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Hydrograph River at a Glance Download
Long Island Sound near New London Harbor (IN MLLW) Tide Height (ft)Observed: 1.94 ft at 4:06AM Mar 25, 2023Observed: 1.88 ft at 4:12AM Mar 25, 2023Observed: 1.91 ft at 4:18AM Mar 25, 2023Observed: 1.86 ft at 4:24AM Mar 25, 2023Observed: 1.84 ft at 4:30AM Mar 25, 2023Observed: 1.76 ft at 4:36AM Mar 25, 2023Observed: 1.71 ft at 4:42AM Mar 25, 2023Observed: 1.66 ft at 4:48AM Mar 25, 2023Observed: 1.56 ft at 4:54AM Mar 25, 2023Observed: 1.44 ft at 5:00AM Mar 25, 2023Observed: 1.38 ft at 5:06AM Mar 25, 2023Observed: 1.3 ft at 5:12AM Mar 25, 2023Observed: 1.21 ft at 5:18AM Mar 25, 2023Observed: 1.18 ft at 5:24AM Mar 25, 2023Observed: 1.09 ft at 5:30AM Mar 25, 2023Observed: 1.01 ft at 5:36AM Mar 25, 2023Observed: 0.9 ft at 5:42AM Mar 25, 2023Observed: 0.82 ft at 5:48AM Mar 25, 2023Observed: 0.79 ft at 5:54AM Mar 25, 2023Observed: 0.76 ft at 6:00AM Mar 25, 2023Observed: 0.74 ft at 6:06AM Mar 25, 2023Observed: 0.69 ft at 6:12AM Mar 25, 2023Observed: 0.65 ft at 6:18AM Mar 25, 2023Observed: 0.62 ft at 6:24AM Mar 25, 2023Observed: 0.54 ft at 6:30AM Mar 25, 2023Observed: 0.47 ft at 6:36AM Mar 25, 2023Observed: 0.45 ft at 6:42AM Mar 25, 2023Observed: 0.4 ft at 6:48AM Mar 25, 2023Observed: 0.39 ft at 6:54AM Mar 25, 2023Observed: 0.38 ft at 7:00AM Mar 25, 2023Observed: 0.39 ft at 7:06AM Mar 25, 2023Observed: 0.39 ft at 7:12AM Mar 25, 2023Observed: 0.43 ft at 7:18AM Mar 25, 2023Observed: 0.44 ft at 7:24AM Mar 25, 2023Observed: 0.45 ft at 7:30AM Mar 25, 2023Observed: 0.41 ft at 7:36AM Mar 25, 2023Observed: 0.36 ft at 7:42AM Mar 25, 2023Observed: 0.39 ft at 7:48AM Mar 25, 2023Observed: 0.43 ft at 7:54AM Mar 25, 2023Observed: 0.47 ft at 8:00AM Mar 25, 2023Observed: 0.47 ft at 8:06AM Mar 25, 2023Observed: 0.56 ft at 8:12AM Mar 25, 2023Observed: 0.9 ft at 8:42AM Mar 25, 2023Observed: 0.98 ft at 8:48AM Mar 25, 2023Observed: 1.08 ft at 8:54AM Mar 25, 2023Observed: 1.12 ft at 9:00AM Mar 25, 2023Observed: 1.23 ft at 9:06AM Mar 25, 2023Observed: 1.29 ft at 9:12AM Mar 25, 2023Observed: 1.35 ft at 9:18AM Mar 25, 2023Observed: 1.39 ft at 9:24AM Mar 25, 2023Observed: 1.45 ft at 9:30AM Mar 25, 2023Observed: 1.53 ft at 9:36AM Mar 25, 2023Observed: 1.64 ft at 9:42AM Mar 25, 2023Observed: 1.72 ft at 9:48AM Mar 25, 2023Observed: 1.72 ft at 9:54AM Mar 25, 2023Observed: 1.75 ft at 10:00AM Mar 25, 2023Observed: 1.83 ft at 10:06AM Mar 25, 2023Observed: 1.91 ft at 10:12AM Mar 25, 2023Observed: 1.92 ft at 10:18AM Mar 25, 2023Observed: 1.97 ft at 10:24AM Mar 25, 2023Observed: 2.05 ft at 10:30AM Mar 25, 2023Observed: 2.15 ft at 10:36AM Mar 25, 2023Observed: 2.27 ft at 10:42AM Mar 25, 2023Observed: 2.33 ft at 10:48AM Mar 25, 2023Observed: 2.48 ft at 10:54AM Mar 25, 2023Observed: 2.55 ft at 11:00AM Mar 25, 2023Observed: 2.55 ft at 11:06AM Mar 25, 2023Observed: 2.6 ft at 11:12AM Mar 25, 2023Observed: 2.64 ft at 11:18AM Mar 25, 2023Observed: 2.72 ft at 11:24AM Mar 25, 2023Observed: 2.76 ft at 11:30AM Mar 25, 2023Observed: 2.78 ft at 11:36AM Mar 