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10NM S Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 6:38 pm EDT Jul 18, 2025
Forecast Valid: 11pm EDT Jul 18, 2025-6pm EDT Jul 25, 2025

Overnight

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

Saturday

Variable winds less than 5 kt becoming SE 5 to 10 kt in the afternoon. Sunny. Seas around 1 ft.

Saturday Night

SSW wind around 10 kt. A slight chance of showers after 3am. Seas around 2 ft.

Sunday

SSW wind around 10 kt. A chance of showers, then showers and thunderstorms likely after 1pm. Seas around 2 ft.

Sunday Night

NW wind 5 to 10 kt. A chance of showers and thunderstorms before 9pm. Seas around 2 ft.

Monday

NW wind around 10 kt. Sunny. Seas around 1 ft.

Monday Night

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

Tuesday

Variable winds 5 kt or less. Sunny. Seas around 1 ft.

Tuesday Night

Variable winds 5 kt or less. Mostly clear. 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.