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18NM NNE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 12:17 am EST Jan 25, 2026
Forecast Valid: 1am EST Jan 25, 2026-6pm EST Jan 31, 2026

Sunday

Variable winds 5 kt or less. Snow, mainly after 2pm. The snow could be heavy at times. Seas 1 ft or less.

Sunday Night

E wind 5 to 10 kt becoming NNE after midnight. Winds could gust as high as 20 kt. Snow. The snow could be heavy at times. Seas 1 ft or less.

Monday

N wind around 10 kt, with gusts as high as 20 kt. Snow. Seas 1 ft or less.

Monday Night

NNW wind 5 to 10 kt becoming WNW after midnight. Snow likely before 2am. Seas 1 ft or less.

Tuesday

WNW wind 5 to 10 kt. Partly sunny. Seas 1 ft or less.

Tuesday Night

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

Wednesday

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

Wednesday Night

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

Thursday

Variable winds 5 kt or less. Mostly cloudy. 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.