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Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

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Hydrograph River at a Glance Download
Great South Bay at West Sayville (IN MLLW) Tide Height (ft)Observed: 1.03 ft at 5:06AM May 31, 2023Observed: 1.05 ft at 5:12AM May 31, 2023Observed: 1.06 ft at 5:18AM May 31, 2023Observed: 1.08 ft at 5:24AM May 31, 2023Observed: 1.11 ft at 5:30AM May 31, 2023Observed: 1.12 ft at 5:36AM May 31, 2023Observed: 1.15 ft at 5:42AM May 31, 2023Observed: 1.17 ft at 5:48AM May 31, 2023Observed: 1.19 ft at 5:54AM May 31, 2023Observed: 1.21 ft at 6:00AM May 31, 2023Observed: 1.23 ft at 6:06AM May 31, 2023Observed: 1.25 ft at 6:12AM May 31, 2023Observed: 1.28 ft at 6:18AM May 31, 2023Observed: 1.29 ft at 6:24AM May 31, 2023Observed: 1.3 ft at 6:30AM May 31, 2023Observed: 1.34 ft at 6:36AM May 31, 2023Observed: 1.35 ft at 6:42AM May 31, 2023Observed: 1.37 ft at 6:48AM May 31, 2023Observed: 1.39 ft at 6:54AM May 31, 2023Observed: 1.4 ft at 7:00AM May 31, 2023Observed: 1.41 ft at 7:06AM May 31, 2023Observed: 1.43 ft at 7:12AM May 31, 2023Observed: 1.45 ft at 7:18AM May 31, 2023Observed: 1.47 ft at 7:30AM May 31, 2023Observed: 1.48 ft at 7:36AM May 31, 2023Observed: 1.49 ft at 7:42AM May 31, 2023Observed: 1.5 ft at 7:48AM May 31, 2023Observed: 1.5 ft at 7:54AM May 31, 2023Observed: 1.52 ft at 8:00AM May 31, 2023Observed: 1.51 ft at 8:06AM May 31, 2023Observed: 1.51 ft at 8:12AM May 31, 2023Observed: 1.49 ft at 8:18AM May 31, 2023Observed: 1.48 ft at 8:24AM May 31, 2023Observed: 1.48 ft at 8:30AM May 31, 2023Observed: 1.47 ft at 8:36AM May 31, 2023Observed: 1.46 ft at 8:42AM May 31, 2023Observed: 1.44 ft at 8:48AM May 31, 2023Observed: 1.39 ft at 8:49AM May 31, 2023Observed: 1.43 ft at 8:54AM May 31, 2023Observed: 1.38 ft at 8:55AM May 31, 2023Observed: 1.41 ft at 9:00AM May 31, 2023Observed: 1.39 ft at 9:06AM May 31, 2023Observed: 1.38 ft at 9:12AM May 31, 2023Observed: 1.37 ft at 9:18AM May 31, 2023Observed: 1.35 ft at 9:24AM May 31, 2023Observed: 1.33 ft at 9:30AM May 31, 2023Observed: 1.31 ft at 9:36AM May 31, 2023Observed: 1.3 ft at 9:42AM May 31, 2023Observed: 1.27 ft at 9:48AM May 31, 2023Observed: 1.24 ft at 9:54AM May 31, 2023Observed: 1.23 ft at 10:00AM May 31, 2023Observed: 1.22 ft at 10:06AM May 31, 2023Observed: 1.2 ft at 10:12AM May 31, 2023Observed: 1.18 ft at 10:18AM May 31, 2023Observed: 1.15 ft at 10:24AM May 31, 2023Observed: 1.14 ft at 10:30AM May 31, 2023Observed: 1.11 ft at 10:36AM May 31, 2023Observed: 1.09 ft at 