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8NM SE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 2:27 pm EDT Mar 18, 2026
Forecast Valid: 5pm EDT Mar 18, 2026-6pm EDT Mar 25, 2026

Tonight

S wind 10 to 15 kt. Mostly cloudy. Seas 2 to 3 ft.

Thursday

S wind 10 to 15 kt. Partly sunny. Seas 2 to 3 ft.

Thursday Night

S wind around 15 kt becoming SW after midnight. Winds could gust as high as 20 kt. Partly cloudy. Seas around 3 ft.

Friday

WSW wind 5 to 10 kt becoming S in the afternoon. Increasing clouds. Seas around 2 ft.

Friday Night

SSW wind around 15 kt, with gusts as high as 20 kt. Showers likely, mainly after 4am. Seas around 2 ft.

Saturday

S wind around 15 kt, with gusts as high as 25 kt. Showers likely, mainly before 8am. Seas around 3 ft.

Saturday Night

SSW wind around 15 kt, with gusts as high as 25 kt. Mostly cloudy. Seas around 3 ft.

Sunday

SW wind 15 to 20 kt becoming W in the afternoon. Winds could gust as high as 25 kt. A chance of rain. Seas around 3 ft.

Sunday Night

NW wind around 20 kt becoming N after midnight. Winds could gust as high as 30 kt. A chance of rain. 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.