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6NM SSE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 3:00 pm EDT Sep 21, 2026
Forecast Valid: 8pm EDT Sep 21, 2026-6pm EDT Sep 28, 2026

Tonight

Variable winds less than 5 kt becoming NE 5 to 10 kt after midnight. Mostly cloudy. Seas around 2 ft.

Tuesday

NE wind around 10 kt. Cloudy through mid morning, then gradual clearing. Seas 2 to 3 ft.

Tuesday Night

NE wind 5 to 10 kt. Partly cloudy. Seas around 3 ft.

Wednesday

ENE wind 10 to 15 kt. Mostly sunny. Seas 3 to 4 ft.

Wednesday Night

ENE wind 5 to 10 kt. Mostly clear. Seas 4 to 5 ft.

Thursday

NE wind 10 to 15 kt. Mostly sunny. Seas 5 to 6 ft.

Thursday Night

NNE wind 5 to 10 kt increasing to 10 to 15 kt after midnight. Mostly cloudy. Seas 6 to 7 ft.

Friday

NNE wind 15 to 20 kt, with gusts as high as 30 kt. A chance of showers. Seas 7 to 8 ft.

Friday Night

NNE wind around 20 kt, with gusts as high as 30 kt. Showers likely. Seas around 9 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.