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4NM E Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 6:03 am EST Dec 31, 2025
Forecast Valid: 9am EST Dec 31, 2025-6pm EST Jan 6, 2026

Today

WSW wind around 10 kt. Partly sunny. Seas around 1 ft.

Tonight

SSW wind around 10 kt. Snow. Seas around 1 ft.

New Year's Day

W wind 5 to 8 kt becoming WNW 15 to 20 kt in the afternoon. Snow likely, mainly before 1pm. Widespread freezing spray after 3pm. Seas around 1 ft.

Thursday Night

W wind 15 to 20 kt, with gusts as high as 25 kt. Widespread freezing spray. Mostly clear. Seas around 1 ft.

Friday

W wind 10 to 15 kt. Widespread freezing spray before 1pm. Mostly sunny. Seas around 1 ft.

Friday Night

WSW wind around 10 kt. Widespread freezing spray after 3am. Mostly clear. Seas around 1 ft.

Saturday

W wind 10 to 15 kt. Widespread freezing spray before 11am. Mostly sunny. Seas around 1 ft.

Saturday Night

WNW wind 5 to 10 kt. Widespread freezing spray after 1am. Mostly cloudy. Seas around 1 ft.

Sunday

Variable winds 5 kt or less. Widespread freezing spray before 8am. Mostly 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.