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4NM E Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 6:51 am EDT Mar 9, 2026
Forecast Valid: 7am EDT Mar 9, 2026-6pm EDT Mar 15, 2026

Today

S wind 5 to 8 kt increasing to 7 to 10 kt in the afternoon. Winds could gust as high as 20 kt. Mostly sunny. Seas around 1 ft.

Tonight

SW wind 5 to 10 kt. Mostly clear. Seas around 1 ft.

Tuesday

Variable winds 5 kt or less. Sunny. Seas around 1 ft.

Tuesday Night

SSW wind 5 to 10 kt. Partly cloudy. Seas around 1 ft.

Wednesday

E wind around 10 kt. A chance of rain after 8am. Seas around 1 ft.

Wednesday Night

S wind 10 to 15 kt. Rain likely, mainly before 2am. Seas around 1 ft.

Thursday

SW wind around 15 kt becoming W in the afternoon. Winds could gust as high as 25 kt. Rain likely, mainly between 9am and 1pm. Seas around 1 ft.

Thursday Night

WNW wind around 15 kt, with gusts as high as 25 kt. A chance of snow. Seas around 2 ft.

Friday

W wind around 10 kt becoming SSW in the afternoon. Mostly sunny. Seas 1 to 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.