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Cape Cod Bay Marine Forecast

Updated 7:05pm EDT Jun 20, 2026
Zone Map
Tonight
W winds 5 to 10 kt. Gusts up to 20 kt this evening.
Sun
SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: N 1 foot at 4 seconds and S 1 foot at 9 seconds, becoming W 1 foot at 3 seconds and N 1 foot at 4 seconds.
Sun Night
SW winds 5 to 10 kt, becoming W after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 4 seconds.
Mon
W winds around 5 kt, becoming S in the afternoon. Seas 1 foot or less, then 2 to 3 ft in the afternoon. Wave Detail: W 1 foot at 3 seconds and NE 1 foot at 4 seconds, becoming SE 1 foot at 3 seconds and SW 1 foot at 3 seconds. A chance of showers in the afternoon.
Mon Night
SE winds 5 to 10 kt, becoming S 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds and S 2 ft at 3 seconds. Showers.
Tue
SW winds 10 to 15 kt, becoming NW in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds.
Tue Night
NW winds around 5 kt. Seas around 2 ft.
Wed Through Thu Night
S winds 5 to 10 kt. Seas around 2 ft.