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6NM SSE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 4:08 am EDT Mar 16, 2026
Forecast Valid: 5am EDT Mar 16, 2026-6pm EDT Mar 22, 2026

Today

SE wind 15 to 20 kt, with gusts as high as 30 kt. Rain, with thunderstorms also possible after 11am. Seas 3 ft building to 6 ft.

Tonight

SSE wind around 20 kt, with gusts as high as 40 kt. Rain, mainly before 5am. Areas of fog between 9pm and 3am. Seas 7 to 8 ft.

Tuesday

W wind around 15 kt, with gusts as high as 25 kt. A chance of rain, mainly before 7am. Seas 8 ft subsiding to 6 ft.

Tuesday Night

W wind around 15 kt, with gusts as high as 25 kt. Mostly clear. Seas around 5 ft.

Wednesday

WNW wind 5 to 10 kt. Sunny. Seas around 4 ft.

Wednesday Night

Variable winds 5 kt or less. Mostly cloudy. Seas around 3 ft.

Thursday

SSE wind 5 to 10 kt. Partly sunny. Seas around 3 ft.

Thursday Night

SSE wind around 10 kt becoming SSW after midnight. Mostly cloudy. Seas 3 to 4 ft.

Friday

SW wind around 10 kt. Partly sunny. Seas around 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.