25, 2023Observed: 2.83 ft at 11:48AM Mar 25, 2023Observed: 2.86 ft at 11:54AM Mar 25, 2023Observed: 2.93 ft at 12:00PM Mar 25, 2023Observed: 3.01 ft at 12:06PM Mar 25, 2023Observed: 3.04 ft at 12:18PM Mar 25, 2023Observed: 3.1 ft at 12:24PM Mar 25, 2023Observed: 3.12 ft at 12:30PM Mar 25, 2023Observed: 3.19 ft at 12:36PM Mar 25, 2023Observed: 3.23 ft at 12:42PM Mar 25, 2023Observed: 3.21 ft at 12:48PM Mar 25, 2023Observed: 3.18 ft at 12:54PM Mar 25, 2023Observed: 3.25 ft at 1:00PM Mar 25, 2023Observed: 3.21 ft at 1:06PM Mar 25, 2023Observed: 3.19 ft at 1:12PM Mar 25, 2023Observed: 3.19 ft at 1:18PM Mar 25, 2023Observed: 3.16 ft at 1:24PM Mar 25, 2023Observed: 3.22 ft at 1:30PM Mar 25, 2023Observed: 3.07 ft at 1:36PM Mar 25, 2023Observed: 3.11 ft at 1:42PM Mar 25, 2023Observed: 3.11 ft at 1:48PM Mar 25, 2023Observed: 3.05 ft at 1:54PM Mar 25, 2023Observed: 3.03 ft at 2:00PM Mar 25, 2023Observed: 2.99 ft at 2:06PM Mar 25, 2023Observed: 3.06 ft at 2:12PM Mar 25, 2023Observed: 3.06 ft at 2:18PM Mar 25, 2023Observed: 3 ft at 2:24PM Mar 25, 2023Observed: 2.99 ft at 2:30PM Mar 25, 2023Observed: 3.01 ft at 2:36PM Mar 25, 2023Observed: 2.92 ft at 2:42PM Mar 25, 2023Observed: 2.86 ft at 2:48PM Mar 25, 2023Observed: 2.8 ft at 2:54PM Mar 25, 2023Observed: 2.69 ft at 3:00PM Mar 25, 2023Observed: 2.72 ft at 3:06PM Mar 25, 2023Observed: 2.62 ft at 3:12PM Mar 25, 2023Observed: 2.67 ft at 3:18PM Mar 25, 2023Observed: 2.69 ft at 3:24PM Mar 25, 2023Observed: 2.67 ft at 3:30PM Mar 25, 2023Observed: 2.63 ft at 3:36PM Mar 25, 2023Observed: 2.56 ft at 3:42PM Mar 25, 2023Observed: 2.5 ft at 3:48PM Mar 25, 2023Observed: 2.47 ft at 3:54PM Mar 25, 2023Observed: 2.33 ft at 4:00PM Mar 25, 2023Observed: 2.23 ft at 4:06PM Mar 25, 2023Observed: 2.25 ft at 4:12PM Mar 25, 2023Observed: 2.2 ft at 4:18PM Mar 25, 2023Observed: 2.15 ft at 4:24PM Mar 25, 2023Observed: 2.13 ft at 4:30PM Mar 25, 2023Observed: 2.1 ft at 4:36PM Mar 25, 2023Observed: 2.1 ft at 4:42PM Mar 25, 2023Observed: 2.04 ft at 4:48PM Mar 25, 2023Observed: 2.02 ft at 4:54PM Mar 25, 2023Observed: 2.02 ft at 5:00PM Mar 25, 2023Observed: 2.04 ft at 5:06PM Mar 25, 2023Observed: 2.06 ft at 5:12PM Mar 25, 2023Observed: 2.07 ft at 5:18PM Mar 25, 2023Observed: 2.07 ft at 5:24PM Mar 25, 2023Observed: 1.98 ft at 5:30PM Mar 25, 2023Observed: 1.91 ft at 5:36PM Mar 25, 2023Observed: 1.84 ft at 5:42PM Mar 25, 2023Observed: 1.75 ft at 5:48PM Mar 25, 2023Observed: 1.77 ft at 5:54PM Mar 25, 2023Observed: 1.77 ft at 6:00PM Mar 25, 2023Observed: 1.81 ft at 6:06PM Mar 25, 2023Observed: 1.82 ft at 6:12PM Mar 25, 2023Observed: 1.78 ft at 6:18PM Mar 25, 2023Observed: 1.84 ft at 6:24PM Mar 25, 2023Observed: 1.87 ft at 6:30PM Mar 25, 2023Observed: 1.92 ft at 6:36PM Mar 25, 2023Observed: 1.96 ft at 6:42PM Mar 25, 2023Observed: 1.99 ft at 6:48PM Mar 25, 2023Observed: 2.01 ft at 6:54PM Mar 25, 2023Observed: 2.02 ft at 7:00PM Mar 25, 2023Observed: 1.99 ft at 7:06PM Mar 25, 2023Observed: 1.94 ft at 7:12PM Mar 25, 2023Observed: 1.91 ft at 7:18PM Mar 25, 2023Observed: 1.86 ft at 7:24PM Mar 