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10NM S Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 1:34 pm EST Dec 7, 2025
Forecast Valid: 3pm EST Dec 7, 2025-6pm EST Dec 14, 2025

This Afternoon

Variable winds 5 kt or less. Cloudy. Seas 1 to 2 ft.

Tonight

SW wind 5 to 8 kt becoming NW 15 to 20 kt. Cloudy during the early evening, then gradual clearing. Seas 2 to 3 ft.

Monday

NW wind 17 to 20 kt decreasing to 15 to 18 kt in the afternoon. Winds could gust as high as 25 kt. Sunny. Seas 2 to 3 ft.

Monday Night

WNW wind 10 to 15 kt. Mostly clear. Seas around 2 ft.

Tuesday

W wind 5 to 8 kt becoming SSW 7 to 10 kt in the afternoon. Mostly sunny. Seas 1 to 2 ft.

Tuesday Night

SW wind around 15 kt. A chance of snow before 1am. Seas around 2 ft.

Wednesday

SSW wind around 15 kt. Rain likely, mainly after 2pm. Seas around 2 ft.

Wednesday Night

SW wind around 15 kt. A chance of rain. Seas around 2 ft.

Thursday

W wind around 15 kt. Mostly sunny. Seas around 2 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.