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4NM E Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 2:25 pm EDT Mar 15, 2026
Forecast Valid: 7pm EDT Mar 15, 2026-6pm EDT Mar 22, 2026

Tonight

SSE wind 10 to 15 kt. A chance of rain after 5am. Seas 1 to 2 ft.

Monday

SE wind 15 to 20 kt becoming S in the afternoon. Rain, with thunderstorms also possible after 2pm. Seas around 2 ft.

Monday Night

S wind around 20 kt, with gusts as high as 40 kt. Rain and possibly a thunderstorm. Seas 2 to 3 ft.

Tuesday

W wind 15 to 20 kt, with gusts as high as 30 kt. A chance of rain before 10am. Seas around 2 ft.

Tuesday Night

W wind 15 to 20 kt, with gusts as high as 25 kt. Mostly clear. Seas around 2 ft.

Wednesday

W wind 5 to 10 kt. Sunny. Seas around 2 ft.

Wednesday Night

SSW wind 5 to 10 kt. Mostly cloudy. Seas around 2 ft.

Thursday

SSE wind around 10 kt. Partly sunny. Seas around 2 ft.

Thursday Night

SSE wind around 10 kt becoming SSW after midnight. 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.