25, 2023Observed: 1.83 ft at 7:30PM Mar 25, 2023Observed: 1.86 ft at 7:36PM Mar 25, 2023Observed: 1.91 ft at 7:42PM Mar 25, 2023Observed: 2.15 ft at 8:00PM Mar 25, 2023Observed: 2.19 ft at 8:06PM Mar 25, 2023Observed: 2.26 ft at 8:12PM Mar 25, 2023Observed: 2.31 ft at 8:18PM Mar 25, 2023Observed: 2.32 ft at 8:24PM Mar 25, 2023Observed: 2.34 ft at 8:30PM Mar 25, 2023Observed: 2.38 ft at 8:36PM Mar 25, 2023Observed: 2.41 ft at 8:42PM Mar 25, 2023Observed: 2.45 ft at 8:48PM Mar 25, 2023Observed: 2.43 ft at 8:54PM Mar 25, 2023Observed: 2.48 ft at 9:00PM Mar 25, 2023Observed: 2.49 ft at 9:06PM Mar 25, 2023Observed: 2.54 ft at 9:12PM Mar 25, 2023Observed: 2.61 ft at 9:18PM Mar 25, 2023Observed: 2.74 ft at 9:24PM Mar 25, 2023Observed: 2.84 ft at 9:30PM Mar 25, 2023Observed: 2.94 ft at 9:36PM Mar 25, 2023Observed: 3.05 ft at 9:42PM Mar 25, 2023Observed: 3.2 ft at 9:48PM Mar 25, 2023Observed: 3.28 ft at 9:54PM Mar 25, 2023Observed: 3.35 ft at 10:00PM Mar 25, 2023Observed: 3.37 ft at 10:06PM Mar 25, 2023Observed: 3.39 ft at 10:12PM Mar 25, 2023Observed: 3.43 ft at 10:18PM Mar 25, 2023Observed: 3.43 ft at 10:24PM Mar 25, 2023Observed: 3.46 ft at 10:30PM Mar 25, 2023Observed: 3.52 ft at 10:36PM Mar 25, 2023Observed: 3.57 ft at 10:42PM Mar 25, 2023Observed: 3.62 ft at 10:48PM Mar 25, 2023Observed: 3.7 ft at 10:54PM Mar 25, 2023Observed: 3.84 ft at 11:00PM Mar 25, 2023Observed: 3.95 ft at 11:06PM Mar 25, 2023Observed: 4.01 ft at 11:12PM Mar 25, 2023Observed: 4.08 ft at 11:18PM Mar 25, 2023Observed: 4.16 ft at 11:24PM Mar 25, 2023Observed: 4.16 ft at 11:30PM Mar 25, 2023Observed: 4.19 ft at 11:36PM Mar 25, 2023Observed: 4.23 ft at 11:42PM Mar 25, 2023Observed: 4.27 ft at 11:48PM Mar 25, 2023Observed: 4.33 ft at 11:54PM Mar 25, 2023Observed: 4.35 ft at 12:00AM Mar 26, 2023Observed: 4.33 ft at 12:06AM Mar 26, 2023Observed: 4.35 ft at 12:12AM Mar 26, 2023Observed: 4.42 ft at 12:18AM Mar 26, 2023Observed: 4.45 ft at 12:24AM Mar 26, 2023Observed: 4.5 ft at 12:30AM Mar 26, 2023Observed: 4.53 ft at 12:36AM Mar 26, 2023Observed: 4.5 ft at 12:42AM Mar 26, 2023Observed: 4.49 ft at 12:48AM Mar 26, 2023Observed: 4.55 ft at 12:54AM Mar 26, 2023Observed: 4.57 ft at 1:00AM Mar 26, 2023Observed: 4.63 ft at 1:06AM Mar 26, 2023Highest Observation: 4.64 ft at 1:12AM Mar 26, 2023Observed: 4.56 ft at 1:18AM Mar 26, 2023Observed: 4.52 ft at 1:24AM Mar 26, 2023Observed: 4.39 ft at 1:30AM Mar 26, 2023Observed: 4.33 ft at 1:36AM Mar 26, 2023Observed: 4.35 ft at 1:42AM Mar 26, 2023Observed: 4.32 ft at 1:48AM Mar 26, 2023Observed: 4.35 ft at 1:54AM Mar 26, 2023Observed: 4.31 ft at 2:00AM Mar 26, 2023Observed: 4.26 ft at 2:06AM Mar 26, 2023Observed: 4.2 ft at 2:12AM Mar 26, 2023Observed: 4.14 ft at 2:18AM Mar 26, 2023Observed: 4.02 ft at 2:24AM Mar 26, 2023Observed: 3.94 ft at 2:30AM Mar 26, 2023Observed: 3.86 ft at 2:36AM Mar 26, 2023Observed: 3.9 ft at 2:42AM Mar 26, 2023Observed: 3.83 ft at 2:48AM Mar 26, 2023Observed: 3.71 ft at 2:54AM Mar 26, 2023Observed: 3.62 ft at 3:00AM Mar 26, 2023Observed: 3.46 ft at 3:06AM Mar 26, 