10:42AM May 31, 2023Observed: 1.07 ft at 10:48AM May 31, 2023Observed: 1.04 ft at 10:54AM May 31, 2023Observed: 1.02 ft at 11:00AM May 31, 2023Observed: 1 ft at 11:06AM May 31, 2023Observed: 0.97 ft at 11:12AM May 31, 2023Observed: 0.95 ft at 11:18AM May 31, 2023Observed: 0.93 ft at 11:24AM May 31, 2023Observed: 0.9 ft at 11:30AM May 31, 2023Observed: 0.89 ft at 11:36AM May 31, 2023Observed: 0.87 ft at 11:42AM May 31, 2023Observed: 0.84 ft at 11:48AM May 31, 2023Observed: 0.82 ft at 11:54AM May 31, 2023Observed: 0.82 ft at 12:00PM May 31, 2023Observed: 0.79 ft at 12:06PM May 31, 2023Observed: 0.76 ft at 12:12PM May 31, 2023Observed: 0.74 ft at 12:18PM May 31, 2023Observed: 0.72 ft at 12:24PM May 31, 2023Observed: 0.71 ft at 12:30PM May 31, 2023Observed: 0.69 ft at 12:36PM May 31, 2023Observed: 0.67 ft at 12:42PM May 31, 2023Observed: 0.64 ft at 12:48PM May 31, 2023Observed: 0.62 ft at 12:54PM May 31, 2023Observed: 0.61 ft at 1:00PM May 31, 2023Observed: 0.58 ft at 1:06PM May 31, 2023Observed: 0.57 ft at 1:12PM May 31, 2023Observed: 0.56 ft at 1:18PM May 31, 2023Observed: 0.53 ft at 1:24PM May 31, 2023Observed: 0.52 ft at 1:30PM May 31, 2023Observed: 0.51 ft at 1:36PM May 31, 2023Observed: 0.49 ft at 1:42PM May 31, 2023Observed: 0.47 ft at 1:48PM May 31, 2023Observed: 0.46 ft at 1:54PM May 31, 2023Observed: 0.45 ft at 2:00PM May 31, 2023Observed: 0.43 ft at 2:06PM May 31, 2023Observed: 0.41 ft at 2:12PM May 31, 2023Observed: 0.41 ft at 2:18PM May 31, 2023Observed: 0.4 ft at 2:24PM May 31, 2023Observed: 0.39 ft at 2:30PM May 31, 2023Observed: 0.38 ft at 2:36PM May 31, 2023Observed: 0.36 ft at 2:50PM May 31, 2023Observed: 0.36 ft at 2:56PM May 31, 2023Observed: 0.44 ft at 3:42PM May 31, 2023Observed: 0.47 ft at 3:48PM May 31, 2023Observed: 0.48 ft at 3:54PM May 31, 2023Observed: 0.5 ft at 4:00PM May 31, 2023Observed: 0.53 ft at 4:06PM May 31, 2023Observed: 0.56 ft at 4:12PM May 31, 2023Observed: 0.58 ft at 4:18PM May 31, 2023Observed: 0.56 ft at 4:24PM May 31, 2023Observed: 0.6 ft at 4:30PM May 31, 2023Observed: 0.62 ft at 4:36PM May 31, 2023Observed: 0.63 ft at 4:42PM May 31, 2023Observed: 0.66 ft at 4:48PM May 31, 2023Observed: 0.69 ft at 4:54PM May 31, 2023Observed: 0.7 ft at 5:00PM May 31, 2023Observed: 0.72 ft at 5:06PM May 31, 2023Observed: 0.74 ft at 5:12PM May 31, 2023Observed: 0.76 ft at 5:18PM May 31, 2023Observed: 0.79 ft at 5:24PM May 31, 2023Observed: 0.8 ft at 5:30PM May 31, 2023Observed: 0.83 ft at 5:36PM May 31, 2023Observed: 0.86 ft at 5:42PM May 31, 2023Observed: 0.89 ft at 5:48PM May 31, 2023Observed: 