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20NM E Hyannis MA

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 1:49 pm EDT Aug 17, 2026
Forecast Valid: 8pm EDT Aug 17, 2026-6pm EDT Aug 24, 2026

Tonight

SE wind 6 to 11 kt becoming ENE after midnight. A chance of showers, mainly before 9pm. Patchy fog. Seas around 2 ft.

Tuesday

N wind 7 to 9 kt. Patchy fog before 11am. Seas 2 to 3 ft.

Tuesday Night

Variable winds 5 kt or less. Patchy fog. Seas 2 to 3 ft.

Wednesday

Variable winds less than 5 kt becoming S 5 to 8 kt in the afternoon. Patchy fog before 9am. Seas around 2 ft.

Wednesday Night

WSW wind around 10 kt. Partly cloudy. Seas around 2 ft.

Thursday

WSW wind around 7 kt. A slight chance of showers after 2pm. Seas around 2 ft.

Thursday Night

SSW wind around 6 kt becoming WNW after midnight. A chance of showers. Seas around 2 ft.

Friday

ENE wind 7 to 9 kt. A chance of showers. Seas around 2 ft.

Friday Night

E wind around 6 kt. A chance of showers. 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.