2023Observed: 3.32 ft at 3:12AM Mar 26, 2023Observed: 3.28 ft at 3:18AM Mar 26, 2023Observed: 3.24 ft at 3:24AM Mar 26, 2023Observed: 3.18 ft at 3:30AM Mar 26, 2023Observed: 3.23 ft at 3:36AM Mar 26, 2023Observed: 3.16 ft at 3:42AM Mar 26, 2023Observed: 3.22 ft at 3:48AM Mar 26, 2023Observed: 3.16 ft at 3:54AM Mar 26, 2023Observed: 3 ft at 4:00AM Mar 26, 2023Observed: 2.91 ft at 4:06AM Mar 26, 2023Observed: 2.84 ft at 4:12AM Mar 26, 2023Observed: 2.71 ft at 4:18AM Mar 26, 2023Observed: 2.66 ft at 4:24AM Mar 26, 2023Observed: 2.59 ft at 4:30AM Mar 26, 2023Observed: 2.56 ft at 4:36AM Mar 26, 2023Observed: 2.54 ft at 4:42AM Mar 26, 2023Observed: 2.51 ft at 4:48AM Mar 26, 2023Observed: 2.47 ft at 4:54AM Mar 26, 2023Observed: 2.51 ft at 5:00AM Mar 26, 2023Observed: 2.51 ft at 5:06AM Mar 26, 2023Observed: 2.46 ft at 5:12AM Mar 26, 2023Observed: 2.43 ft at 5:18AM Mar 26, 2023Observed: 2.4 ft at 5:24AM Mar 26, 2023Observed: 2.34 ft at 5:30AM Mar 26, 2023Observed: 2.25 ft at 5:36AM Mar 26, 2023Observed: 2.16 ft at 5:42AM Mar 26, 2023Observed: 2.11 ft at 5:48AM Mar 26, 2023Observed: 2.03 ft at 5:54AM Mar 26, 2023Observed: 1.86 ft at 6:00AM Mar 26, 2023Observed: 1.73 ft at 6:06AM Mar 26, 2023Observed: 1.63 ft at 6:12AM Mar 26, 2023Observed: 1.59 ft at 6:18AM Mar 26, 2023Observed: 1.51 ft at 6:24AM Mar 26, 2023Observed: 1.45 ft at 6:30AM Mar 26, 2023Observed: 1.45 ft at 6:36AM Mar 26, 2023Observed: 1.42 ft at 6:42AM Mar 26, 2023Observed: 1.31 ft at 6:48AM Mar 26, 2023Observed: 1.27 ft at 6:54AM Mar 26, 2023Observed: 1.22 ft at 7:00AM Mar 26, 2023Observed: 1.16 ft at 7:06AM Mar 26, 2023Observed: 1.09 ft at 7:12AM Mar 26, 2023Observed: 1.03 ft at 7:18AM Mar 26, 2023Observed: 1.03 ft at 7:24AM Mar 26, 2023Observed: 0.99 ft at 7:30AM Mar 26, 2023Observed: 0.91 ft at 7:36AM Mar 26, 2023Observed: 0.88 ft at 7:42AM Mar 26, 2023Observed: 0.83 ft at 7:48AM Mar 26, 2023Observed: 0.86 ft at 7:54AM Mar 26, 2023Observed: 0.86 ft at 8:00AM Mar 26, 2023Observed: 0.86 ft at 8:06AM Mar 26, 2023Observed: 0.89 ft at 8:12AM Mar 26, 2023Observed: 0.91 ft at 8:18AM Mar 26, 2023Observed: 0.9 ft at 8:24AM Mar 26, 2023Observed: 0.9 ft at 8:30AM Mar 26, 2023Observed: 0.88 ft at 8:36AM Mar 26, 2023Observed: 0.88 ft at 8:42AM Mar 26, 2023Observed: 0.89 ft at 8:48AM Mar 26, 2023Observed: 0.89 ft at 8:54AM Mar 26, 2023Observed: 0.86 ft at 9:00AM Mar 26, 2023Observed: 0.87 ft at 9:06AM Mar 26, 2023Observed: 0.92 ft at 9:12AM Mar 26, 2023Observed: 1 ft at 9:18AM Mar 26, 2023Observed: 1.02 ft at 9:24AM Mar 26, 2023Observed: 1.07 ft at 9:30AM Mar 26, 2023Observed: 1.12 ft at 9:36AM Mar 26, 2023Observed: 1.18 ft at 9:42AM Mar 26, 2023Observed: 1.24 ft at 9:48AM Mar 26, 2023Observed: 1.27 ft at 9:54AM Mar 26, 2023Observed: 1.35 ft at 10:00AM Mar 26, 2023Observed: 1.47 ft at 10:06AM Mar 26, 2023Observed: 1.53 ft at 10:12AM Mar 26, 2023Observed: 1.59 ft at 10:18AM Mar 26, 2023Observed: 1.63 ft at 10:24AM Mar 26, 2023Observed: 1.7 ft at 10:30AM Mar 26, 2023Observed: 1.73 ft at 10:36AM Mar 26, 2023Observed: 1.72 ft at 10:42AM Mar 26, 