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4NM E Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 2:28 pm EDT Mar 12, 2026
Forecast Valid: 5pm EDT Mar 12, 2026-6pm EDT Mar 19, 2026

Late Afternoon

WNW wind around 15 kt. A chance of rain and snow. Seas around 1 ft.

Tonight

WNW wind 10 to 15 kt. A chance of snow, mainly before 7pm. Seas around 1 ft.

Friday

W wind around 10 kt becoming S in the afternoon. A chance of rain and snow after 5pm. Seas around 1 ft.

Friday Night

S wind around 15 kt, with gusts as high as 25 kt. A chance of snow before 11pm, then a chance of rain. Seas around 2 ft.

Saturday

W wind 15 to 18 kt increasing to 17 to 20 kt in the afternoon. Winds could gust as high as 30 kt. A chance of rain before 9am. Seas around 2 ft.

Saturday Night

WNW wind 12 to 15 kt decreasing to 10 to 13 kt after midnight. Winds could gust as high as 25 kt. Mostly clear. Seas around 1 ft.

Sunday

Variable winds 5 kt or less. Mostly cloudy. Seas around 1 ft.

Sunday Night

SE wind 10 to 15 kt. A chance of rain. Seas 1 to 2 ft.

Monday

SSE wind around 20 kt, with gusts as high as 30 kt. 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.