 2.53 ft at 7:00PM Aug 18, 2019Observed: 2.37 ft at 7:06PM Aug 18, 2019Observed: 2.25 ft at 7:12PM Aug 18, 2019Observed: 2.16 ft at 7:18PM Aug 18, 2019Observed: 2.06 ft at 7:24PM Aug 18, 2019Observed: 1.91 ft at 7:30PM Aug 18, 2019Observed: 1.83 ft at 7:36PM Aug 18, 2019Observed: 1.75 ft at 7:42PM Aug 18, 2019Observed: 1.68 ft at 7:48PM Aug 18, 2019Observed: 1.61 ft at 7:54PM Aug 18, 2019Observed: 1.56 ft at 8:00PM Aug 18, 2019Observed: 1.52 ft at 8:06PM Aug 18, 2019Observed: 1.5 ft at 8:12PM Aug 18, 2019Observed: 1.49 ft at 8:18PM Aug 18, 2019Observed: 1.53 ft at 8:24PM Aug 18, 2019Observed: 1.57 ft at 8:30PM Aug 18, 2019Observed: 1.63 ft at 8:36PM Aug 18, 2019Observed: 1.72 ft at 8:42PM Aug 18, 2019Observed: 1.83 ft at 8:48PM Aug 18, 2019Observed: 1.95 ft at 8:54PM Aug 18, 2019Observed: 2.09 ft at 9:00PM Aug 18, 2019Observed: 2.22 ft at 9:06PM Aug 18, 2019Observed: 2.39 ft at 9:12PM Aug 18, 2019Observed: 2.54 ft at 9:18PM Aug 18, 2019Observed: 2.68 ft at 9:24PM Aug 18, 2019Observed: 2.82 ft at 9:30PM Aug 18, 2019Observed: 2.96 ft at 9:36PM Aug 18, 2019Observed: 3.11 ft at 9:42PM Aug 18, 2019Observed: 3.23 ft at 9:48PM Aug 18, 2019Observed: 3.38 ft at 9:54PM Aug 18, 2019Observed: 3.51 ft at 10:00PM Aug 18, 2019Observed: 3.67 ft at 10:06PM Aug 18, 2019Observed: 3.84 ft at 10:12PM Aug 18, 2019Observed: 4.02 ft at 10:18PM Aug 18, 2019Observed: 4.2 ft at 10:24PM Aug 18, 2019Observed: 4.38 ft at 10:30PM Aug 18, 2019Observed: 4.57 ft at 10:36PM Aug 18, 2019Observed: 4.75 ft at 10:42PM Aug 18, 2019Observed: 4.96 ft at 10:48PM Aug 18, 2019Observed: 5.15 ft at 10:54PM Aug 18, 2019Observed: 5.35 ft at 11:00PM Aug 18, 2019Observed: 5.52 ft at 11:06PM Aug 18, 2019Observed: 5.73 ft at 11:12PM Aug 18, 2019Observed: 5.95 ft at 11:18PM Aug 18, 2019Observed: 6.15 ft at 11:24PM Aug 18, 2019Observed: 6.35 ft at 11:30PM Aug 18, 2019Observed: 6.52 ft at 11:36PM Aug 18, 2019Observed: 6.69 ft at 11:42PM Aug 18, 2019Observed: 6.9 ft at 11:48PM Aug 18, 2019Observed: 7.12 ft at 11:54PM Aug 18, 2019Observed: 7.32 ft at 12:00AM Aug 19, 2019Observed: 7.52 ft at 12:06AM Aug 19, 2019Observed: 7.72 ft at 12:12AM Aug 19, 2019Observed: 7.93 ft at 12:18AM Aug 19, 2019Observed: 8.15 ft at 12:24AM Aug 19, 2019Observed: 8.35 ft at 12:30AM Aug 19, 2019Observed: 8.53 ft at 12:36AM Aug 19, 2019Observed: 8.68 ft at 12:42AM Aug 19, 2019Observed: 8.82 ft at 12:48AM Aug 19, 2019Observed: 9.01 ft at 12:54AM Aug 19, 2019Observed: 9.18 ft at 1:00AM Aug 19, 2019Observed: 9.32 ft at 1:06AM Aug 19, 2019Observed: 9.45 ft at 1:12AM Aug 19, 2019Observed: 9.56 ft at 1:18AM Aug 19, 2019Observed: 9.67 ft at 1:24AM