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18NM NNE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 1:41 am EDT Jul 8, 2025
Forecast Valid: 2am EDT Jul 8, 2025-6pm EDT Jul 14, 2025

Tuesday

Variable winds 5 kt or less. Isolated showers between 10am and 11am, then scattered showers and thunderstorms after 11am. Seas 1 ft or less.

Tuesday Night

Variable winds 5 kt or less. Scattered showers and thunderstorms, mainly after 3am. Seas 1 ft or less.

Wednesday

Variable winds 5 kt or less. Scattered showers, mainly before 8am. Seas 1 ft or less.

Wednesday Night

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

Thursday

Variable winds 5 kt or less. Scattered showers after 8am. Seas 1 ft or less.

Thursday Night

Variable winds 5 kt or less. Scattered showers before 2am. Seas 1 ft or less.

Friday

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

Friday Night

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

Saturday

Variable winds 5 kt or less. Partly 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.