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10NM S Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 6:14 am EST Dec 9, 2025
Forecast Valid: 7am EST Dec 9, 2025-6pm EST Dec 15, 2025

Today

Variable winds 5 kt or less. Increasing clouds. Seas around 1 ft.

Tonight

SSW wind 10 to 15 kt. A chance of snow, mainly before 3am. Seas 1 to 2 ft.

Wednesday

SW wind 10 to 15 kt becoming S in the afternoon. Winds could gust as high as 25 kt. A slight chance of snow before 10am, then rain. Seas around 2 ft.

Wednesday Night

SW wind 10 to 15 kt, with gusts as high as 20 kt. Rain likely before midnight. Seas around 2 ft.

Thursday

W wind around 15 kt, with gusts as high as 25 kt. Mostly sunny. Seas 1 to 2 ft.

Thursday Night

W wind around 15 kt, with gusts as high as 25 kt. Partly cloudy. Seas around 2 ft.

Friday

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

Friday Night

W wind around 10 kt. Partly cloudy. Seas around 1 ft.

Saturday

WSW wind around 10 kt. Partly 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.