Aug 19, 2019Observed: 9.79 ft at 1:30AM Aug 19, 2019Observed: 9.9 ft at 1:36AM Aug 19, 2019Observed: 9.99 ft at 1:42AM Aug 19, 2019Observed: 10.07 ft at 1:48AM Aug 19, 2019Observed: 10.15 ft at 1:54AM Aug 19, 2019Observed: 10.19 ft at 2:00AM Aug 19, 2019Observed: 10.26 ft at 2:06AM Aug 19, 2019Observed: 10.27 ft at 2:12AM Aug 19, 2019Observed: 10.28 ft at 2:18AM Aug 19, 2019Observed: 10.27 ft at 2:24AM Aug 19, 2019Observed: 10.25 ft at 2:30AM Aug 19, 2019Observed: 10.21 ft at 2:36AM Aug 19, 2019Observed: 10.15 ft at 2:42AM Aug 19, 2019Observed: 10.11 ft at 2:48AM Aug 19, 2019Observed: 10.06 ft at 2:54AM Aug 19, 2019Observed: 9.98 ft at 3:00AM Aug 19, 2019Observed: 9.89 ft at 3:06AM Aug 19, 2019Observed: 9.78 ft at 3:12AM Aug 19, 2019Observed: 9.68 ft at 3:18AM Aug 19, 2019Observed: 9.54 ft at 3:24AM Aug 19, 2019Observed: 9.4 ft at 3:30AM Aug 19, 2019Observed: 9.24 ft at 3:36AM Aug 19, 2019Observed: 9.08 ft at 3:42AM Aug 19, 2019Observed: 8.93 ft at 3:48AM Aug 19, 2019Observed: 8.78 ft at 3:54AM Aug 19, 2019Observed: 8.65 ft at 4:00AM Aug 19, 2019Observed: 8.48 ft at 4:06AM Aug 19, 2019Observed: 8.33 ft at 4:12AM Aug 19, 2019Observed: 8.19 ft at 4:18AM Aug 19, 2019Observed: 8.03 ft at 4:24AM Aug 19, 2019Observed: 7.88 ft at 4:30AM Aug 19, 2019Observed: 7.69 ft at 4:36AM Aug 19, 2019Observed: 7.48 ft at 4:42AM Aug 19, 2019Observed: 7.28 ft at 4:48AM Aug 19, 2019Observed: 7.07 ft at 4:54AM Aug 19, 2019Observed: 6.9 ft at 5:00AM Aug 19, 2019Observed: 6.72 ft at 5:06AM Aug 19, 2019Observed: 6.51 ft at 5:12AM Aug 19, 2019Observed: 6.31 ft at 5:18AM Aug 19, 2019Observed: 6.09 ft at 5:24AM Aug 19, 2019Observed: 5.89 ft at 5:30AM Aug 19, 2019Observed: 5.7 ft at 5:36AM Aug 19, 2019Observed: 5.48 ft at 5:42AM Aug 19, 2019Observed: 5.2 ft at 5:48AM Aug 19, 2019Observed: 4.96 ft at 5:54AM Aug 19, 2019Observed: 4.8 ft at 6:00AM Aug 19, 2019Observed: 4.58 ft at 6:06AM Aug 19, 2019Observed: 4.39 ft at 6:12AM Aug 19, 2019Observed: 4.21 ft at 6:18AM Aug 19, 2019Observed: 4 ft at 6:24AM Aug 19, 2019Observed: 3.75 ft at 6:30AM Aug 19, 2019Observed: 3.55 ft at 6:36AM Aug 19, 2019Observed: 3.36 ft at 6:42AM Aug 19, 2019Observed: 3.15 ft at 6:48AM Aug 19, 2019Observed: 2.89 ft at 6:54AM Aug 19, 2019Observed: 2.71 ft at 7:00AM Aug 19, 2019Observed: 2.56 ft at 7:06AM Aug 19, 2019Observed: 2.39 ft at 7:12AM Aug 19, 2019Observed: 2.23 ft at 7:18AM Aug 19, 2019Observed: 2.08 ft at 7:24AM Aug 19, 2019Observed: 1.94 ft at 7:30AM Aug 19, 2019Observed: 1.81 ft at 7:36AM Aug 19, 2019Observed: 1.67 ft at 7:42AM Aug 19, 2019Observed: 1.57 ft at 7:48AM Aug 19, 2019Observed: 1.44 ft at 7:54AM Aug 