Hazardous Weather Conditions
Last Update: 704 PM EDT Tue Jul 21 2026
For More Weather Information:
11NM SW Nantucket MA
Marine Zone Forecast
Tonight
S winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft, building to 6 to 9 ft after midnight. Wave detail: SE 6 ft at 7 seconds and W 1 foot at 7 seconds, becoming S 9 ft at 7 seconds and W 3 ft at 7 seconds. Showers. A slight chance of tstms this evening, then a chance of tstms after midnight. Patchy fog after midnight.
Wed
SW winds 20 to 25 kt with gusts up to 30 kt. Seas 7 to 10 ft. Wave detail: W 9 ft at 7 seconds and E 1 foot at 8 seconds. Patchy fog. Showers likely with a chance of tstms in the morning, then a chance of showers in the afternoon. Vsby 1 nm or less in the morning.
Wed Night
SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 6 to 9 ft. Wave detail: S 9 ft at 9 seconds and SE 3 ft at 10 seconds. Patchy fog. A chance of showers in the evening. Showers likely after midnight. Vsby 1 to 3 nm in the evening.
Thu
N winds around 10 kt, becoming NE in the afternoon. Seas 5 to 7 ft. Wave detail: S 6 ft at 9 seconds and E 2 ft at 11 seconds. Showers likely, mainly in the morning. Patchy fog in the morning.
Thu Night And Fri
E winds 5 to 10 kt. Seas 3 to 5 ft. Wave detail: S 5 ft at 8 seconds and SE 2 ft at 7 seconds.
Fri Night
E winds 5 to 10 kt. Seas 2 to 3 ft. Wave detail: SE 3 ft at 7 seconds and NW 1 foot at 6 seconds.
Sat Through Sun 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.
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.
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.
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