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: 405 PM EDT Sat Jun 20 2026
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Tonight: W winds 10 to 15 kt with gusts up to 25 kt, diminishing to around 5 kt after midnight. Seas 2 to 4 ft. Wave detail: S 3 ft at 9 seconds and W 2 ft at 4 seconds.

Sun: W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave detail: S 3 ft at 8 seconds and SW 2 ft at 3 seconds.

Sun Night: SW winds 10 to 15 kt, becoming W around 5 kt after midnight. Seas 2 to 3 ft. Wave detail: S 3 ft at 8 seconds and W 1 foot at 3 seconds.

Mon: SW winds around 5 kt, becoming SE in the afternoon. Seas 2 to 3 ft. Wave detail: S 2 ft at 7 seconds and SW 1 foot at 2 seconds. Showers likely in the afternoon.

Mon Night: S winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave detail: S 4 ft at 5 seconds. Showers. A chance of tstms after midnight.

Tue: SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt in the afternoon. Seas 3 to 5 ft. Wave detail: SW 4 ft at 6 seconds and SE 2 ft at 7 seconds. Showers in the morning. A chance of showers in the afternoon.

Tue Night: NW winds 5 to 10 kt. Seas 2 to 4 ft.

Wed Through Thu Night: S winds 5 to 10 kt. Seas 2 to 3 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: Block Island Sound (ANZ237)

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