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20NM E Hyannis MA

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 3:23 pm EDT Aug 15, 2026
Forecast Valid: 6pm EDT Aug 15, 2026-6pm EDT Aug 22, 2026

Tonight

Variable winds 5 kt or less. Mostly clear. Seas around 1 ft.

Sunday

Variable winds less than 5 kt becoming S 6 to 11 kt in the afternoon. Mostly sunny. Seas 1 to 2 ft.

Sunday Night

S wind 11 to 14 kt. A slight chance of showers after 5am. Seas around 2 ft.

Monday

SSE wind around 18 kt, with gusts as high as 24 kt. Showers likely, mainly after 11am. Seas 3 to 4 ft.

Monday Night

SSE wind 9 to 11 kt becoming NNW after midnight. A chance of showers, mainly before 2am. Seas around 3 ft.

Tuesday

N wind around 10 kt. A slight chance of showers before 7am. Seas around 3 ft.

Tuesday Night

Variable winds 5 kt or less. Partly cloudy. Seas around 2 ft.

Wednesday

WSW wind 5 to 10 kt becoming SSW in the afternoon. Mostly sunny. Seas around 2 ft.

Wednesday Night

SW wind around 10 kt. Partly cloudy. Seas around 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.