19, 2019Observed: 1.36 ft at 8:00AM Aug 19, 2019Observed: 1.24 ft at 8:06AM Aug 19, 2019Observed: 1.17 ft at 8:12AM Aug 19, 2019Observed: 1.11 ft at 8:18AM Aug 19, 2019Observed: 1.07 ft at 8:24AM Aug 19, 2019Observed: 1.05 ft at 8:30AM Aug 19, 2019Observed: 1.09 ft at 8:36AM Aug 19, 2019Observed: 1.12 ft at 8:42AM Aug 19, 2019Observed: 1.13 ft at 8:48AM Aug 19, 2019Observed: 1.2 ft at 8:54AM Aug 19, 2019Observed: 1.31 ft at 9:00AM Aug 19, 2019Observed: 1.41 ft at 9:06AM Aug 19, 2019Observed: 1.49 ft at 9:12AM Aug 19, 2019Observed: 1.59 ft at 9:18AM Aug 19, 2019Observed: 1.72 ft at 9:24AM Aug 19, 2019Observed: 1.85 ft at 9:30AM Aug 19, 2019Observed: 1.95 ft at 9:36AM Aug 19, 2019Observed: 2.05 ft at 9:42AM Aug 19, 2019Observed: 2.2 ft at 9:48AM Aug 19, 2019Observed: 2.32 ft at 9:54AM Aug 19, 2019Observed: 2.46 ft at 10:00AM Aug 19, 2019Observed: 2.59 ft at 10:06AM Aug 19, 2019Observed: 2.74 ft at 10:12AM Aug 19, 2019Observed: 2.92 ft at 10:18AM Aug 19, 2019Observed: 3.09 ft at 10:24AM Aug 19, 2019Observed: 3.28 ft at 10:30AM Aug 19, 2019Observed: 3.49 ft at 10:36AM Aug 19, 2019Observed: 3.71 ft at 10:42AM Aug 19, 2019Observed: 3.89 ft at 10:48AM Aug 19, 2019Observed: 4.08 ft at 10:54AM Aug 19, 2019Observed: 4.26 ft at 11:00AM Aug 19, 2019Observed: 4.44 ft at 11:06AM Aug 19, 2019Observed: 4.59 ft at 11:12AM Aug 19, 2019Observed: 4.76 ft at 11:18AM Aug 19, 2019Observed: 4.93 ft at 11:24AM Aug 19, 2019Observed: 5.13 ft at 11:30AM Aug 19, 2019Observed: 5.33 ft at 11:36AM Aug 19, 2019Observed: 5.54 ft at 11:42AM Aug 19, 2019Observed: 5.72 ft at 11:48AM Aug 19, 2019Observed: 5.92 ft at 11:54AM Aug 19, 2019Observed: 6.13 ft at 12:00PM Aug 19, 2019Observed: 6.32 ft at 12:06PM Aug 19, 2019Observed: 6.49 ft at 12:12PM Aug 19, 2019Observed: 6.67 ft at 12:18PM Aug 19, 2019Observed: 6.88 ft at 12:24PM Aug 19, 2019Observed: 7.07 ft at 12:30PM Aug 19, 2019Observed: 7.32 ft at 12:36PM Aug 19, 2019Observed: 7.53 ft at 12:42PM Aug 19, 2019Observed: 7.74 ft at 12:48PM Aug 19, 2019Observed: 7.91 ft at 12:54PM Aug 19, 2019Observed: 8.09 ft at 1:00PM Aug 19, 2019Observed: 8.28 ft at 1:06PM Aug 19, 2019Observed: 8.45 ft at 1:12PM Aug 19, 2019Observed: 8.6 ft at 1:18PM Aug 19, 2019Observed: 8.76 ft at 1:24PM Aug 19, 2019Observed: 8.88 ft at 1:30PM Aug 19, 2019Observed: 9.01 ft at 1:36PM Aug 19, 2019Observed: 9.15 ft at 1:42PM Aug 19, 2019Observed: 9.26 ft at 1:48PM Aug 19, 2019Observed: 9.38 ft at 1:54PM Aug 19, 2019Observed: 9.48 ft at 2:00PM Aug 19, 2019Observed: 9.51 ft at 2:06PM Aug 19, 2019Observed: 9.59 ft at 2:12PM Aug 19, 2019Observed: 9.65 ft at 2:18PM Aug 19, 2019Observed: 