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10NM S Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 12:48 pm EST Dec 10, 2025
Forecast Valid: 3pm EST Dec 10, 2025-6pm EST Dec 17, 2025

This Afternoon

SSW wind 15 to 20 kt. Rain likely, mainly after 5pm. Seas around 3 ft.

Tonight

SW wind 15 to 20 kt. Rain, mainly before 10pm. Seas 2 to 3 ft.

Thursday

W wind 20 to 23 kt increasing to 22 to 25 kt in the afternoon. Winds could gust as high as 45 kt. Sunny. Seas around 2 ft.

Thursday Night

W wind around 25 kt, with gusts as high as 45 kt. Partly cloudy. Seas around 2 ft.

Friday

W wind 20 to 25 kt increasing to 25 to 30 kt in the morning. Winds could gust as high as 40 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. Mostly clear. Seas around 1 ft.

Saturday

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

Saturday Night

W wind around 10 kt. Mostly cloudy. Seas around 1 ft.

Sunday

W wind 10 to 13 kt increasing to 12 to 15 kt in the afternoon. Winds could gust as high as 25 kt. A chance of snow. 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.