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20NM SW Hyannis MA

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 10:13 am EST Nov 13, 2026
Forecast Valid: 10am EST Nov 13, 2026-6pm EST Nov 19, 2026

...GALE WARNING IN EFFECT UNTIL 7 PM EST THIS EVENING...

Today

NNE wind 18 to 21 kt, with gusts as high as 37 kt. A chance of rain, mainly after 1pm. Seas around 3 ft.

Tonight

N wind 13 to 15 kt, with gusts as high as 31 kt. Mostly cloudy. Seas around 3 ft.

Saturday

NW wind 11 to 14 kt. Increasing clouds. Seas around 2 ft.

Saturday Night

WNW wind around 15 kt. Mostly cloudy, then gradually becoming mostly clear. Seas around 2 ft.

Sunday

NW wind 13 to 15 kt, with gusts as high as 22 kt. Sunny. Seas around 3 ft.

Sunday Night

NNW wind 12 to 14 kt, with gusts as high as 20 kt. Mostly clear. Seas 2 to 3 ft.

Monday

NNW wind 9 to 12 kt decreasing to 6 to 9 kt in the afternoon. Sunny. Seas 1 to 2 ft.

Monday Night

NW wind around 7 kt. Mostly clear. Seas around 1 ft.

Tuesday

WNW wind 7 to 9 kt becoming W in the afternoon. Sunny. Seas 1 to 2 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.