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8NM SE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 2:22 pm EDT Mar 20, 2026
Forecast Valid: 9pm EDT Mar 20, 2026-6pm EDT Mar 27, 2026

Tonight

SSW wind 15 to 20 kt decreasing to 10 to 15 kt after midnight. Winds could gust as high as 25 kt. Rain likely, mainly before 2am. Seas 3 to 4 ft.

Saturday

NW wind around 10 kt. Mostly cloudy, then gradually becoming sunny. Seas around 3 ft.

Saturday Night

NW wind 5 to 10 kt becoming NE after midnight. A slight chance of snow after 4am. Seas around 2 ft.

Sunday

SSE wind 10 to 15 kt. Rain and snow likely before 11am, then rain. Seas around 2 ft.

Sunday Night

NNE wind 10 to 15 kt, with gusts as high as 25 kt. Rain likely, mainly before 10pm. Seas 2 to 3 ft.

Monday

NNE wind 15 to 20 kt, with gusts as high as 30 kt. A chance of snow. Seas around 3 ft.

Monday Night

N wind 15 to 20 kt. A chance of snow before 9pm. Seas around 3 ft.

Tuesday

NNW wind 12 to 15 kt becoming NW 10 to 13 kt in the afternoon. Winds could gust as high as 20 kt. Mostly sunny. Seas 2 to 3 ft.

Tuesday Night

SW wind 15 to 20 kt, with gusts as high as 25 kt. Partly cloudy. Seas 2 to 3 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.