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8NM SE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 7:18 pm EDT May 17, 2026
Forecast Valid: 1am EDT May 18, 2026-6pm EDT May 24, 2026

Monday

ENE wind 5 to 10 kt becoming SE in the afternoon. Mostly sunny. Seas around 1 ft.

Monday Night

SSE wind around 10 kt becoming SSW after midnight. Increasing clouds. Seas around 2 ft.

Tuesday

SW wind around 10 kt. A slight chance of showers and thunderstorms after 5pm. Seas around 2 ft.

Tuesday Night

SW wind 10 to 15 kt. Partly cloudy. Seas 2 to 3 ft.

Wednesday

SW wind around 15 kt. A chance of showers after 2pm. Seas around 2 ft.

Wednesday Night

NW wind 10 to 15 kt. A chance of showers before 9pm. Seas around 2 ft.

Thursday

NNW wind 5 to 10 kt becoming SSE in the afternoon. Mostly sunny. Seas 1 to 2 ft.

Thursday Night

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

Friday

NNE wind 5 to 8 kt becoming SSE 7 to 10 kt in the afternoon. Mostly sunny. 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.