0.91 ft at 5:54PM May 31, 2023Observed: 0.93 ft at 6:00PM May 31, 2023Observed: 0.96 ft at 6:06PM May 31, 2023Observed: 0.99 ft at 6:12PM May 31, 2023Observed: 1.03 ft at 6:18PM May 31, 2023Observed: 1.05 ft at 6:24PM May 31, 2023Observed: 1.07 ft at 6:30PM May 31, 2023Observed: 1.11 ft at 6:36PM May 31, 2023Observed: 1.14 ft at 6:42PM May 31, 2023Observed: 1.16 ft at 6:48PM May 31, 2023Observed: 1.19 ft at 6:54PM May 31, 2023Observed: 1.22 ft at 7:00PM May 31, 2023Observed: 1.24 ft at 7:06PM May 31, 2023Observed: 1.26 ft at 7:12PM May 31, 2023Observed: 1.29 ft at 7:18PM May 31, 2023Observed: 1.31 ft at 7:24PM May 31, 2023Observed: 1.32 ft at 7:30PM May 31, 2023Observed: 1.35 ft at 7:36PM May 31, 2023Observed: 1.55 ft at 8:42PM May 31, 2023Observed: 1.56 ft at 8:48PM May 31, 2023Observed: 1.57 ft at 8:50PM May 31, 2023Observed: 1.55 ft at 8:54PM May 31, 2023Observed: 1.58 ft at 8:56PM May 31, 2023Observed: 1.57 ft at 9:00PM May 31, 2023Observed: 1.57 ft at 9:06PM May 31, 2023Observed: 1.58 ft at 9:12PM May 31, 2023Observed: 1.59 ft at 9:18PM May 31, 2023Observed: 1.58 ft at 9:24PM May 31, 2023Observed: 1.58 ft at 9:30PM May 31, 2023Observed: 1.57 ft at 9:36PM May 31, 2023Observed: 1.37 ft at 10:42PM May 31, 2023Observed: 1.35 ft at 10:48PM May 31, 2023Observed: 1.33 ft at 10:54PM May 31, 2023Observed: 1.31 ft at 11:00PM May 31, 2023Observed: 1.28 ft at 11:06PM May 31, 2023Observed: 1.27 ft at 11:12PM May 31, 2023Observed: 1.24 ft at 11:18PM May 31, 2023Observed: 1.22 ft at 11:24PM May 31, 2023Observed: 1.2 ft at 11:30PM May 31, 2023Observed: 1.18 ft at 11:36PM May 31, 2023Observed: 1.16 ft at 11:42PM May 31, 2023Observed: 1.13 ft at 11:48PM May 31, 2023Observed: 1.12 ft at 11:54PM May 31, 2023Observed: 1.09 ft at 12:00AM Jun 01, 2023Observed: 1.07 ft at 12:06AM Jun 01, 2023Observed: 1.05 ft at 12:12AM Jun 01, 2023Observed: 1.02 ft at 12:18AM Jun 01, 2023Observed: 1 ft at 12:24AM Jun 01, 2023Observed: 0.98 ft at 12:30AM Jun 01, 2023Observed: 0.96 ft at 12:36AM Jun 01, 2023Observed: 0.94 ft at 12:42AM Jun 01, 2023Observed: 0.91 ft at 12:48AM Jun 01, 2023Observed: 0.9 ft at 12:54AM Jun 01, 2023Observed: 0.87 ft at 1:00AM Jun 01, 2023Observed: 0.85 ft at 1:06AM Jun 01, 2023Observed: 0.84 ft at 1:12AM Jun 01, 2023Observed: 0.82 ft at 1:18AM Jun 01, 2023Observed: 0.79 ft at 1:24AM Jun 01, 2023Observed: 0.77 ft at 1:30AM Jun 01, 2023Observed: 0.76 ft at 1:36AM Jun 01, 2023Observed: 0.73 ft at 1:42AM Jun 01, 2023Observed: 0.71 ft at 1:48AM Jun 01, 2023Observed: 0.7 ft at 1:54AM Jun 01, 2023Observed: 0.68 ft at 2:00AM Jun 