For More Weather Information:

8NM SE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 4:50 am EDT May 17, 2026
Forecast Valid: 5am EDT May 17, 2026-6pm EDT May 23, 2026

Today

W wind around 10 kt. Sunny. Seas 2 to 3 ft.

Tonight

NW wind 5 to 10 kt becoming NE after midnight. Partly cloudy. Seas 1 to 2 ft.

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. Partly cloudy. Seas around 2 ft.

Tuesday

SW wind around 10 kt. Sunny. Seas around 2 ft.

Tuesday Night

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

Wednesday

SW wind around 15 kt. Showers likely, mainly after 5pm. Seas around 2 ft.

Wednesday Night

W wind 10 to 15 kt becoming WNW after midnight. A chance of showers. Seas around 2 ft.

Thursday

NW wind 5 to 10 kt becoming WSW in the afternoon. Mostly sunny. Seas 1 to 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.