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9NM S Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 3:17 am EST Dec 15, 2025
Forecast Valid: 4am EST Dec 15, 2025-6pm EST Dec 21, 2025

Monday

WNW wind around 15 kt, with gusts as high as 30 kt. Increasing clouds. Seas 1 ft or less.

Monday Night

W wind 5 to 10 kt. Mostly cloudy. Seas 1 ft or less.

Tuesday

Variable winds 5 kt or less. Sunny. Seas 1 ft or less.

Tuesday Night

SW wind 5 to 10 kt. Mostly cloudy. Seas 1 ft or less.

Wednesday

SW wind around 10 kt, with gusts as high as 20 kt. Mostly sunny. Seas 1 ft or less.

Wednesday Night

W wind 5 to 10 kt. Partly cloudy. Seas 1 ft or less.

Thursday

WSW wind 5 to 10 kt becoming S in the afternoon. Partly sunny. Seas 1 ft or less.

Thursday Night

S wind 10 to 15 kt, with gusts as high as 25 kt. Rain. Seas 1 ft or less.

Friday

S wind around 15 kt becoming W in the afternoon. Winds could gust as high as 25 kt. Showers likely. Seas 1 ft or less.

*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.