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4NM E Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 8:01 pm EDT Mar 17, 2026
Forecast Valid: 9pm EDT Mar 17, 2026-6pm EDT Mar 24, 2026

Tonight

W wind around 15 kt, with gusts as high as 25 kt. Mostly clear. Seas around 1 ft.

Wednesday

WNW wind 7 to 10 kt becoming WSW 5 to 8 kt in the afternoon. Widespread freezing spray before 9am. Sunny. Seas around 1 ft.

Wednesday Night

SSE wind 5 to 10 kt becoming SSW after midnight. Partly cloudy. Seas around 1 ft.

Thursday

SSE wind 5 to 10 kt. Sunny. Seas around 1 ft.

Thursday Night

SSE wind around 10 kt becoming SSW after midnight. Mostly cloudy. Seas around 1 ft.

Friday

SW wind around 10 kt. Mostly sunny. Seas around 1 ft.

Friday Night

SW wind around 10 kt becoming WNW after midnight. Partly cloudy. Seas around 1 ft.

Saturday

NNE wind 10 to 15 kt becoming SSE in the afternoon. A chance of rain. Seas around 1 ft.

Saturday Night

SW wind 10 to 15 kt. A chance of rain. 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.