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3NM SE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 6:37 pm EDT Mar 14, 2026
Forecast Valid: 7pm EDT Mar 14, 2026-6pm EDT Mar 21, 2026

Tonight

WNW wind 15 to 20 kt, with gusts as high as 30 kt. Mostly clear. Seas 1 ft or less.

Sunday

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

Sunday Night

SSE wind 10 to 15 kt, with gusts as high as 25 kt. A slight chance of rain and snow between 1am and 2am, then a chance of rain. Seas 1 ft or less.

Monday

SSE wind around 20 kt, with gusts as high as 30 kt. Rain. Seas 1 ft or less.

Monday Night

S wind 20 to 25 kt, with gusts as high as 40 kt. Rain. Seas 1 ft or less.

Tuesday

W wind around 20 kt, with gusts as high as 30 kt. Rain likely before 8am. Seas 1 ft or less.

Tuesday Night

W wind around 15 kt, with gusts as high as 30 kt. Mostly clear. Seas 1 ft or less.

Wednesday

W wind 5 to 10 kt, with gusts as high as 20 kt. Sunny. Seas 1 ft or less.

Wednesday Night

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.