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NWS Forecast for: Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island (ANZ256) Issued by: National Weather Service Norton, MA Last Update: 1003 AM EDT Thu Jul 17 2025 | ![]() |
This Afternoon: SW winds 10 to 15 kt, increasing to 15 to 20 kt. Gusts up to 25 kt. Seas 3 to 5 ft. Wave detail: SE 4 ft at 7 seconds. A slight chance of showers with isolated tstms. Tonight: SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave detail: S 5 ft at 7 seconds. Areas of fog. Vsby 1 to 3 nm in the evening. Fri: NW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt in the afternoon. Seas 3 to 5 ft. Wave detail: SW 5 ft at 7 seconds and E 1 foot at 10 seconds. Fri Night: S winds 5 to 10 kt. Seas 3 to 4 ft. Wave detail: SW 3 ft at 7 seconds and E 1 foot at 10 seconds. Sat: S winds 10 to 15 kt. Seas 2 to 3 ft. Wave detail: S 3 ft at 7 seconds and E 1 foot at 10 seconds. Sat Night: S winds 10 to 15 kt, becoming SW 15 to 20 kt after midnight. Seas 2 to 3 ft. Wave detail: S 3 ft at 5 seconds and SE 1 foot at 9 seconds. A chance of showers after midnight with vsby 1 to 3 nm. Sun: SW winds 15 to 20 kt with gusts up to 25 kt. Seas around 3 ft. A chance of showers and tstms. Vsby 1 to 3 nm. Sun Night: NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. Mon And Mon Night: NE winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 3 ft. winds and seas higher in and near tstms. seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. | |
Zone Forecast: Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island (ANZ256) | |
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