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4NM E Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 6:43 am EST Dec 11, 2025
Forecast Valid: 9am EST Dec 11, 2025-6pm EST Dec 17, 2025

Today

W wind around 20 kt, with gusts as high as 35 kt. Mostly sunny. Seas around 1 ft.

Tonight

W wind around 20 kt, with gusts as high as 35 kt. Widespread freezing spray after 8pm. Mostly clear. Seas around 1 ft.

Friday

W wind around 15 kt, with gusts as high as 30 kt. Widespread freezing spray before 10am. Sunny. Seas around 1 ft.

Friday Night

W wind 12 to 15 kt decreasing to 10 to 13 kt after midnight. Mostly clear. Seas around 1 ft.

Saturday

W wind 5 to 10 kt. Partly sunny. Seas around 1 ft.

Saturday Night

W wind 5 to 10 kt. A chance of snow showers after 5am. Seas around 1 ft.

Sunday

W wind 5 to 10 kt becoming NW in the afternoon. Winds could gust as high as 20 kt. A chance of snow. Seas around 1 ft.

Sunday Night

NW wind around 15 kt, with gusts as high as 30 kt. A chance of snow. Seas around 1 ft.

Monday

WNW wind around 15 kt, with gusts as high as 25 kt. Sunny. Seas around 1 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.