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8NM SE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 6:37 am EDT Mar 14, 2026
Forecast Valid: 10am EDT Mar 14, 2026-6pm EDT Mar 20, 2026

Today

W wind 15 to 20 kt, with gusts as high as 30 kt. Sunny early, then becoming mostly cloudy. Seas 3 to 4 ft.

Tonight

W wind 20 to 25 kt decreasing to 15 to 20 kt after midnight. Winds could gust as high as 30 kt. Mostly clear. Seas around 3 ft.

Sunday

NW wind 5 to 10 kt becoming variable and less than 5 kt. Partly sunny. Seas 1 to 2 ft.

Sunday Night

SSE wind around 15 kt, with gusts as high as 25 kt. A chance of rain after 3am. Seas 2 to 3 ft.

Monday

SE wind around 20 kt, with gusts as high as 30 kt. Rain, mainly after 7am. Seas 4 ft building to 6 ft.

Monday Night

S wind around 25 kt, with gusts as high as 40 kt. Rain. Seas 7 to 8 ft.

Tuesday

WSW wind 20 to 23 kt increasing to 22 to 25 kt in the morning. Winds could gust as high as 35 kt. Partly sunny. Seas 7 ft subsiding to 5 ft.

Tuesday Night

W wind 20 to 25 kt, with gusts as high as 35 kt. Mostly clear. Seas 4 to 5 ft.

Wednesday

WNW wind 15 to 20 kt decreasing to 10 to 15 kt in the afternoon. Mostly sunny. Seas 3 to 4 ft.

*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.