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6NM SSE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 11:25 am EST Feb 23, 2026
Forecast Valid: 12pm EST Feb 23, 2026-6pm EST Mar 1, 2026

This Afternoon

N wind 25 to 30 kt, with gusts as high as 40 kt. Snow. Seas 7 to 8 ft.

Tonight

N wind 17 to 20 kt becoming NW 15 to 18 kt after midnight. Winds could gust as high as 30 kt. Snow likely, mainly before 8pm. Seas 9 to 10 ft.

Tuesday

WNW wind around 10 kt. Mostly sunny. Seas 10 ft subsiding to 8 ft.

Tuesday Night

WNW wind 5 to 10 kt becoming SW after midnight. Increasing clouds. Seas 7 ft subsiding to 5 ft.

Wednesday

SSW wind 5 to 10 kt. Snow before noon, then rain and snow between noon and 4pm, then snow likely after 4pm. Seas 3 to 4 ft.

Wednesday Night

W wind around 10 kt. A chance of snow, mixing with rain after 7pm, then gradually ending. Seas 2 to 3 ft.

Thursday

W wind around 10 kt. Mostly sunny. Seas 1 to 2 ft.

Thursday Night

S wind 5 to 10 kt becoming ESE after midnight. A chance of snow between 7pm and 10pm, then rain and snow likely. Seas 1 to 2 ft.

Friday

WNW wind 5 to 10 kt. A chance of rain and snow before 10am, then a chance of snow between 10am and noon. Seas 2 to 3 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.