01, 2023Observed: 0.66 ft at 2:06AM Jun 01, 2023Observed: 0.65 ft at 2:12AM Jun 01, 2023Observed: 0.63 ft at 2:18AM Jun 01, 2023Observed: 0.61 ft at 2:24AM Jun 01, 2023Observed: 0.59 ft at 2:30AM Jun 01, 2023Observed: 0.58 ft at 2:36AM Jun 01, 2023Observed: 0.56 ft at 2:42AM Jun 01, 2023Observed: 0.55 ft at 2:48AM Jun 01, 2023Observed: 0.51 ft at 2:49AM Jun 01, 2023Observed: 0.54 ft at 2:54AM Jun 01, 2023Observed: 0.5 ft at 2:55AM Jun 01, 2023Observed: 0.53 ft at 3:00AM Jun 01, 2023Observed: 0.51 ft at 3:06AM Jun 01, 2023Observed: 0.5 ft at 3:12AM Jun 01, 2023Observed: 0.49 ft at 3:18AM Jun 01, 2023Observed: 0.48 ft at 3:24AM Jun 01, 2023Observed: 0.47 ft at 3:30AM Jun 01, 2023Observed: 0.47 ft at 3:36AM Jun 01, 2023Observed: 0.46 ft at 3:42AM Jun 01, 2023Observed: 0.46 ft at 3:48AM Jun 01, 2023Observed: 0.46 ft at 3:54AM Jun 01, 2023Observed: 0.47 ft at 4:00AM Jun 01, 2023Observed: 0.47 ft at 4:06AM Jun 01, 2023Observed: 0.47 ft at 4:12AM Jun 01, 2023Observed: 0.48 ft at 4:18AM Jun 01, 2023Observed: 0.49 ft at 4:24AM Jun 01, 2023Observed: 0.49 ft at 4:30AM Jun 01, 2023Observed: 0.51 ft at 4:36AM Jun 01, 2023Observed: 0.53 ft at 4:42AM Jun 01, 2023Observed: 0.54 ft at 4:48AM Jun 01, 2023Observed: 0.56 ft at 4:54AM Jun 01, 2023Observed: 0.57 ft at 5:00AM Jun 01, 2023Observed: 0.59 ft at 5:06AM Jun 01, 2023Observed: 0.61 ft at 5:12AM Jun 01, 2023Observed: 0.63 ft at 5:18AM Jun 01, 2023Observed: 0.66 ft at 5:24AM Jun 01, 2023Observed: 0.68 ft at 5:30AM Jun 01, 2023Observed: 0.69 ft at 5:36AM Jun 01, 2023Observed: 0.7 ft at 5:42AM Jun 01, 2023Observed: 0.72 ft at 5:48AM Jun 01, 2023Observed: 0.74 ft at 5:54AM Jun 01, 2023Observed: 0.76 ft at 6:00AM Jun 01, 2023Observed: 0.79 ft at 6:06AM Jun 01, 2023Observed: 0.8 ft at 6:12AM Jun 01, 2023Observed: 0.83 ft at 6:18AM Jun 01, 2023Observed: 0.85 ft at 6:24AM Jun 01, 2023Observed: 0.87 ft at 6:30AM Jun 01, 2023Observed: 0.89 ft at 6:36AM Jun 01, 2023Observed: 0.92 ft at 6:42AM Jun 01, 2023Observed: 0.94 ft at 6:48AM Jun 01, 2023Observed: 0.96 ft at 6:54AM Jun 01, 2023Observed: 0.98 ft at 7:00AM Jun 01, 2023Observed: 1.01 ft at 7:06AM Jun 01, 2023Observed: 1.04 ft at 7:12AM Jun 01, 2023Observed: 1.06 ft at 7:18AM Jun 01, 2023Observed: 1.08 ft at 7:24AM Jun 01, 2023Observed: 1.1 ft at 7:30AM Jun 01, 2023Observed: 1.11 ft at 7:36AM Jun 01, 2023Observed: 1.13 ft at 7:42AM Jun 01, 2023Observed: 1.15 ft at 7:48AM Jun 01, 2023Observed: 1.17 ft at 7:54AM Jun 01, 2023Observed: 1.19 ft at 8:00AM Jun 01, 2023Observed: 1.21 ft at 8:06AM Jun 01, 2023Observed: 1.22 ft at 8:12AM Jun 01, 