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18NM SW Hyannis MA

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 10:13 am EST Nov 13, 2026
Forecast Valid: 11am EST Nov 13, 2026-6pm EST Nov 19, 2026

...GALE WARNING IN EFFECT UNTIL 7 PM EST THIS EVENING...

Today

NNE wind 13 to 15 kt, with gusts as high as 31 kt. A chance of rain, mainly after 1pm. Seas 1 ft or less.

Tonight

NNE wind 8 to 10 kt, with gusts as high as 25 kt. A slight chance of rain before 7pm. Seas 1 ft or less.

Saturday

NW wind 8 to 10 kt. Mostly sunny. Seas 1 ft or less.

Saturday Night

NW wind around 9 kt. Mostly cloudy, then gradually becoming mostly clear. Seas 1 ft or less.

Sunday

NW wind 9 to 13 kt, with gusts as high as 21 kt. Sunny. Seas 1 ft or less.

Sunday Night

NNW wind 6 to 10 kt. Mostly clear. Seas 1 ft or less.

Monday

NNW wind 8 to 11 kt decreasing to 5 to 8 kt in the afternoon. Sunny. Seas 1 ft or less.

Monday Night

Variable winds less than 5 kt becoming NW around 6 kt in the evening. Mostly clear. Seas 1 ft or less.

Tuesday

WNW wind 6 to 9 kt becoming W in the afternoon. Sunny. Seas 1 ft or less.

*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.