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4NM E Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 6:33 am EDT May 19, 2026
Forecast Valid: 7am EDT May 19, 2026-6pm EDT May 25, 2026

Today

SW wind 5 to 10 kt. A chance of showers, with thunderstorms also possible after 5pm. Seas around 1 ft.

Tonight

SW wind 5 to 10 kt. A chance of showers and thunderstorms before 8pm. Seas around 1 ft.

Wednesday

W wind around 10 kt. A chance of showers, with thunderstorms also possible after 2pm. Seas around 1 ft.

Wednesday Night

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

Thursday

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

Thursday Night

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

Friday

NNW wind 5 to 10 kt becoming SSE in the morning. Mostly sunny. Seas around 1 ft.

Friday Night

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

Saturday

Variable winds 5 kt or less. Showers likely. Seas around 1 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.