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20NM W Hyannis MA

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 3:22 am EDT Oct 9, 2025
Forecast Valid: 3am EDT Oct 9, 2025-6pm EDT Oct 15, 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

Thursday

N wind 17 to 19 kt, with gusts as high as 26 kt. Sunny. Seas around 3 ft.

Thursday Night

N wind around 10 kt. Clear. Seas around 1 ft.

Friday

Variable winds less than 5 kt becoming SSW 5 to 7 kt in the afternoon. Sunny. Seas around 1 ft.

Friday Night

SW wind 7 to 9 kt. Mostly clear. Seas around 1 ft.

Saturday

Variable winds less than 5 kt becoming S 5 to 8 kt in the afternoon. Mostly sunny. Seas around 1 ft.

Saturday Night

SE wind 8 to 11 kt becoming ENE after midnight. A slight chance of showers after 1am. Seas around 1 ft.

Sunday

ENE wind 17 to 22 kt increasing to 24 to 29 kt in the afternoon. Winds could gust as high as 35 kt. A chance of showers. Seas around 3 ft.

Sunday Night

ENE wind 32 to 35 kt. Showers likely. Seas around 3 ft.

Columbus Day

ENE wind 34 to 36 kt, with gusts as high as 43 kt. Showers likely. Seas around 4 ft.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.