| 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: 405 PM EDT Thu Aug 13 2026 |  |
| Tonight: W winds 5 to 10 kt. Seas 2 to 3 ft. Wave detail: W 2 ft at 4 seconds and NE 1 foot at 5 seconds. Fri: NW winds 5 to 10 kt, becoming W in the afternoon. Seas around 2 ft. Wave detail: SW 2 ft at 5 seconds and N 1 foot at 3 seconds. Fri Night: W winds 5 to 10 kt, becoming N 10 to 15 kt after midnight. Seas around 2 ft. Wave detail: SW 2 ft at 4 seconds and N 1 foot at 2 seconds. Sat: NE winds 5 to 10 kt. Seas around 2 ft. Wave detail: N 2 ft at 3 seconds and S 1 foot at 6 seconds. Sat Night And Sun: S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave detail: S 3 ft at 4 seconds and NW 1 foot at 2 seconds. Sun Night: S winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft, building to 5 to 7 ft after midnight. Wave detail: SW 4 ft at 5 seconds and SE 2 ft at 13 seconds, becoming S 7 ft at 7 seconds and SE 4 ft at 10 seconds. A chance of tstms. A chance of showers in the evening, then showers likely after midnight. Mon: W winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Showers likely. Mon Night Through Tue Night: S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 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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