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3NM SE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 1:47 am EDT Aug 1, 2026
Forecast Valid: 2am EDT Aug 1, 2026-6pm EDT Aug 7, 2026

Saturday

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

Saturday Night

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

Sunday

SSW wind 5 to 8 kt becoming SSE 7 to 10 kt in the afternoon. Winds could gust as high as 20 kt. Partly sunny. Seas 1 ft or less.

Sunday Night

S wind 5 to 10 kt. Showers likely, mainly after 4am. Seas 1 ft or less.

Monday

Variable winds 5 kt or less. Showers, with thunderstorms also possible after 2pm. Seas 1 ft or less.

Monday Night

Variable winds 5 kt or less. Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and midnight. Seas 1 ft or less.

Tuesday

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

Tuesday Night

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

Wednesday

Variable winds 5 kt or less. Partly sunny. Seas 1 ft or less.

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.