2023Observed: 1.73 ft at 10:48AM Mar 26, 2023Observed: 1.75 ft at 10:54AM Mar 26, 2023Observed: 1.83 ft at 11:00AM Mar 26, 2023Observed: 1.9 ft at 11:06AM Mar 26, 2023Observed: 2 ft at 11:12AM Mar 26, 2023Observed: 2.06 ft at 11:18AM Mar 26, 2023Observed: 2.12 ft at 11:24AM Mar 26, 2023Observed: 2.17 ft at 11:30AM Mar 26, 2023Observed: 2.23 ft at 11:36AM Mar 26, 2023Observed: 2.26 ft at 11:42AM Mar 26, 2023Observed: 2.31 ft at 11:48AM Mar 26, 2023Observed: 2.36 ft at 11:54AM Mar 26, 2023Observed: 2.39 ft at 12:00PM Mar 26, 2023Observed: 2.42 ft at 12:06PM Mar 26, 2023Observed: 2.44 ft at 12:12PM Mar 26, 2023Observed: 2.5 ft at 12:18PM Mar 26, 2023Observed: 2.54 ft at 12:24PM Mar 26, 2023Observed: 2.58 ft at 12:30PM Mar 26, 2023Observed: 2.58 ft at 12:36PM Mar 26, 2023Observed: 2.6 ft at 12:42PM Mar 26, 2023Observed: 2.68 ft at 12:48PM Mar 26, 2023Observed: 2.73 ft at 12:54PM Mar 26, 2023Observed: 2.76 ft at 1:00PM Mar 26, 2023Observed: 2.78 ft at 1:06PM Mar 26, 2023Observed: 2.79 ft at 1:12PM Mar 26, 2023Observed: 2.81 ft at 1:18PM Mar 26, 2023Observed: 2.77 ft at 1:24PM Mar 26, 2023Observed: 2.77 ft at 1:30PM Mar 26, 2023Observed: 2.77 ft at 1:36PM Mar 26, 2023Observed: 2.78 ft at 1:42PM Mar 26, 2023Observed: 2.79 ft at 1:48PM Mar 26, 2023Observed: 2.78 ft at 1:54PM Mar 26, 2023Observed: 2.79 ft at 2:00PM Mar 26, 2023Observed: 2.78 ft at 2:06PM Mar 26, 2023Observed: 2.77 ft at 2:12PM Mar 26, 2023Observed: 2.74 ft at 2:18PM Mar 26, 2023Observed: 2.72 ft at 2:24PM Mar 26, 2023Observed: 2.69 ft at 2:30PM Mar 26, 2023Observed: 2.63 ft at 2:36PM Mar 26, 2023Observed: 2.59 ft at 2:42PM Mar 26, 2023Observed: 2.59 ft at 2:48PM Mar 26, 2023Observed: 2.56 ft at 2:54PM Mar 26, 2023Observed: 2.56 ft at 3:00PM Mar 26, 2023Observed: 2.56 ft at 3:06PM Mar 26, 2023Observed: 2.56 ft at 3:12PM Mar 26, 2023Observed: 2.53 ft at 3:18PM Mar 26, 2023Observed: 2.48 ft at 3:24PM Mar 26, 2023Observed: 2.45 ft at 3:30PM Mar 26, 2023Observed: 2.39 ft at 3:36PM Mar 26, 2023Observed: 2.34 ft at 3:42PM Mar 26, 2023Observed: 2.29 ft at 3:48PM Mar 26, 2023Observed: 2.24 ft at 3:54PM Mar 26, 2023Observed: 2.2 ft at 4:00PM Mar 26, 2023Observed: 2.14 ft at 4:06PM Mar 26, 2023Observed: 2.11 ft at 4:12PM Mar 26, 2023Observed: 2.08 ft at 4:18PM Mar 26, 2023Observed: 2.07 ft at 4:24PM Mar 26, 2023Observed: 2.07 ft at 4:30PM Mar 26, 2023Observed: 2.06 ft at 4:36PM Mar 26, 2023Observed: 2.04 ft at 4:42PM Mar 26, 2023Observed: 1.97 ft at 4:48PM Mar 26, 2023Observed: 1.87 ft at 4:54PM Mar 26, 2023Observed: 1.79 ft at 5:00PM Mar 26, 2023Observed: 1.7 ft at 5:06PM Mar 26, 2023Observed: 1.62 ft at 5:12PM Mar 26, 2023Observed: 1.55 ft at 5:18PM Mar 26, 2023Observed: 1.51 ft at 5:24PM Mar 26, 2023Observed: 1.46 ft at 5:30PM Mar 26, 2023Observed: 1.45 ft at 5:36PM Mar 26, 2023Observed: 1.46 ft at 5:42PM Mar 26, 2023Observed: 1.47 ft at 5:48PM Mar 26, 2023Observed: 1.44 ft at 5:54PM Mar 26, 2023Observed: 1.41 ft at 6:00PM Mar 26, 2023Observed: 1.37 ft at 6:06PM Mar 26, 2023Observed: 1.32 ft at 6:12PM Mar 26, 2023Observed: 1.31 ft at 6:18PM Mar 