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18NM NNE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 8:13 am EST Mar 6, 2026
Forecast Valid: 9am EST Mar 6, 2026-6pm EDT Mar 12, 2026

Today

NE wind 5 to 10 kt. A chance of snow before 1pm. Patchy fog after 1pm. Seas 1 ft or less.

Tonight

Variable winds 5 kt or less. Patchy fog after 9pm. Seas 1 ft or less.

Saturday

SSW wind 5 to 10 kt. Areas of showers, mainly before 8am. Patchy fog before 10am. Seas 1 ft or less.

Saturday Night

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

Sunday

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

Sunday Night

Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.

Monday

SSW wind 5 to 10 kt. Sunny. Seas 1 ft or less.

Monday Night

Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.

Tuesday

Variable winds 5 kt or less. 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.