9.72 ft at 2:24PM Aug 19, 2019Observed: 9.73 ft at 2:30PM Aug 19, 2019Observed: 9.79 ft at 2:36PM Aug 19, 2019Observed: 9.79 ft at 2:42PM Aug 19, 2019Observed: 9.77 ft at 2:48PM Aug 19, 2019Observed: 9.77 ft at 2:54PM Aug 19, 2019Observed: 9.74 ft at 3:00PM Aug 19, 2019Observed: 9.67 ft at 3:06PM Aug 19, 2019Observed: 9.64 ft at 3:12PM Aug 19, 2019Observed: 9.56 ft at 3:18PM Aug 19, 2019Observed: 9.58 ft at 3:24PM Aug 19, 2019Observed: 9.49 ft at 3:30PM Aug 19, 2019Observed: 9.45 ft at 3:36PM Aug 19, 2019Observed: 8.71 ft at 4:12PM Aug 19, 2019Observed: 8.54 ft at 4:18PM Aug 19, 2019Observed: 8.42 ft at 4:24PM Aug 19, 2019Observed: 8.25 ft at 4:30PM Aug 19, 2019Observed: 8.1 ft at 4:36PM Aug 19, 2019Observed: 7.9 ft at 4:42PM Aug 19, 2019Observed: 7.74 ft at 4:48PM Aug 19, 2019Observed: 7.52 ft at 4:54PM Aug 19, 2019Observed: 7.32 ft at 5:00PM Aug 19, 2019Observed: 7.12 ft at 5:06PM Aug 19, 2019Observed: 6.98 ft at 5:12PM Aug 19, 2019Observed: 6.79 ft at 5:18PM Aug 19, 2019Observed: 6.6 ft at 5:24PM Aug 19, 2019Observed: 6.46 ft at 5:30PM Aug 19, 2019Observed: 6.26 ft at 5:36PM Aug 19, 2019Observed: 6.08 ft at 5:42PM Aug 19, 2019Observed: 5.89 ft at 5:48PM Aug 19, 2019Observed: 5.72 ft at 5:54PM Aug 19, 2019Observed: 5.5 ft at 6:00PM Aug 19, 2019Observed: 5.29 ft at 6:06PM Aug 19, 2019Observed: 5.04 ft at 6:12PM Aug 19, 2019Observed: 4.84 ft at 6:18PM Aug 19, 2019Observed: 4.68 ft at 6:24PM Aug 19, 2019Observed: 4.52 ft at 6:30PM Aug 19, 2019Observed: 4.33 ft at 6:36PM Aug 19, 2019Observed: 4.14 ft at 6:42PM Aug 19, 2019Observed: 3.95 ft at 6:48PM Aug 19, 2019Observed: 3.74 ft at 6:54PM Aug 19, 2019Observed: 3.56 ft at 7:00PM Aug 19, 2019Observed: 3.38 ft at 7:06PM Aug 19, 2019Observed: 3.15 ft at 7:12PM Aug 19, 2019Observed: 2.95 ft at 7:18PM Aug 19, 2019Observed: 2.76 ft at 7:24PM Aug 19, 2019Observed: 2.6 ft at 7:30PM Aug 19, 2019Observed: 2.48 ft at 7:36PM Aug 19, 2019Observed: 2.35 ft at 7:42PM Aug 19, 2019Observed: 2.23 ft at 7:48PM Aug 19, 2019Observed: 2.12 ft at 7:54PM Aug 19, 2019Observed: 1.99 ft at 8:00PM Aug 19, 2019Observed: 1.91 ft at 8:06PM Aug 19, 2019Observed: 1.83 ft at 8:12PM Aug 19, 2019Observed: 1.75 ft at 8:18PM Aug 19, 2019Observed: 1.69 ft at 8:24PM Aug 19, 2019Observed: 1.65 ft at 8:30PM Aug 19, 2019Observed: 1.63 ft at 8:36PM Aug 19, 2019Observed: 1.59 ft at 8:42PM Aug 19, 2019Observed: 1.58 ft at 8:48PM Aug 19, 2019Observed: 1.59 ft at 8:54PM Aug 19, 2019Observed: 1.62 ft at 9:00PM Aug 19, 2019Observed: 1.66 ft at 9:06PM Aug 19, 2019Observed: 1.71 ft at 9:12PM Aug 19, 2019Observed: 1.77 ft at 9:18PM Aug 19, 2019Observed: 1.82 ft at 