26, 2023Observed: 1.26 ft at 6:24PM Mar 26, 2023Observed: 1.22 ft at 6:30PM Mar 26, 2023Observed: 1.19 ft at 6:36PM Mar 26, 2023Observed: 1.14 ft at 6:42PM Mar 26, 2023Observed: 1.14 ft at 6:48PM Mar 26, 2023Observed: 1.1 ft at 6:54PM Mar 26, 2023Observed: 1.08 ft at 7:00PM Mar 26, 2023Observed: 1.08 ft at 7:06PM Mar 26, 2023Observed: 1.1 ft at 7:12PM Mar 26, 2023Observed: 1.11 ft at 7:18PM Mar 26, 2023Observed: 1.15 ft at 7:24PM Mar 26, 2023Observed: 1.15 ft at 7:30PM Mar 26, 2023Observed: 1.17 ft at 7:36PM Mar 26, 2023Observed: 1.14 ft at 7:42PM Mar 26, 2023Observed: 1.01 ft at 8:00PM Mar 26, 2023Observed: 1 ft at 8:06PM Mar 26, 2023Observed: 0.99 ft at 8:12PM Mar 26, 2023Observed: 0.98 ft at 8:18PM Mar 26, 2023Observed: 1.01 ft at 8:24PM Mar 26, 2023Observed: 1.03 ft at 8:30PM Mar 26, 2023Observed: 1.04 ft at 8:36PM Mar 26, 2023Observed: 1.09 ft at 8:42PM Mar 26, 2023Observed: 1.13 ft at 8:48PM Mar 26, 2023Observed: 1.17 ft at 8:54PM Mar 26, 2023Observed: 1.22 ft at 9:00PM Mar 26, 2023Observed: 1.24 ft at 9:06PM Mar 26, 2023Observed: 1.26 ft at 9:12PM Mar 26, 2023Observed: 1.33 ft at 9:24PM Mar 26, 2023Observed: 1.34 ft at 9:30PM Mar 26, 2023Observed: 1.36 ft at 9:36PM Mar 26, 2023Observed: 1.42 ft at 9:42PM Mar 26, 2023Observed: 1.49 ft at 9:48PM Mar 26, 2023Observed: 1.52 ft at 9:54PM Mar 26, 2023Observed: 1.58 ft at 10:00PM Mar 26, 2023Observed: 1.67 ft at 10:06PM Mar 26, 2023Observed: 1.77 ft at 10:12PM Mar 26, 2023Observed: 1.83 ft at 10:18PM Mar 26, 2023Observed: 1.85 ft at 10:24PM Mar 26, 2023Observed: 1.86 ft at 10:30PM Mar 26, 2023Observed: 1.92 ft at 10:36PM Mar 26, 2023Observed: 1.97 ft at 10:42PM Mar 26, 2023Observed: 2.02 ft at 10:48PM Mar 26, 2023Observed: 2.06 ft at 10:54PM Mar 26, 2023Observed: 2.13 ft at 11:00PM Mar 26, 2023Observed: 2.18 ft at 11:06PM Mar 26, 2023Observed: 2.21 ft at 11:12PM Mar 26, 2023Observed: 2.24 ft at 11:18PM Mar 26, 2023Observed: 2.28 ft at 11:24PM Mar 26, 2023Observed: 2.36 ft at 11:30PM Mar 26, 2023Observed: 2.43 ft at 11:36PM Mar 26, 2023Observed: 2.47 ft at 11:42PM Mar 26, 2023Observed: 2.54 ft at 11:48PM Mar 26, 2023Observed: 2.6 ft at 11:54PM Mar 26, 2023Observed: 2.68 ft at 12:00AM Mar 27, 2023Observed: 2.75 ft at 12:06AM Mar 27, 2023Observed: 2.8 ft at 12:12AM Mar 27, 2023Observed: 2.86 ft at 12:18AM Mar 27, 2023Observed: 2.88 ft at 12:24AM Mar 27, 2023Observed: 2.92 ft at 12:30AM Mar 27, 2023Observed: 2.96 ft at 12:36AM Mar 27, 2023Observed: 3.01 ft at 12:42AM Mar 27, 2023Observed: 3.04 ft at 12:48AM Mar 27, 2023Observed: 3.09 ft at 12:54AM Mar 27, 2023Observed: 3.13 ft at 1:00AM Mar 27, 2023Observed: 3.17 ft at 1:06AM Mar 27, 2023Observed: 3.2 ft at 1:12AM Mar 27, 2023Observed: 3.23 ft at 1:18AM Mar 27, 2023Observed: 3.26 ft at 1:24AM Mar 27, 2023Observed: 3.29 ft at 1:30AM Mar 27, 2023Observed: 3.31 ft at 1:36AM Mar 27, 2023Observed: 3.34 ft at 1:42AM Mar 27, 2023Observed: 3.37 ft at 1:48AM Mar 27, 2023Observed: 3.38 ft at 1:54AM Mar 27, 2023Observed: 3.39 ft at 2:00AM Mar 27, 2023Observed: 3.39 ft at 2:06AM Mar 27, 2023Observed: 