For More Weather Information:

4NM E Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 2:42 am EDT May 15, 2026
Forecast Valid: 5am EDT May 15, 2026-6pm EDT May 21, 2026

Today

NE wind 7 to 10 kt decreasing to 5 to 8 kt in the afternoon. Rain likely, mainly before 1pm. Patchy dense fog before 9am. Seas around 1 ft.

Tonight

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

Saturday

WSW wind 5 to 10 kt. Sunny. Seas around 1 ft.

Saturday Night

SSW wind around 10 kt. Partly cloudy. Seas around 1 ft.

Sunday

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

Sunday Night

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

Monday

Variable winds less than 5 kt becoming SSE 5 to 10 kt in the afternoon. Mostly sunny. Seas around 1 ft.

Monday Night

S wind around 10 kt becoming SSW after midnight. Mostly clear. Seas around 1 ft.

Tuesday

SSW wind 5 to 10 kt. 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.