2023Observed: 1.23 ft at 8:18AM Jun 01, 2023Observed: 1.24 ft at 8:24AM Jun 01, 2023Observed: 1.26 ft at 8:30AM Jun 01, 2023Observed: 1.27 ft at 8:36AM Jun 01, 2023Observed: 1.27 ft at 8:42AM Jun 01, 2023Observed: 1.29 ft at 8:48AM Jun 01, 2023Observed: 1.29 ft at 8:49AM Jun 01, 2023Observed: 1.3 ft at 8:54AM Jun 01, 2023Observed: 1.29 ft at 8:55AM Jun 01, 2023Observed: 1.3 ft at 9:00AM Jun 01, 2023Observed: 1.29 ft at 9:06AM Jun 01, 2023Observed: 1.29 ft at 9:12AM Jun 01, 2023Observed: 1.29 ft at 9:18AM Jun 01, 2023Observed: 1.29 ft at 9:24AM Jun 01, 2023Observed: 1.27 ft at 9:30AM Jun 01, 2023Observed: 1.27 ft at 9:36AM Jun 01, 2023Observed: 1.29 ft at 9:42AM Jun 01, 2023Observed: 1.26 ft at 9:48AM Jun 01, 2023Observed: 1.24 ft at 9:54AM Jun 01, 2023Observed: 1.22 ft at 10:00AM Jun 01, 2023Observed: 1.21 ft at 10:06AM Jun 01, 2023Observed: 1.2 ft at 10:12AM Jun 01, 2023Observed: 1.18 ft at 10:18AM Jun 01, 2023Observed: 1.16 ft at 10:24AM Jun 01, 2023Observed: 1.15 ft at 10:30AM Jun 01, 2023Observed: 1.12 ft at 10:36AM Jun 01, 2023Observed: 1.11 ft at 10:42AM Jun 01, 2023Observed: 1.1 ft at 10:48AM Jun 01, 2023Observed: 1.09 ft at 10:54AM Jun 01, 2023Observed: 1.05 ft at 11:00AM Jun 01, 2023Observed: 1.05 ft at 11:06AM Jun 01, 2023Observed: 1.03 ft at 11:12AM Jun 01, 2023Observed: 1 ft at 11:18AM Jun 01, 2023Observed: 0.98 ft at 11:24AM Jun 01, 2023Observed: 0.96 ft at 11:30AM Jun 01, 2023Observed: 0.94 ft at 11:36AM Jun 01, 2023Observed: 0.92 ft at 11:42AM Jun 01, 2023Observed: 0.91 ft at 11:48AM Jun 01, 2023Observed: 0.89 ft at 11:54AM Jun 01, 2023Observed: 0.85 ft at 12:00PM Jun 01, 2023Observed: 0.83 ft at 12:06PM Jun 01, 2023Observed: 0.8 ft at 12:12PM Jun 01, 2023Observed: 0.79 ft at 12:18PM Jun 01, 2023Observed: 0.78 ft at 12:24PM Jun 01, 2023Observed: 0.75 ft at 12:30PM Jun 01, 2023Observed: 0.72 ft at 12:36PM Jun 01, 2023Observed: 0.7 ft at 12:42PM Jun 01, 2023Observed: 0.68 ft at 12:48PM Jun 01, 2023Observed: 0.66 ft at 12:54PM Jun 01, 2023Observed: 0.64 ft at 1:00PM Jun 01, 2023Observed: 0.61 ft at 1:06PM Jun 01, 2023Observed: 0.61 ft at 1:12PM Jun 01, 2023Observed: 0.59 ft at 1:18PM Jun 01, 2023Observed: 0.57 ft at 1:24PM Jun 01, 2023Observed: 0.56 ft at 1:30PM Jun 01, 2023Observed: 0.54 ft at 1:36PM Jun 01, 2023Observed: 0.52 ft at 1:42PM Jun 01, 2023Observed: 0.49 ft at 1:48PM Jun 01, 2023Observed: 0.48 ft at 1:54PM Jun 01, 2023Observed: 0.46 ft at 2:00PM Jun 01, 2023Observed: 0.45 ft at 2:06PM Jun 01, 2023Observed: 0.43 ft at 2:12PM Jun 01, 2023Observed: 0.43 ft at 2:18PM Jun 01, 2023Observed: 0.42 ft