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20NM NE Hyannis MA

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 2:39 am EDT Aug 18, 2025
Forecast Valid: 6am EDT Aug 18, 2025-6pm EDT Aug 24, 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM EDT THIS AFTERNOON...

Today

NNE wind 15 to 20 kt, with gusts as high as 28 kt. Mostly cloudy, then gradually becoming sunny. Seas 3 ft building to 5 ft.

Tonight

ENE wind 8 to 10 kt. Mostly clear. Seas 3 to 4 ft.

Tuesday

E wind around 8 kt. Sunny. Seas 2 to 3 ft.

Tuesday Night

E wind 5 to 7 kt becoming SSE after midnight. Partly cloudy. Seas around 2 ft.

Wednesday

ESE wind 6 to 9 kt. Mostly sunny. Seas around 2 ft.

Wednesday Night

E wind around 9 kt. A slight chance of showers after 10pm. Seas 2 to 3 ft.

Thursday

NE wind 11 to 14 kt, with gusts as high as 23 kt. Mostly sunny. Seas 3 to 4 ft.

Thursday Night

NE wind 16 to 19 kt, with gusts as high as 28 kt. Mostly cloudy. Seas 5 to 6 ft.

Friday

NNE wind 17 to 20 kt, with gusts as high as 32 kt. Sunny. Seas 5 to 6 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.