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18NM NNE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 3:38 pm EDT Mar 19, 2025
Forecast Valid: 6pm EDT Mar 19, 2025-6pm EDT Mar 26, 2025

Tonight

Variable winds 5 kt or less. Patchy fog. Seas 1 ft or less.

Thursday

Variable winds 5 kt or less. Patchy fog. Seas 1 ft or less.

Thursday Night

Variable winds 5 kt or less. Rain likely, mainly after 4am. Patchy fog. Seas 1 ft or less.

Friday

ENE wind 5 to 10 kt becoming NNW in the afternoon. Winds could gust as high as 20 kt. Rain, mainly before 5pm. Seas 1 ft or less.

Friday Night

WNW wind around 10 kt, with gusts as high as 20 kt. A chance of rain before 8pm. Seas 1 ft or less.

Saturday

W wind 5 to 10 kt becoming SSW in the afternoon. Mostly sunny. Seas 1 ft or less.

Saturday Night

SW wind 5 to 10 kt becoming W after midnight. Partly cloudy. Seas 1 ft or less.

Sunday

WNW wind around 10 kt. Sunny. Seas 1 ft or less.

Sunday Night

Variable winds 5 kt or less. Partly 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.