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20NM E Hyannis MA

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 1:04 am EDT Aug 4, 2026
Forecast Valid: 6am EDT Aug 4, 2026-6pm EDT Aug 10, 2026

Today

W wind 5 to 8 kt becoming SSW in the afternoon. Partly sunny. Seas 2 to 3 ft.

Tonight

SSW wind 5 to 8 kt becoming variable and less than 5 kt after midnight. A slight chance of showers after 5am. Seas around 2 ft.

Wednesday

Variable winds less than 5 kt becoming SSW 5 to 10 kt in the morning. A slight chance of showers before 10am. Seas around 2 ft.

Wednesday Night

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

Thursday

SSW wind 9 to 14 kt, with gusts as high as 20 kt. Mostly sunny. Seas 2 to 3 ft.

Thursday Night

SW wind around 13 kt. Partly cloudy. Seas around 2 ft.

Friday

SW wind 11 to 16 kt. Mostly sunny. Seas 2 to 3 ft.

Friday Night

SW wind 11 to 15 kt. Partly cloudy. Seas 2 to 3 ft.

Saturday

SW wind 9 to 12 kt. Mostly sunny. 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.