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20NM E Hyannis MA

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 4:34 am EDT Aug 17, 2026
Forecast Valid: 6am EDT Aug 17, 2026-6pm EDT Aug 23, 2026

Today

S wind 13 to 15 kt becoming SSE in the afternoon. Showers likely, mainly after 2pm. Patchy fog after 2pm. Seas 2 ft building to 4 ft.

Tonight

SE wind 9 to 12 kt becoming NNW 6 to 9 kt after midnight. A chance of showers and thunderstorms, mainly before 1am. Patchy fog. Seas 2 to 3 ft.

Tuesday

NNW wind 9 to 11 kt. Patchy fog before 10am. Seas 2 to 3 ft.

Tuesday Night

Variable winds 5 kt or less. Mostly cloudy. Seas 2 to 3 ft.

Wednesday

Variable winds less than 5 kt becoming S 5 to 8 kt in the morning. Mostly sunny. Seas around 2 ft.

Wednesday Night

SW wind around 10 kt. Mostly clear. Seas around 2 ft.

Thursday

WSW wind around 8 kt becoming NE in the afternoon. Mostly sunny. 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 around 9 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.