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8NM SE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 12:15 pm EST Nov 18, 2025
Forecast Valid: 4pm EST Nov 18, 2025-6pm EST Nov 25, 2025

Tonight

W wind 10 to 15 kt. Mostly clear. Seas 1 to 2 ft.

Wednesday

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

Wednesday Night

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

Thursday

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

Thursday Night

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

Friday

SSW wind 5 to 8 kt increasing to 7 to 10 kt in the afternoon. Mostly cloudy. Seas 1 to 2 ft.

Friday Night

SW wind around 15 kt becoming WNW after midnight. Mostly cloudy. Seas around 2 ft.

Saturday

WNW wind 10 to 15 kt. Mostly sunny. Seas 1 to 2 ft.

Saturday Night

WNW wind around 10 kt. Partly cloudy. 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.