at 2:24PM Jun 01, 2023Observed: 0.41 ft at 2:30PM Jun 01, 2023Observed: 0.39 ft at 2:36PM Jun 01, 2023Observed: 0.38 ft at 2:42PM Jun 01, 2023Observed: 0.37 ft at 2:48PM Jun 01, 2023Observed: 0.36 ft at 2:49PM Jun 01, 2023Observed: 0.37 ft at 2:54PM Jun 01, 2023Observed: 0.34 ft at 2:55PM Jun 01, 2023Observed: 0.34 ft at 3:00PM Jun 01, 2023Observed: 0.36 ft at 3:06PM Jun 01, 2023Observed: 0.34 ft at 3:12PM Jun 01, 2023Observed: 0.33 ft at 3:18PM Jun 01, 2023Observed: 0.35 ft at 3:24PM Jun 01, 2023Observed: 0.33 ft at 3:30PM Jun 01, 2023Observed: 0.35 ft at 3:36PM Jun 01, 2023Observed: 0.51 ft at 4:42PM Jun 01, 2023Observed: 0.53 ft at 4:48PM Jun 01, 2023Observed: 0.55 ft at 4:54PM Jun 01, 2023Observed: 0.58 ft at 5:00PM Jun 01, 2023Observed: 0.59 ft at 5:06PM Jun 01, 2023Observed: 0.6 ft at 5:12PM Jun 01, 2023Observed: 0.64 ft at 5:18PM Jun 01, 2023Observed: 0.65 ft at 5:24PM Jun 01, 2023Observed: 0.68 ft at 5:30PM Jun 01, 2023Observed: 0.69 ft at 5:36PM Jun 01, 2023Observed: 0.72 ft at 5:42PM Jun 01, 2023Observed: 0.76 ft at 5:48PM Jun 01, 2023Observed: 0.79 ft at 5:54PM Jun 01, 2023Observed: 0.81 ft at 6:00PM Jun 01, 2023Observed: 0.84 ft at 6:06PM Jun 01, 2023Observed: 0.87 ft at 6:12PM Jun 01, 2023Observed: 0.89 ft at 6:18PM Jun 01, 2023Observed: 0.92 ft at 6:24PM Jun 01, 2023Observed: 0.96 ft at 6:30PM Jun 01, 2023Observed: 1 ft at 6:36PM Jun 01, 2023Observed: 1.03 ft at 6:42PM Jun 01, 2023Observed: 1.04 ft at 6:48PM Jun 01, 2023Observed: 1.08 ft at 6:54PM Jun 01, 2023Observed: 1.11 ft at 7:00PM Jun 01, 2023Observed: 1.14 ft at 7:06PM Jun 01, 2023Observed: 1.17 ft at 7:12PM Jun 01, 2023Observed: 1.2 ft at 7:18PM Jun 01, 2023Observed: 1.24 ft at 7:24PM Jun 01, 2023Observed: 1.26 ft at 7:30PM Jun 01, 2023Observed: 1.29 ft at 7:36PM Jun 01, 2023Observed: 1.33 ft at 7:42PM Jun 01, 2023Observed: 1.36 ft at 7:48PM Jun 01, 2023Observed: 1.39 ft at 7:54PM Jun 01, 2023Observed: 1.4 ft at 8:00PM Jun 01, 2023Observed: 1.43 ft at 8:06PM Jun 01, 2023Observed: 1.46 ft at 8:12PM Jun 01, 2023Observed: 1.49 ft at 8:18PM Jun 01, 2023Observed: 1.5 ft at 8:24PM Jun 01, 2023Observed: 1.53 ft at 8:30PM Jun 01, 2023Observed: 1.56 ft at 8:36PM Jun 01, 2023Observed: 1.57 ft at 8:42PM Jun 01, 2023Observed: 1.6 ft at 8:48PM Jun 01, 2023Observed: 1.67 ft at 8:49PM Jun 01, 2023Observed: 1.63 ft at 8:54PM Jun 01, 2023Observed: 1.69 ft at 8:55PM Jun 01, 2023Observed: 1.65 ft at 9:00PM Jun 01, 2023Observed: 1.67 ft at 9:06PM Jun 01, 2023Observed: 1.69 ft at 9:12PM Jun 01, 2023Observed: 1.71 ft at 9:18PM Jun 01, 2023Observed: 1.73 ft at 9:24PM