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Hazardous Weather Conditions
Last Update: 1005 AM EDT Thu Aug 21 2025
For More Weather Information:
8NM S Hyannis MA
Marine Zone Forecast
...GALE WARNING IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH FRIDAY EVENING...
This Afternoon
NE winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave detail: E 5 ft at 6 seconds and S 3 ft at 15 seconds. A slight chance of showers.
Tonight
NE winds 25 to 30 kt, increasing to 30 to 35 kt after midnight. Seas 6 to 9 ft. Wave detail: E 7 ft at 7 seconds and S 3 ft at 17 seconds.
Fri
N winds 25 to 35 kt with gusts up to 40 kt. Seas 6 to 9 ft, subsiding to 5 to 7 ft in the afternoon. Wave detail: N 7 ft at 6 seconds and S 3 ft at 17 seconds, becoming N 6 ft at 6 seconds and S 3 ft at 14 seconds.
Fri Night
N winds 15 to 20 kt with gusts up to 25 kt, becoming W 10 to 15 kt after midnight. Seas 4 to 6 ft. Wave detail: NE 5 ft at 8 seconds and N 3 ft at 5 seconds.
Sat And Sat Night
S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave detail: E 4 ft at 12 seconds and W 2 ft at 3 seconds.
Sun
S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave detail: E 3 ft at 13 seconds and SW 2 ft at 4 seconds.
Sun Night Through Mon Night
SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers.
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.
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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