9:24PM Aug 19, 2019Observed: 1.92 ft at 9:30PM Aug 19, 2019Observed: 2.03 ft at 9:36PM Aug 19, 2019Observed: 2.16 ft at 9:42PM Aug 19, 2019Observed: 2.28 ft at 9:48PM Aug 19, 2019Observed: 2.42 ft at 9:54PM Aug 19, 2019Observed: 2.58 ft at 10:00PM Aug 19, 2019Observed: 2.74 ft at 10:06PM Aug 19, 2019Observed: 2.88 ft at 10:12PM Aug 19, 2019Observed: 3.05 ft at 10:18PM Aug 19, 2019Observed: 3.2 ft at 10:24PM Aug 19, 2019Observed: 3.35 ft at 10:30PM Aug 19, 2019Observed: 3.49 ft at 10:36PM Aug 19, 2019Observed: 3.65 ft at 10:42PM Aug 19, 2019Observed: 3.81 ft at 10:48PM Aug 19, 2019Observed: 3.96 ft at 10:54PM Aug 19, 2019Observed: 4.1 ft at 11:00PM Aug 19, 2019Observed: 4.27 ft at 11:06PM Aug 19, 2019Observed: 4.44 ft at 11:12PM Aug 19, 2019Observed: 4.58 ft at 11:18PM Aug 19, 2019Observed: 4.77 ft at 11:24PM Aug 19, 2019Observed: 4.97 ft at 11:30PM Aug 19, 2019Observed: 5.16 ft at 11:36PM Aug 19, 2019Observed: 5.36 ft at 11:42PM Aug 19, 2019Observed: 5.58 ft at 11:48PM Aug 19, 2019Observed: 5.78 ft at 11:54PM Aug 19, 2019Observed: 5.98 ft at 12:00AM Aug 20, 2019Observed: 6.19 ft at 12:06AM Aug 20, 2019Observed: 6.4 ft at 12:12AM Aug 20, 2019Observed: 6.57 ft at 12:18AM Aug 20, 2019Observed: 6.74 ft at 12:24AM Aug 20, 2019Observed: 6.92 ft at 12:30AM Aug 20, 2019Observed: 7.06 ft at 12:36AM Aug 20, 2019Observed: 7.23 ft at 12:42AM Aug 20, 2019Observed: 7.42 ft at 12:48AM Aug 20, 2019Observed: 7.61 ft at 12:54AM Aug 20, 2019Observed: 7.78 ft at 1:00AM Aug 20, 2019Observed: 7.95 ft at 1:06AM Aug 20, 2019Observed: 8.14 ft at 1:12AM Aug 20, 2019Observed: 8.34 ft at 1:18AM Aug 20, 2019Observed: 8.5 ft at 1:24AM Aug 20, 2019Observed: 8.65 ft at 1:30AM Aug 20, 2019Observed: 8.79 ft at 1:36AM Aug 20, 2019Observed: 8.9 ft at 1:42AM Aug 20, 2019Observed: 9.03 ft at 1:48AM Aug 20, 2019Observed: 9.13 ft at 1:54AM Aug 20, 2019Observed: 9.24 ft at 2:00AM Aug 20, 2019Observed: 9.35 ft at 2:06AM Aug 20, 2019Observed: 9.45 ft at 2:12AM Aug 20, 2019Observed: 9.57 ft at 2:18AM Aug 20, 2019Observed: 9.66 ft at 2:24AM Aug 20, 2019Observed: 9.76 ft at 2:30AM Aug 20, 2019Observed: 9.84 ft at 2:36AM Aug 20, 2019Observed: 9.87 ft at 2:42AM Aug 20, 2019Observed: 9.89 ft at 2:48AM Aug 20, 2019Observed: 9.91 ft at 2:54AM Aug 20, 2019Observed: 9.88 ft at 3:00AM Aug 20, 2019Observed: 9.85 ft at 3:06AM Aug 20, 2019Observed: 9.82 ft at 3:12AM Aug 20, 2019Observed: 9.78 ft at 3:18AM Aug 20, 2019Observed: 9.72 ft at 3:24AM Aug 20, 2019Observed: 9.65 ft at 3:30AM Aug 20, 2019Observed: 9.58 ft at 3:36AM Aug 20, 2019Observed: 9.5 ft at 3:42AM Aug 20, 2019Observed: 9.4 ft at 3:48AM Aug 20, 2019Observed: 