3.4 ft at 2:12AM Mar 27, 2023Observed: 3.4 ft at 2:18AM Mar 27, 2023Observed: 3.4 ft at 2:24AM Mar 27, 2023Observed: 3.37 ft at 2:30AM Mar 27, 2023Observed: 3.33 ft at 2:36AM Mar 27, 2023Observed: 3.32 ft at 2:42AM Mar 27, 2023Observed: 3.29 ft at 2:48AM Mar 27, 2023Observed: 3.25 ft at 2:54AM Mar 27, 2023Observed: 3.22 ft at 3:00AM Mar 27, 2023Observed: 3.19 ft at 3:06AM Mar 27, 2023Observed: 3.18 ft at 3:12AM Mar 27, 2023Observed: 3.16 ft at 3:18AM Mar 27, 2023Observed: 3.12 ft at 3:24AM Mar 27, 2023Observed: 3.1 ft at 3:30AM Mar 27, 2023Observed: 3.05 ft at 3:36AM Mar 27, 2023Forecast: 2.3 ft 5:00AM Mar 27, 2023Forecast: 1.7 ft 6:00AM Mar 27, 2023Forecast: 1.2 ft 7:00AM Mar 27, 2023Forecast: 0.7 ft 8:00AM Mar 27, 2023Forecast: 0.6 ft 9:00AM Mar 27, 2023Forecast: 0.8 ft 10:00AM Mar 27, 2023Forecast: 1.2 ft 11:00AM Mar 27, 2023Forecast: 1.7 ft 12:00PM Mar 27, 2023Forecast: 2.3 ft 1:00PM Mar 27, 2023Forecast: 2.5 ft 2:00PM Mar 27, 2023Forecast: 2.6 ft 3:00PM Mar 27, 2023Forecast: 2.5 ft 4:00PM Mar 27, 2023Forecast: 2.2 ft 5:00PM Mar 27, 2023Forecast: 2 ft 6:00PM Mar 27, 2023Forecast: 1.7 ft 7:00PM Mar 27, 2023Forecast: 1.4 ft 8:00PM Mar 27, 2023Forecast: 1.3 ft 9:00PM Mar 27, 2023Forecast: 1.4 ft 10:00PM Mar 27, 2023Forecast: 1.9 ft 11:00PM Mar 27, 2023Forecast: 2.3 ft 12:00AM Mar 28, 2023Forecast: 2.8 ft 1:00AM Mar 28, 2023Forecast: 3.1 ft 2:00AM Mar 28, 2023Highest Forecast: 3.3 ft 3:00AM Mar 28, 2023Highest Forecast: 3.3 ft 4:00AM Mar 28, 2023Forecast: 3 ft 5:00AM Mar 28, 2023Forecast: 2.5 ft 6:00AM Mar 28, 2023Forecast: 2.2 ft 7:00AM Mar 28, 2023Forecast: 1.7 ft 8:00AM Mar 28, 2023Forecast: 1.2 ft 9:00AM Mar 28, 2023Forecast: 1 ft 10:00AM Mar 28, 2023Forecast: 1.1 ft 11:00AM Mar 28, 2023Forecast: 1.5 ft 12:00PM Mar 28, 2023Forecast: 1.9 ft 1:00PM Mar 28, 2023Forecast: 2.4 ft 2:00PM Mar 28, 2023Forecast: 2.6 ft 3:00PM Mar 28, 2023Forecast: 2.7 ft 4:00PM Mar 28, 2023Forecast: 2.6 ft 5:00PM Mar 28, 2023Forecast: 2.3 ft 6:00PM Mar 28, 2023Forecast: 2 ft 7:00PM Mar 28, 2023Forecast: 1.8 ft 8:00PM Mar 28, 2023Forecast: 1.5 ft 9:00PM Mar 28, 2023Forecast: 1.3 ft 10:00PM Mar 28, 2023Forecast: 1.4 ft 11:00PM Mar 28, 2023Forecast: 1.7 ft 12:00AM Mar 29, 2023Forecast: 2.1 ft 1:00AM Mar 29, 2023Forecast: 2.4 ft 2:00AM Mar 29, 2023Forecast: 2.8 ft 3:00AM Mar 29, 2023Forecast: 2.9 ft 4:00AM Mar 29, 2023Forecast: 3 ft 5:00AM Mar 29, 2023Forecast: 2.6 ft 6:00AM Mar 29, 2023Forecast: 2.3 ft 7:00AM Mar 29, 2023Forecast: 2 ft 8:00AM Mar 29, 2023Forecast: 1.6 ft 9:00AM Mar 29, 2023Forecast: 1.1 ft 10:00AM Mar 29, 2023Forecast: 0.9 ft 11:00AM Mar 29, 2023Forecast: 1.1 ft 12:00PM Mar 29, 2023Forecast: 1.4 ft 1:00PM Mar 29, 2023Forecast: 1.8 ft 2:00PM Mar 29, 2023Forecast: 2.2 ft 3:00PM Mar 29, 2023Forecast: 2.3 ft 4:00PM Mar 29, 2023NOAA National Ocean ServiceNLNC3(plotting HMIRG) Graph Created (4:01AM Mar 27, 2023)ObservedForecast (issued 5:49AM Mar 26)Latest observed value: 3.05 ft at 3:36 AM EDT 27-Mar-2023. Flood Stage is 5 ft
