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Gray/Portland, ME Local Forecast Office

10NM S Portsmouth NH

Marine Point Forecast

[NOTICE]

Thursday
High: 39 °F
⇑W 20kt
3ft
Thursday Night
Low: 13 °F
WNW 20kt⇓
2-3ft
Friday
High: 26 °F
WNW 10kt
1-2ft
Friday Night
Low: 22 °F
Light Wind
1ft
Saturday
High: 36 °F
Light Wind
1ft
Saturday Night
Low: 28 °F
Light Wind
1ft
Sunday
High: 37 °F
Light Wind
1ft
Sunday Night
Low: 20 °F
NW 10kt
1ft
Monday
High: 25 °F
NW 15kt
1-2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 12:56 am EST Dec 4, 2025
Forecast Valid: 1am EST Dec 4, 2025-6pm EST Dec 10, 2025

View Nearby Observations

Detailed Forecast

Thursday

SW wind 10 to 15 kt becoming W 15 to 20 kt in the afternoon. Winds could gust as high as 25 kt. A chance of snow showers, mainly after 1pm. Seas around 3 ft.

Thursday Night

WNW wind 17 to 20 kt decreasing to 15 to 18 kt after midnight. Winds could gust as high as 30 kt. A slight chance of snow showers before 8pm. Seas 2 to 3 ft.

Friday

WNW wind 5 to 10 kt becoming SW in the afternoon. Sunny. Seas 1 to 2 ft.

Friday Night

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

Saturday

Variable winds 5 kt or less. Scattered snow showers before noon, then scattered rain and snow showers between noon and 3pm, then scattered rain showers after 3pm. Seas around 1 ft.

Saturday Night

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

Sunday

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

Sunday Night

NW wind 5 to 10 kt. Mostly cloudy. Seas around 1 ft.

Monday

NW wind 10 to 15 kt. Sunny. Seas 1 to 2 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.