9.3 ft at 3:54AM Aug 20, 2019Observed: 9.17 ft at 4:00AM Aug 20, 2019Observed: 9.05 ft at 4:06AM Aug 20, 2019Observed: 8.93 ft at 4:12AM Aug 20, 2019Observed: 8.8 ft at 4:18AM Aug 20, 2019Observed: 8.68 ft at 4:24AM Aug 20, 2019Observed: 8.55 ft at 4:30AM Aug 20, 2019Observed: 8.41 ft at 4:36AM Aug 20, 2019Observed: 8.26 ft at 4:42AM Aug 20, 2019Observed: 8.13 ft at 4:48AM Aug 20, 2019Observed: 7.97 ft at 4:54AM Aug 20, 2019Observed: 7.8 ft at 5:00AM Aug 20, 2019Observed: 7.61 ft at 5:06AM Aug 20, 2019Observed: 7.41 ft at 5:12AM Aug 20, 2019Observed: 7.24 ft at 5:18AM Aug 20, 2019Observed: 7.07 ft at 5:24AM Aug 20, 2019Observed: 6.86 ft at 5:30AM Aug 20, 2019Observed: 6.68 ft at 5:36AM Aug 20, 2019Observed: 6.48 ft at 5:42AM Aug 20, 2019Observed: 6.28 ft at 5:48AM Aug 20, 2019Observed: 6.08 ft at 5:54AM Aug 20, 2019Observed: 5.87 ft at 6:00AM Aug 20, 2019Observed: 5.66 ft at 6:06AM Aug 20, 2019Observed: 5.46 ft at 6:12AM Aug 20, 2019Observed: 5.24 ft at 6:18AM Aug 20, 2019Observed: 5.06 ft at 6:24AM Aug 20, 2019Observed: 4.87 ft at 6:30AM Aug 20, 2019Observed: 4.65 ft at 6:36AM Aug 20, 2019Observed: 4.48 ft at 6:42AM Aug 20, 2019Observed: 4.27 ft at 6:48AM Aug 20, 2019Observed: 4.07 ft at 6:54AM Aug 20, 2019Observed: 3.87 ft at 7:00AM Aug 20, 2019Observed: 3.65 ft at 7:06AM Aug 20, 2019Observed: 3.41 ft at 7:12AM Aug 20, 2019Observed: 3.22 ft at 7:18AM Aug 20, 2019Observed: 3.06 ft at 7:24AM Aug 20, 2019Observed: 2.86 ft at 7:30AM Aug 20, 2019Observed: 2.64 ft at 7:36AM Aug 20, 2019Observed: 2.48 ft at 7:42AM Aug 20, 2019Observed: 2.34 ft at 7:48AM Aug 20, 2019Observed: 2.17 ft at 7:54AM Aug 20, 2019Observed: 2.01 ft at 8:00AM Aug 20, 2019Observed: 1.87 ft at 8:06AM Aug 20, 2019Observed: 1.74 ft at 8:12AM Aug 20, 2019Observed: 1.58 ft at 8:18AM Aug 20, 2019Observed: 1.46 ft at 8:24AM Aug 20, 2019Observed: 1.39 ft at 8:30AM Aug 20, 2019Observed: 1.32 ft at 8:36AM Aug 20, 2019Observed: 1.24 ft at 8:42AM Aug 20, 2019Observed: 1.19 ft at 8:48AM Aug 20, 2019Observed: 1.16 ft at 8:54AM Aug 20, 2019Observed: 1.15 ft at 9:00AM Aug 20, 2019NOAA Center for Operational Oceanographic Products and ServicesBHBM3(plotting HMIRG) Graph Created (9:30AM Aug 20, 2019)ObservedLatest observed value: 1.15 ft at 9:00 AM EDT 20-Aug-2019. Flood Stage is 12.5 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: During times when the area is under a Tropical Storm/Hurricane Watch or Warning, the storm tide or total water level forecast will reflect a plausible worst case scenario (versus the usual most likely scenario). Please refer here for additional storm surge information.

