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6NM SSE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 11:43 pm EDT Mar 16, 2026
Forecast Valid: 12am EDT Mar 17, 2026-6pm EDT Mar 23, 2026

Overnight

S wind around 20 kt, with gusts as high as 40 kt. Rain, mainly before 5am. Seas 7 to 8 ft.

Tuesday

WSW wind around 15 kt, with gusts as high as 30 kt. Mostly cloudy, then gradually becoming sunny. Seas 8 ft subsiding to 6 ft.

Tuesday Night

W wind around 15 kt, with gusts as high as 25 kt. Mostly clear. Seas 5 to 6 ft.

Wednesday

WNW wind 7 to 10 kt becoming W 5 to 8 kt in the afternoon. Mostly sunny. Seas around 4 ft.

Wednesday Night

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

Thursday

SSE wind 5 to 10 kt. Mostly sunny. Seas 3 to 4 ft.

Thursday Night

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

Friday

SW wind around 10 kt. Partly sunny. Seas 2 to 3 ft.

Friday Night

SW wind around 10 kt. A chance of snow after 5am. Seas around 2 ft.

Winds and seas higher in and near tstms.

*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.