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3NM SE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 6:50 am EDT Apr 30, 2026
Forecast Valid: 11am EDT Apr 30, 2026-6pm EDT May 6, 2026

Today

Variable winds 5 kt or less. Showers, mainly before 3pm. Seas 1 ft or less.

Tonight

Variable winds 5 kt or less. A slight chance of showers, mainly between 10pm and 2am. Seas 1 ft or less.

Friday

WNW wind around 10 kt. Mostly sunny. Seas 1 ft or less.

Friday Night

Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.

Saturday

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

Saturday Night

Variable winds 5 kt or less. A chance of showers before 1am. Seas 1 ft or less.

Sunday

N wind 5 to 10 kt. A chance of showers before noon. Seas 1 ft or less.

Sunday Night

W wind around 10 kt. Mostly clear. Seas 1 ft or less.

Monday

WSW wind around 10 kt becoming SSW in the afternoon. Winds could gust as high as 20 kt. Mostly sunny. Seas 1 ft or less.

Winds and seas higher in and near tstms.

*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.