Jun 01, 2023Observed: 1.74 ft at 9:30PM Jun 01, 2023Observed: 1.75 ft at 9:36PM Jun 01, 2023Observed: 1.75 ft at 9:42PM Jun 01, 2023Observed: 1.76 ft at 9:48PM Jun 01, 2023Observed: 1.77 ft at 9:54PM Jun 01, 2023Observed: 1.77 ft at 10:00PM Jun 01, 2023Highest Observation: 1.78 ft at 10:06PM Jun 01, 2023Observed: 1.77 ft at 10:12PM Jun 01, 2023Observed: 1.76 ft at 10:18PM Jun 01, 2023Observed: 1.75 ft at 10:24PM Jun 01, 2023Observed: 1.73 ft at 10:30PM Jun 01, 2023Observed: 1.72 ft at 10:36PM Jun 01, 2023Observed: 1.7 ft at 10:42PM Jun 01, 2023Observed: 1.69 ft at 10:48PM Jun 01, 2023Observed: 1.67 ft at 10:54PM Jun 01, 2023Observed: 1.65 ft at 11:00PM Jun 01, 2023Observed: 1.63 ft at 11:06PM Jun 01, 2023Observed: 1.61 ft at 11:12PM Jun 01, 2023Observed: 1.59 ft at 11:18PM Jun 01, 2023Observed: 1.57 ft at 11:24PM Jun 01, 2023Observed: 1.55 ft at 11:30PM Jun 01, 2023Observed: 1.52 ft at 11:36PM Jun 01, 2023Observed: 1.5 ft at 11:42PM Jun 01, 2023Observed: 1.49 ft at 11:48PM Jun 01, 2023Observed: 1.47 ft at 11:54PM Jun 01, 2023Observed: 1.44 ft at 12:00AM Jun 02, 2023Observed: 1.42 ft at 12:06AM Jun 02, 2023Observed: 1.4 ft at 12:12AM Jun 02, 2023Observed: 1.37 ft at 12:18AM Jun 02, 2023Observed: 1.35 ft at 12:24AM Jun 02, 2023Observed: 1.34 ft at 12:30AM Jun 02, 2023Observed: 1.31 ft at 12:36AM Jun 02, 2023Observed: 1.29 ft at 12:42AM Jun 02, 2023Observed: 1.26 ft at 12:48AM Jun 02, 2023Observed: 1.24 ft at 12:54AM Jun 02, 2023Observed: 1.21 ft at 1:00AM Jun 02, 2023Observed: 1.19 ft at 1:06AM Jun 02, 2023Observed: 1.17 ft at 1:12AM Jun 02, 2023Observed: 1.15 ft at 1:18AM Jun 02, 2023Observed: 1.12 ft at 1:24AM Jun 02, 2023Observed: 1.1 ft at 1:30AM Jun 02, 2023Observed: 1.07 ft at 1:36AM Jun 02, 2023Observed: 1.06 ft at 1:42AM Jun 02, 2023Observed: 1.03 ft at 1:48AM Jun 02, 2023Observed: 1 ft at 1:54AM Jun 02, 2023Observed: 0.99 ft at 2:00AM Jun 02, 2023Observed: 0.96 ft at 2:06AM Jun 02, 2023Observed: 0.94 ft at 2:12AM Jun 02, 2023Observed: 0.93 ft at 2:18AM Jun 02, 2023Observed: 0.91 ft at 2:24AM Jun 02, 2023Observed: 0.88 ft at 2:30AM Jun 02, 2023Observed: 0.86 ft at 2:36AM Jun 02, 2023Observed: 0.85 ft at 2:42AM Jun 02, 2023Observed: 0.82 ft at 2:48AM Jun 02, 2023Observed: 0.77 ft at 2:50AM Jun 02, 2023Observed: 0.81 ft at 2:54AM Jun 02, 2023Observed: 0.75 ft at 2:56AM Jun 02, 2023Observed: 0.78 ft at 3:00AM Jun 02, 2023Observed: 0.77 ft at 3:06AM Jun 02, 2023Observed: 0.75 ft at 3:12AM Jun 02, 2023Observed: 0.74 ft at 3:18AM Jun 02, 2023Observed: 0.73 ft at 3:24AM Jun 02, 2023Observed: 0.7 ft at 3:30AM Jun 02, 