Coastal Waters Forecast for Block Island Sound (ANZ237) (Text-Only)
NWS Forecast for: Block Island Sound (ANZ237)
Issued by: National Weather Service Norton, MA
Last Update: 104 AM EDT Fri May 1 2026


Rest Of Tonight: NW winds around 10 kt. Seas 2 to 4 ft. Wave detail: SE 3 ft at 10 seconds and NW 1 foot at 2 seconds.

Fri: NW winds around 10 kt, becoming SW in the afternoon. Seas 2 to 4 ft. Wave detail: SE 3 ft at 10 seconds and W 2 ft at 3 seconds.

Fri Night: SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave detail: SE 3 ft at 9 seconds and SW 2 ft at 3 seconds.

Sat: SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave detail: SE 2 ft at 9 seconds and SW 1 foot at 5 seconds. A chance of showers in the afternoon.

Sat Night: S winds 5 to 10 kt, becoming N after midnight. Seas 2 to 3 ft. Wave detail: SE 2 ft at 9 seconds and S 1 foot at 4 seconds. A chance of showers in the evening, then showers likely after midnight.

Sun: NW winds around 10 kt, becoming W in the afternoon. Seas 2 to 3 ft. Wave detail: NW 2 ft at 3 seconds and SE 2 ft at 9 seconds. A chance of showers.

Sun Night: W winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft.

Mon: SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft.

Mon Night: SW winds around 20 kt with gusts up to 30 kt. Seas 3 to 5 ft.

Tue And Tue Night: SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 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: Block Island Sound (ANZ237)

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