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4NM E Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 2:35 am EDT May 21, 2026
Forecast Valid: 3am EDT May 21, 2026-6pm EDT May 27, 2026

Thursday

N wind 5 to 10 kt becoming SSE in the afternoon. Mostly cloudy. Seas around 1 ft.

Thursday Night

Variable winds 5 kt or less. Mostly cloudy, then gradually becoming mostly clear. Seas around 1 ft.

Friday

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

Saturday Night

Variable winds 5 kt or less. A chance of showers after 3am. Seas around 1 ft.

Sunday

ESE wind 5 to 10 kt. Showers likely, mainly after 9am. Seas around 1 ft.

Sunday Night

E wind around 10 kt. Showers likely. Seas around 1 ft.

Memorial Day

Variable winds 5 kt or less. A chance of showers. Seas around 2 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.