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Nantucket Sound Marine Forecast

Updated 1:04pm EDT Apr 1, 2026
Zone Map
Small Craft Advisory In Effect Until 7 Pm Edt This Evening
This Afternoon
SW winds 15 to 20 kt. Seas 3 to 5 ft. Wave Detail: SW 3 ft at 4 seconds and SW 2 ft at 9 seconds. Rain likely.
Tonight
NE 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: NE 3 ft at 4 seconds and W 2 ft at 3 seconds. Rain. Patchy fog after midnight with vsby 1 to 3 NM.
Thu
NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: NE 3 ft at 4 seconds and S 1 foot at 7 seconds. Patchy fog. Rain in the morning. A chance of rain in the afternoon. Vsby 1 to 3 NM.
Thu Night
E winds 15 to 20 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: E 3 ft at 5 seconds and S 1 foot at 7 seconds. Patchy fog in the evening.
Fri And Fri Night
SW winds 15 to 20 kt with gusts up to 25 kt.
Sat And Sat Night
SW winds 10 to 15 kt, becoming SE 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 4 seconds and E 2 ft at 6 seconds.
Sun
S winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. A chance of showers.
Sun Night
SW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. Showers likely.