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4NM E Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 5:44 am EDT Sep 18, 2026
Forecast Valid: 6am EDT Sep 18, 2026-6pm EDT Sep 24, 2026

Today

Variable winds 5 kt or less. Patchy fog before 8am. Seas around 1 ft.

Tonight

NNW wind 5 to 10 kt becoming N after midnight. Partly cloudy. Seas around 1 ft.

Saturday

Variable winds 5 kt or less. Sunny. Seas around 1 ft.

Saturday Night

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

Sunday

S wind 5 to 10 kt. A chance of rain after 2pm. Seas around 1 ft.

Sunday Night

Variable winds 5 kt or less. Rain likely, mainly between 8pm and 2am. Seas around 1 ft.

Monday

NNE wind 5 to 10 kt becoming ENE in the afternoon. A chance of rain before 7am. Seas around 1 ft.

Monday Night

NE wind 5 to 8 kt increasing to 7 to 10 kt after midnight. Partly cloudy. Seas around 1 ft.

Tuesday

NE wind 10 to 15 kt. Mostly cloudy. 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.