Hazardous Weather Conditions
Last Update: 404 AM EDT Wed Sep 9 2026
For More Weather Information:
20NM W Hyannis MA
Marine Zone Forecast
...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH THURSDAY MORNING...
Today
S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 25 kt this afternoon. Seas 2 to 4 ft. Wave detail: E 2 ft at 3 seconds and SW 2 ft at 3 seconds.
Tonight
SW winds 15 to 20 kt with gusts up to 30 kt, increasing to 20 to 25 kt with gusts up to 40 kt after midnight. Seas 3 to 4 ft, building to 4 to 6 ft after midnight. Wave detail: SW 4 ft at 5 seconds and E 2 ft at 4 seconds, becoming SW 6 ft at 6 seconds and SE 2 ft at 11 seconds. A chance of showers after midnight.
Thu
SW winds 15 to 20 kt. Gusts up to 40 kt, decreasing to 30 kt in the afternoon. Seas 4 to 6 ft, subsiding to 3 to 4 ft in the afternoon. Wave detail: SW 6 ft at 7 seconds and SE 3 ft at 9 seconds, becoming SW 4 ft at 7 seconds and E 1 foot at 5 seconds. A chance of showers in the morning.
Thu Night
W winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave detail: SW 3 ft at 7 seconds and SE 2 ft at 11 seconds.
Fri
NW winds 5 to 10 kt with gusts up to 20 kt, becoming W in the afternoon. Seas around 2 ft. Wave detail: W 2 ft at 7 seconds and NE 1 foot at 3 seconds.
Fri Night
W winds 5 to 10 kt, becoming N after midnight. Seas 1 foot or less. Wave detail: N 1 foot at 2 seconds and SW 1 foot at 7 seconds.
Sat And Sat Night
SE winds 5 to 10 kt, becoming S. Seas around 2 ft, then 1 foot or less.
Sun And Sun Night
S winds 10 to 15 kt, becoming SW 5 to 10 kt. 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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