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8NM SE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 12:24 pm EDT Apr 19, 2026
Forecast Valid: 1pm EDT Apr 19, 2026-6pm EDT Apr 25, 2026

This Afternoon

W wind 5 to 8 kt becoming WNW 7 to 10 kt. Rain and possibly a thunderstorm. Patchy fog before 2pm. Seas around 2 ft.

Tonight

W wind 12 to 15 kt decreasing to 10 to 13 kt after midnight. Winds could gust as high as 25 kt. Rain likely, mainly before 8pm. Seas around 2 ft.

Monday

W wind around 10 kt. A chance of showers, mainly after 2pm. Seas 1 to 2 ft.

Monday Night

N wind 10 to 15 kt. Partly cloudy. Seas 1 to 2 ft.

Tuesday

N wind 5 to 10 kt becoming SE in the afternoon. Sunny. Seas around 1 ft.

Tuesday Night

SSE wind 10 to 15 kt becoming SSW after midnight. Partly cloudy. Seas 2 to 3 ft.

Wednesday

SSW wind around 10 kt. Mostly cloudy. Seas around 2 ft.

Wednesday Night

S wind around 10 kt becoming WSW after midnight. Mostly cloudy. Seas around 2 ft.

Thursday

W wind 5 to 10 kt becoming NW in the morning. Partly sunny. Seas around 1 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.