2023Observed: 0.69 ft at 3:36AM Jun 02, 2023Observed: 0.67 ft at 3:42AM Jun 02, 2023Observed: 0.66 ft at 3:48AM Jun 02, 2023Observed: 0.65 ft at 3:54AM Jun 02, 2023Observed: 0.65 ft at 4:00AM Jun 02, 2023Observed: 0.63 ft at 4:06AM Jun 02, 2023Observed: 0.62 ft at 4:12AM Jun 02, 2023Observed: 0.6 ft at 4:18AM Jun 02, 2023Observed: 0.6 ft at 4:24AM Jun 02, 2023Observed: 0.6 ft at 4:30AM Jun 02, 2023Observed: 0.6 ft at 4:36AM Jun 02, 2023USGS--Water Resources of the United StatesSAYN6(plotting HMIRG) Graph Created (5:01AM Jun 2, 2023)ObservedLatest observed value: 0.6 ft at 4:36 AM EDT 2-Jun-2023. Flood Stage is 3 ft
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Reliability of the Forecast: Forecast data shown here are guidance values only. Please refer to your local NWS office.

NOTE: Graphical forecasts are not available for the Great South Bay at West Sayville (IN MLLW). During times of high water, forecast crest information can be found in the text products.

Vertical Datum references a tidal datum (MLLW). For more information click on USGS link below.

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Flood Categories (in feet)
Major Flood Stage: 4
Moderate Flood Stage: 3.5
Flood Stage: 3
Action Stage: 0
Low Stage (in feet): -1.8

Historic Crests
Currently none available.

Recent Crests
Currently none available.

Low Water Records
Currently none available.
Zoom Level:16
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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
13.1 Inundation of one to three feet of water on the runways at LaGuardia Airport.
12.7 Inundation of one to two feet on taxiways at LaGuardia Airport and in Douglaston Park.
10.8 Inundation occurs on the FDR Drive in Manhattan. Elevated water levels on the East River force the water into catch basins and storm sewers and cause water to bubble and pour out of manholes on the northbound FDR Drive leading to road closures in the upper 80's and lower 90's. In Rye, inundation causes portions of Milton Road and Kirby Lane at the Tide Mill Basin to close.
10.2 Minor coastal flooding in Port Washington along Shore Road, Sector Drive, and Sunset Park on Main Street.
10 Milton Road and Kirby Lane in Rye close during high tide.
About This Location Collapse

Latitude: 40.720833° N, Longitude: 73.091111° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 3 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 Not Available Not Available 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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