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8NM SE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 2:40 am EDT Mar 9, 2026
Forecast Valid: 5am EDT Mar 9, 2026-6pm EDT Mar 15, 2026

Today

SW wind 10 to 13 kt becoming S 12 to 15 kt in the afternoon. Winds could gust as high as 20 kt. Mostly sunny. Seas around 2 ft.

Tonight

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

Tuesday

SW wind 5 to 10 kt becoming S in the afternoon. Sunny. Seas 1 to 2 ft.

Tuesday Night

SSW wind around 10 kt. Increasing clouds. Seas 1 to 2 ft.

Wednesday

ENE wind around 15 kt, with gusts as high as 20 kt. A chance of rain. Seas around 2 ft.

Wednesday Night

S wind 15 to 20 kt, with gusts as high as 30 kt. Rain likely, mainly between 10pm and midnight. Seas 3 to 4 ft.

Thursday

SW wind around 20 kt becoming W in the afternoon. Winds could gust as high as 30 kt. Rain likely, mainly between 10am and 1pm. Seas 4 to 5 ft.

Thursday Night

WNW wind 20 to 25 kt, with gusts as high as 35 kt. A chance of snow. Seas around 3 ft.

Friday

W wind around 15 kt becoming SSW in the afternoon. Winds could gust as high as 25 kt. Mostly sunny. Seas around 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.