| 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: 404 PM EDT Thu Apr 30 2026 |  |
Tonight: W winds 5 to 10 kt. Seas 4 to 5 ft. Wave detail: E 5 ft at 10 seconds and S 3 ft at 8 seconds. Patchy fog after midnight with vsby 1 nm or less. Fri: NW winds around 10 kt, becoming W in the afternoon. Seas 4 to 5 ft. Wave detail: E 4 ft at 10 seconds and SW 3 ft at 10 seconds. Fri Night: SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 3 to 5 ft. Wave detail: W 3 ft at 4 seconds and SE 3 ft at 9 seconds. Sat: SW winds 5 to 10 kt. Seas around 3 ft. Wave detail: E 3 ft at 9 seconds and SW 2 ft at 5 seconds. Sat Night: S winds 5 to 10 kt, becoming NE after midnight. Seas around 3 ft. Wave detail: E 3 ft at 9 seconds and SW 2 ft at 4 seconds. A chance of showers in the evening, then showers likely after midnight. Sun: N winds 10 to 15 kt, becoming W in the afternoon. Gusts up to 20 kt. Seas 3 to 4 ft. Wave detail: NW 3 ft at 4 seconds and E 3 ft at 9 seconds. Showers likely, mainly in the morning. Sun Night: W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas 3 to 4 ft. Mon: SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Mon Night Through Tue Night: S winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 8 ft. 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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