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10NM S Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 1:16 pm EST Dec 9, 2025
Forecast Valid: 7pm EST Dec 9, 2025-6pm EST Dec 16, 2025

Tonight

SSW wind around 15 kt, with gusts as high as 20 kt. A chance of snow before 3am, then a slight chance of rain between 3am and 4am. Seas around 2 ft.

Wednesday

SSW wind 15 to 20 kt, with gusts as high as 25 kt. Rain, mainly after 4pm. Seas 2 to 3 ft.

Wednesday Night

SW wind 15 to 20 kt, with gusts as high as 25 kt. Rain likely, mainly before 7pm. Seas 2 to 3 ft.

Thursday

W wind 20 to 25 kt increasing to 25 to 30 kt in the afternoon. Winds could gust as high as 40 kt. Mostly sunny. Seas around 2 ft.

Thursday Night

W wind 25 to 30 kt, with gusts as high as 40 kt. Partly cloudy. Seas around 2 ft.

Friday

W wind around 20 kt, with gusts as high as 30 kt. Sunny. Seas around 2 ft.

Friday Night

W wind 12 to 15 kt decreasing to 10 to 13 kt after midnight. Winds could gust as high as 25 kt. Partly cloudy. Seas 1 to 2 ft.

Saturday

WSW wind around 10 kt. Partly sunny. Seas around 1 ft.

Saturday Night

W wind around 15 kt. Mostly cloudy. Seas around 1 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.