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20NM E Hyannis MA

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 2:49 am EDT Mar 9, 2026
Forecast Valid: 4am EDT Mar 9, 2026-6pm EDT Mar 15, 2026

Monday

SSW wind 6 to 10 kt. Patchy dense fog before noon. Seas around 3 ft.

Monday Night

SW wind around 11 kt. Patchy fog. Seas 2 to 3 ft.

Tuesday

SW wind around 10 kt. Patchy fog before 11am. Seas around 2 ft.

Tuesday Night

SW wind 8 to 10 kt. Patchy fog before 9pm. Seas around 2 ft.

Wednesday

S wind 9 to 13 kt. Cloudy. Seas around 2 ft.

Wednesday Night

SSW wind 17 to 22 kt. A slight chance of rain. Seas 3 ft building to 5 ft.

Thursday

SSW wind 19 to 22 kt becoming W in the afternoon. Rain likely, mainly after 4pm. Seas 5 to 6 ft.

Thursday Night

WNW wind 19 to 23 kt. A chance of rain before 11pm, then a chance of snow between 11pm and 1am. Seas around 5 ft.

Friday

WNW wind 13 to 16 kt becoming SSW in the afternoon. Mostly sunny. Seas 3 to 4 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.