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4NM E Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 5:35 am EDT May 17, 2026
Forecast Valid: 9am EDT May 17, 2026-6pm EDT May 23, 2026

Today

W wind around 10 kt. Isolated showers after 2pm. Seas around 1 ft.

Tonight

Variable winds 5 kt or less. Partly cloudy. Seas around 1 ft.

Monday

Variable winds 5 kt or less. Mostly sunny. Seas around 1 ft.

Monday Night

SSE wind 5 to 10 kt becoming SSW after midnight. Mostly clear. Seas around 1 ft.

Tuesday

SW wind 5 to 10 kt. Sunny. Seas around 1 ft.

Tuesday Night

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

Wednesday

SW wind around 10 kt. A chance of showers after 2pm. Seas around 1 ft.

Wednesday Night

W wind around 10 kt becoming WNW after midnight. A chance of showers. Seas around 1 ft.

Thursday

NW wind 5 to 10 kt. Mostly 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.