NOTE: Coastal flood impacts are dependent upon waves as well as tide level. High waves can result in flooding even if the tide level is below flood stage.

NOTE: Forecasts for the Boston Harbor at Boston are issued routinely year-round.

Vertical Datum references a tidal datum...for more information see Tides and Currents .

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Flood Categories (in feet)
Major Flood Stage: 16
Moderate Flood Stage: 14.5
Flood Stage: 12.5
Action Stage: 11.5
Low Stage (in feet): -9999

Historic Crests
(1) 15.16 ft on 01/04/2018
(2) 15.10 ft on 02/07/1978
(3) 14.67 ft on 03/02/2018
(4) 14.20 ft on 01/02/1987
(5) 14.14 ft on 10/30/1991
(6) 14.04 ft on 01/24/1979
(7) 14.03 ft on 12/12/1992
(8) 13.87 ft on 03/03/2018
(9) 13.84 ft on 12/29/1959
(10) 13.84 ft on 01/03/2014
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 12.90 ft on 03/22/2019
(2) 13.10 ft on 01/20/2019
(3) 13.05 ft on 11/25/2018
(4) 12.54 ft on 09/10/2018
(5) 13.87 ft on 03/03/2018
(6) 14.67 ft on 03/02/2018
(7) 13.24 ft on 01/30/2018
(8) 15.16 ft on 01/04/2018
(9) 13.10 ft on 05/28/2017
(10) 13.41 ft on 05/26/2017
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.
Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
 Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
16 This is a degree of flooding rarely seen. Major widespread coastal flooding is expected. Numerous homes and roadways will be flooded from Revere and Winthrop southward thru Hull, including major flooding within the Boston Seaport District. Impacts will occur during several hours before and after high tide. People living in vulnerable coastal areas must take action to protect life and property.
14.5 Significant flooding of low lying coastal locations is expected from Revere and Winthrop southward through Hull. This includes significant flooding within the Seaport District of Boston. Numerous homes will be flooded. Road closures and evacuations of coastal sections are likely. Large swells and wave action will produce significant beach erosion.
14 Flooding of low lying coastal locations is expected from Revere and Winthrop southward through Hull. Road closures and some evacuations of coastal sections may be required. Large swells and wave action will produce minor to moderate beach erosion.
13.5 Minor flooding of low lying coastal locations is expected from Revere and Winthrop southward through Hull. The combination of high tides and large swells will result in washover onto coastal roadways and some road closures may occur around the time of high tide.
12.5 Minor coastal flooding occurs along Morrissey Boulevard in Boston.
Photos
(1) Boston Harbor Tidal Station
About This Location Collapse

Latitude: 42.353900° N, Longitude: 71.050300° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 12.5 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)		 Elevation
(gauge height = flood stage)		 Elevation information source
NAVD88 -5.51 6.99 Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL -5.21 7.29 Older USGS topographic maps, MSL benchmarks
Other Not Available 12.5 MLLW (Mean Lower Low Water)
Additional Information Collapse
**Coastal flooding can occur at a stage of 12 feet, when onshore winds are present along with 20 foot seas.** Boston Harbor gage data and forecasts are in feet Mean Lower Low Water (MLLW).
Resources Collapse
Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Boston / Norton Weather Forecast Office
46 Commerce Way
Norton, MA 02766
(508) 622-3250
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