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10NM S Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 4:56 pm EST Jan 17, 2026
Forecast Valid: 6pm EST Jan 17, 2026-6pm EST Jan 24, 2026

Tonight

WSW wind 5 to 10 kt. A chance of rain before 7pm. Seas 2 to 3 ft.

Sunday

Variable winds 5 kt or less. A slight chance of snow between 9am and noon, then a chance of rain and snow. Seas around 2 ft.

Sunday Night

N wind 5 to 10 kt becoming NW after midnight. Snow likely, mainly before 11pm. Seas around 2 ft.

M.L.King Day

W wind 10 to 13 kt becoming WSW 12 to 15 kt in the afternoon. Winds could gust as high as 20 kt. Partly sunny. Seas around 2 ft.

Monday Night

W wind 15 to 20 kt. Widespread freezing spray after 4am. Partly cloudy. Seas 2 to 3 ft.

Tuesday

W wind around 15 kt, with gusts as high as 25 kt. Widespread freezing spray before noon. Mostly sunny. Seas around 2 ft.

Tuesday Night

W wind 10 to 15 kt. Widespread freezing spray. Mostly clear. Seas 1 to 2 ft.

Wednesday

WSW wind 10 to 15 kt becoming SSW in the afternoon. Widespread freezing spray before 11am. Mostly sunny. Seas 1 to 2 ft.

Wednesday Night

SW wind around 15 kt, with gusts as high as 25 kt. Mostly cloudy. 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.