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20NM E Hyannis MA

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 9:25 am EDT Jul 15, 2026
Forecast Valid: 11am EDT Jul 15, 2026-6pm EDT Jul 21, 2026

Today

WNW wind 6 to 9 kt becoming NNW in the afternoon. Widespread haze before 2pm. Patchy smoke after 2pm. Seas around 2 ft.

Tonight

Variable winds less than 5 kt becoming WNW around 6 kt in the evening. Widespread haze after 10pm. Patchy smoke before 10pm. Seas around 2 ft.

Thursday

WNW wind 7 to 10 kt becoming SW 13 to 16 kt in the afternoon. Winds could gust as high as 22 kt. Widespread haze. Seas 2 to 3 ft.

Thursday Night

WSW wind 11 to 14 kt becoming NNW 7 to 10 kt in the evening. Widespread haze before 9pm. Seas 2 to 3 ft.

Friday

WNW wind 5 to 8 kt becoming variable and less than 5 kt. Sunny. Seas 1 to 2 ft.

Friday Night

SSW wind around 8 kt. Partly cloudy. Seas around 2 ft.

Saturday

SSW wind 7 to 10 kt increasing to 12 to 15 kt in the afternoon. Winds could gust as high as 21 kt. A chance of showers after 10am. Seas 2 to 3 ft.

Saturday Night

S wind around 15 kt, with gusts as high as 21 kt. Showers. Seas 2 to 3 ft.

Sunday

SW wind 12 to 14 kt becoming NNW in the afternoon. Showers likely. Seas around 3 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.