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8NM SE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 6:21 am EDT Mar 20, 2026
Forecast Valid: 7am EDT Mar 20, 2026-6pm EDT Mar 26, 2026

Today

WSW wind 10 to 13 kt becoming S 12 to 15 kt in the afternoon. Winds could gust as high as 20 kt. A slight chance of rain after 5pm. Seas around 2 ft.

Tonight

SSW wind 17 to 20 kt becoming WSW 15 to 18 kt after midnight. Winds could gust as high as 30 kt. Rain likely, mainly before 1am. Seas 3 to 4 ft.

Saturday

NW wind around 15 kt, with gusts as high as 25 kt. A slight chance of rain before 8am. Seas 2 to 3 ft.

Saturday Night

NW wind around 10 kt. Increasing clouds. Seas around 2 ft.

Sunday

S wind around 10 kt. A chance of rain before 7am, then rain and snow likely between 7am and 3pm, then rain likely after 3pm. Seas around 2 ft.

Sunday Night

NNE wind 10 to 15 kt, with gusts as high as 25 kt. Rain likely before midnight, then rain and snow likely. Seas 2 to 3 ft.

Monday

NNE wind 15 to 20 kt, with gusts as high as 30 kt. A chance of rain and snow before 3pm, then a chance of snow. Seas around 3 ft.

Monday Night

N wind 15 to 20 kt. Mostly cloudy. 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 25 kt. Sunny. 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.