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4NM E Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 8:32 am EST Nov 29, 2025
Forecast Valid: 12pm EST Nov 29, 2025-6pm EST Dec 5, 2025

This Afternoon

WNW wind 10 to 15 kt. Sunny. Seas around 1 ft.

Tonight

WNW wind 5 to 10 kt becoming variable and less than 5 kt in the evening. Increasing clouds. Seas around 1 ft.

Sunday

S wind 5 to 10 kt increasing to 15 to 20 kt. Winds could gust as high as 25 kt. Rain, mainly after 2pm. Seas around 1 ft.

Sunday Night

SSW wind 17 to 20 kt becoming WSW 15 to 18 kt after midnight. Showers, mainly before 11pm. Seas around 1 ft.

Monday

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

Monday Night

NW wind 5 to 10 kt becoming variable and less than 5 kt after midnight. Mostly cloudy. Seas around 1 ft.

Tuesday

Variable winds 5 kt or less. Snow likely after 11am, mixing with rain after 4pm. Seas around 1 ft.

Tuesday Night

NE wind 5 to 8 kt becoming N 10 to 15 kt after midnight. Rain and snow, becoming all snow after 11pm. Seas around 1 ft.

Wednesday

NNW wind around 10 kt. 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.