Hazardous Weather Conditions
Last Update: 104 PM EDT Tue Jul 21 2026
For More Weather Information:
11NM SW Nantucket MA
Marine Zone Forecast
This Afternoon
SE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave detail: SW 3 ft at 5 seconds and SE 1 foot at 9 seconds. A chance of showers.
Tonight
S winds 20 to 25 kt, becoming SW 25 to 30 kt after midnight. 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 NW 2 ft at 7 seconds. Showers with a chance of tstms.
Wed
SW winds 25 to 30 kt, diminishing to 20 to 25 kt in the afternoon. Seas 7 to 10 ft. Wave detail: SW 10 ft at 7 seconds and E 1 foot at 8 seconds. Showers with a chance of tstms in the morning, then a chance of showers in the afternoon.
Wed Night
SW winds 20 to 25 kt, becoming W 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 6 to 9 ft. Wave detail: S 9 ft at 9 seconds and W 1 foot at 7 seconds. A chance of showers in the evening. Showers likely after midnight.
Thu
N winds around 10 kt, becoming NE in the afternoon. Seas 6 to 9 ft, subsiding to 5 to 7 ft in the afternoon. Wave detail: S 7 ft at 9 seconds and NW 1 foot at 4 seconds, becoming S 6 ft at 8 seconds and N 1 foot at 7 seconds. A chance of showers.
Thu Night
E winds 5 to 10 kt, becoming NE after midnight. Seas 4 to 6 ft. Wave detail: S 5 ft at 8 seconds and E 1 foot at 7 seconds. A chance of showers in the evening.
Fri Through Sat Night
E winds 5 to 10 kt. Seas 2 to 4 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.
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