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: 1004 PM EDT Mon Aug 31 2026


Overnight: S winds around 5 kt. Seas around 2 ft. Wave detail: SE 1 foot at 4 seconds and SE 1 foot at 8 seconds. A chance of showers.

Tue: SE winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas around 2 ft. Wave detail: SE 2 ft at 4 seconds and NW 1 foot at 3 seconds. Patchy fog. Showers. Vsby 1 to 3 nm in the morning.

Tue Night: E winds 10 to 15 kt. Seas 2 to 3 ft. Wave detail: SE 3 ft at 4 seconds and SE 3 ft at 8 seconds. Patchy fog in the evening. Showers likely in the evening.

Wed: E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave detail: SE 3 ft at 6 seconds and SE 1 foot at 12 seconds.

Wed Night: SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave detail: S 3 ft at 6 seconds and NE 2 ft at 4 seconds. A chance of showers after midnight.

Thu: S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave detail: S 3 ft at 6 seconds and W 1 foot at 3 seconds. Showers likely. A chance of tstms in the afternoon.

Thu Night: W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. A chance of tstms in the evening.

Fri Through Sat Night: N winds 10 to 15 kt with gusts up to 20 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)

Visit your local NWS office at: https://www.weather.gov/boston