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8NM SE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 5:31 pm EDT Mar 16, 2026
Forecast Valid: 8pm EDT Mar 16, 2026-6pm EDT Mar 23, 2026

Tonight

SSE wind 20 to 25 kt, with gusts as high as 35 kt. Rain, mainly before 5am. Seas 5 ft building to 7 ft.

Tuesday

W wind around 20 kt, with gusts as high as 30 kt. Cloudy through mid morning, then gradual clearing. Seas 5 to 6 ft.

Tuesday Night

W wind 20 to 25 kt, with gusts as high as 30 kt. Mostly clear. Seas 4 to 5 ft.

Wednesday

WNW wind 10 to 15 kt becoming W 5 to 8 kt in the afternoon. Winds could gust as high as 20 kt. Increasing clouds. Seas 3 to 4 ft.

Wednesday Night

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

Thursday

S wind 10 to 15 kt, with gusts as high as 20 kt. Mostly 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. Mostly cloudy. Seas around 3 ft.

Friday

WSW wind around 15 kt. Partly sunny. Seas around 3 ft.

Friday Night

SW wind around 15 kt becoming W after midnight. Winds could gust as high as 25 kt. A chance of rain after midnight. Seas 2 to 3 ft.

Winds and seas higher in and near tstms.

*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.