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4NM E Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 2:40 pm EDT Apr 17, 2026
Forecast Valid: 6pm EDT Apr 17, 2026-6pm EDT Apr 24, 2026

Tonight

Variable winds 5 kt or less. Patchy fog after 5am. Seas around 1 ft.

Saturday

ENE wind around 10 kt. Patchy dense fog before 7am, then Patchy dense fog between 8am and 11am. Seas around 1 ft.

Saturday Night

Variable winds 5 kt or less. A chance of showers, mainly after 5am. Patchy fog after 1am. Seas around 1 ft.

Sunday

SSE wind 5 to 10 kt becoming W in the afternoon. Rain, mainly after 9am. Areas of fog before 9am. Seas 1 to 2 ft.

Sunday Night

W wind around 10 kt. A chance of rain before 10pm. Seas around 2 ft.

Monday

W wind around 10 kt. Mostly sunny. Seas around 1 ft.

Monday Night

NW wind 5 to 10 kt becoming N after midnight. Partly cloudy. Seas around 1 ft.

Tuesday

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

Tuesday Night

SSW wind around 10 kt. A chance of showers. 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.