| 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: 403 AM EST Wed Nov 5 2025 | |
Today: W winds 10 to 15 kt with gusts up to 20 kt, becoming SW 25 to 30 kt with gusts up to 35 kt this afternoon. Seas 3 to 4 ft, building to 4 to 6 ft this afternoon. Wave detail: W 3 ft at 6 seconds and SE 1 foot at 9 seconds, becoming SW 6 ft at 6 seconds and SE 1 foot at 10 seconds. Tonight: SW winds 25 to 30 kt, becoming W around 35 kt after midnight. Gusts up to 55 kt. Seas 10 to 14 ft, building to 13 to 18 ft after midnight. Wave detail: SW 12 ft at 8 seconds and SE 1 foot at 12 seconds, becoming W 13 ft at 9 seconds and S 4 ft at 11 seconds. A chance of showers. Thu: NW winds 25 to 35 kt. Gusts up to 50 kt in the morning. Seas 10 to 14 ft, subsiding to 7 to 10 ft in the afternoon. Wave detail: NW 12 ft at 8 seconds and SW 5 ft at 11 seconds, becoming NW 9 ft at 8 seconds and S 3 ft at 11 seconds. Thu Night: NW winds 20 to 25 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 5 to 7 ft, subsiding to 3 to 5 ft after midnight. Wave detail: NW 7 ft at 7 seconds and S 3 ft at 11 seconds, becoming NW 5 ft at 7 seconds and SE 1 foot at 11 seconds. Fri: SW winds 10 to 15 kt, increasing to 20 to 25 kt in the afternoon. Seas 2 to 3 ft, building to 4 to 6 ft in the afternoon. Wave detail: SW 3 ft at 7 seconds and SE 1 foot at 11 seconds, becoming SW 6 ft at 6 seconds and SE 1 foot at 11 seconds. Fri Night: SW winds 25 to 30 kt. Seas 7 to 10 ft. Wave detail: SW 10 ft at 7 seconds and SE 1 foot at 11 seconds. A chance of rain in the evening, then rain likely after midnight. Sat: SW winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to 9 ft. Rain likely. Sat Night: W winds 10 to 15 kt. Seas 4 to 6 ft. Sun: SE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. A chance of rain. Sun Night: SW winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Rain likely. 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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