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Hazardous Weather Conditions
Last Update: 706 PM EST Mon Dec 29 2025
For More Weather Information:
20NM W Hyannis MA
Marine Zone Forecast
...GALE WARNING IN EFFECT THROUGH WEDNESDAY MORNING...
Tonight
W winds 25 to 30 kt with gusts up to 40 kt. Seas 4 to 6 ft. Wave detail: SW 6 ft at 9 seconds and W 4 ft at 5 seconds. A chance of rain this evening.
Tue
W winds 25 to 30 kt with gusts up to 40 kt. Seas 4 to 6 ft. Wave detail: SW 6 ft at 9 seconds and W 4 ft at 5 seconds.
Tue Night
W winds 25 to 30 kt with gusts up to 40 kt. Seas 4 to 6 ft. Wave detail: SW 6 ft at 9 seconds and W 4 ft at 5 seconds. Light freezing spray.
Wed
W winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Seas 2 to 4 ft. Wave detail: SW 4 ft at 8 seconds and W 3 ft at 5 seconds.
Wed Night
W winds 15 to 20 kt. Seas 3 to 5 ft. Wave detail: SW 4 ft at 7 seconds and W 2 ft at 4 seconds. A chance of snow. Vsby 1 to 3 nm after midnight.
Thu
NW winds 15 to 20 kt. Seas 2 to 4 ft. Wave detail: SW 4 ft at 8 seconds and NW 2 ft at 4 seconds. A chance of snow. A chance of light freezing spray in the morning.
Thu Night
NW winds 15 to 20 kt, becoming W 10 to 15 kt after midnight. Seas 2 to 3 ft.
Fri Through Sat Night
NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft.
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.
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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