Coastal Waters Forecast for Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island (ANZ256) (Text-Only)
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: 705 AM EST Sat Dec 27 2025
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Today: NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave detail: NE 4 ft at 5 seconds and E 2 ft at 12 seconds. Patchy fog this morning. A chance of snow this morning with vsby 1 nm or less.

Tonight: N winds 15 to 20 kt, becoming NW 10 to 15 kt after midnight. Seas 3 to 5 ft. Wave detail: N 4 ft at 5 seconds and E 2 ft at 12 seconds.

Sun: NW winds 10 to 15 kt. Seas 2 to 3 ft. Wave detail: N 2 ft at 4 seconds and E 2 ft at 12 seconds.

Sun Night: SW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave detail: S 4 ft at 6 seconds and E 2 ft at 12 seconds. A chance of rain in the evening, then rain after midnight with vsby 1 to 3 nm.

Mon: SW winds 20 to 25 kt, increasing to 25 to 30 kt in the afternoon. Seas 5 to 7 ft, building to 7 to 10 ft in the afternoon. Wave detail: SW 7 ft at 6 seconds and E 1 foot at 12 seconds, becoming SW 10 ft at 8 seconds and SW 1 foot at 4 seconds. Rain. Vsby 1 to 3 nm in the morning.

Mon Night: W winds 30 to 40 kt with gusts up to 45 kt. Seas 9 to 13 ft, building to 11 to 15 ft after midnight. Wave detail: SW 12 ft at 9 seconds and W 3 ft at 5 seconds, becoming SW 14 ft at 9 seconds and NW 4 ft at 6 seconds. Rain likely in the evening.

Tue: W winds 30 to 40 kt with gusts up to 45 kt. Seas 10 to 14 ft.

Tue Night: W winds 30 to 40 kt with gusts up to 45 kt. Seas 9 to 13 ft.

Wed: W winds 25 to 30 kt. Seas 7 to 10 ft.

Wed Night: W winds 25 to 30 kt with gusts up to 35 kt. Seas 6 to 9 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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