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3NM SE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 6:50 am EDT Mar 21, 2026
Forecast Valid: 9am EDT Mar 21, 2026-6pm EDT Mar 27, 2026

Today

NW wind around 10 kt. Mostly cloudy, then gradually becoming sunny. Seas 1 ft or less.

Tonight

Variable winds 5 kt or less. A slight chance of snow after 5am. Seas 1 ft or less.

Sunday

SSE wind around 10 kt, with gusts as high as 20 kt. Rain and snow likely before 11am, then rain. Seas 1 ft or less.

Sunday Night

N wind 10 to 15 kt, with gusts as high as 25 kt. Rain likely before 2am, then rain and snow likely. Seas 1 ft or less.

Monday

NNE wind around 15 kt, with gusts as high as 25 kt. A chance of snow before 4pm. Seas 1 ft or less.

Monday Night

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

Tuesday

NNW wind 5 to 10 kt becoming S in the afternoon. Sunny. Seas 1 ft or less.

Tuesday Night

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

Wednesday

SW wind around 10 kt becoming W in the afternoon. Winds could gust as high as 20 kt. Partly sunny. 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.