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4NM E Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 5:38 am EDT Mar 23, 2026
Forecast Valid: 8am EDT Mar 23, 2026-6pm EDT Mar 29, 2026

Today

NNE wind around 15 kt, with gusts as high as 20 kt. A chance of snow showers, mainly after noon. Seas around 1 ft.

Tonight

N wind around 10 kt. A chance of snow showers, mainly before 10pm. Seas 1 to 2 ft.

Tuesday

Variable winds 5 kt or less. Mostly sunny. Seas around 2 ft.

Tuesday Night

SSW wind around 10 kt becoming WSW after midnight. Partly cloudy. Seas around 2 ft.

Wednesday

W wind around 10 kt becoming SSW in the afternoon. Partly sunny. Seas around 2 ft.

Wednesday Night

SSW wind 10 to 15 kt. A chance of rain after 3am. Seas 1 to 2 ft.

Thursday

SW wind around 10 kt. A chance of rain before 10am. Seas around 1 ft.

Thursday Night

SSW wind 10 to 15 kt. Rain likely. Seas 1 to 2 ft.

Friday

NW wind 10 to 15 kt. Rain likely, possibly mixed with snow, mainly before 7am. Seas 1 to 2 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.