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NOTE: Tide Forecasts are a total water level forecast referenced to mean lower low water. Please refer to Coastal Flood Advisories and Warnings for official water level forecasts during periods of coastal flooding. During tropical cyclones, please refer here for additional storm surge information. Click here for Flood Category definitions.

Reliability of the Forecast: Forecast data shown here are guidance values only. Please refer to your local NWS office.

NOTE: Forecasts for the Long Island Sound near New London Harbor (IN MLLW) are issued routinely year-round.

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

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Flood Categories (in feet)
Major Flood Stage: 7.8
Moderate Flood Stage: 6
Flood Stage: 5
Action Stage: 0
Low Stage (in feet): -1.8

Historic Crests
(1) 10.58 ft on 09/21/1938
(2) 9.58 ft on 08/31/1954
(3) 8.04 ft on 10/29/2012
(4) 7.58 ft on 11/25/1950
(5) 7.08 ft on 09/14/1944

(P): Preliminary values subject to further review.

Recent Crests
(1) 8.04 ft on 10/29/2012
(2) 9.58 ft on 08/31/1954
(3) 7.58 ft on 11/25/1950
(4) 7.08 ft on 09/14/1944
(5) 10.58 ft on 09/21/1938

(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
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Gauge LocationGauge Map Marker
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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.
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If you notice any errors in the below information, please contact our Webmaster
8 Along low lying portions of the Long Island Sound, two to three feet of inundation is possible a few blocks inland with one to two feet of inundation possible north of I-95 in several low spots around waterways such as the Niantic River in Niantic, the Mystic River in Mystic. Nearly fifteen miles inland along the Connecticut and Thames Rivers, inundation is also possible with major damage in regions such as West End Drive and Seaside Lane in Old Lyme.
6.5 Inundation of one to two feet of water occurs on streets and several properties in Saybrook Point, as well as in the Marina where several feet of water is possible, as water reaches over the seawall.
6 Coastal flooding causes Niantic River Road to close between 1st and 2nd Avenue.
5 Flooding occurs in the downtown Mystic area directly along the waterfront, primarily in the street on Gravel Street and River Road. Groton experiences minor shoreline flooding.
Photos
(1) Tidal Gage at New London, CT
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Latitude: 41.361000° N, Longitude: 72.090000° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 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 -1.84 3.16 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 Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:
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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
Upton Weather Forecast Office
175 Brookhaven Ave. Bldg. NWS-1
Upton, NY 11973
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