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Gray/Portland, ME Local Forecast Office

10NM S Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 38 °F
NW 10kt
3-4ft
Tonight
Low: 33 °F
SW 10kt
4ft
Thursday
High: 38 °F
⇑WNW 20kt
3ft
Thursday Night
Low: 15 °F
WNW 25kt⇓
2-3ft
Friday
High: 28 °F
WNW 15kt
2ft
Friday Night
Low: 24 °F
SW 10kt
1ft
Saturday
High: 35 °F
Light Wind
1ft
Saturday Night
Low: 28 °F
W 10kt
1ft
Sunday
High: 35 °F
WNW 10kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:13 am EST Dec 3, 2025
Forecast Valid: 11am EST Dec 3, 2025-6pm EST Dec 9, 2025

View Nearby Observations

Detailed Forecast

Today

NW wind 5 to 10 kt becoming W in the afternoon. Mostly sunny. Seas 3 to 4 ft.

Tonight

SW wind 5 to 10 kt. Mostly cloudy. Seas around 4 ft.

Thursday

WSW wind 10 to 15 kt becoming WNW 15 to 20 kt in the afternoon. Winds could gust as high as 30 kt. A chance of rain and snow showers before 3pm, then a chance of snow showers. Seas around 3 ft.

Thursday Night

WNW wind 20 to 25 kt decreasing to 15 to 20 kt after midnight. Winds could gust as high as 30 kt. Widespread freezing spray after 9pm. Mostly clear. Seas 2 to 3 ft.

Friday

WNW wind 10 to 15 kt becoming SW in the afternoon. Widespread freezing spray before 11am. Mostly sunny. Seas around 2 ft.

Friday Night

SW wind 5 to 10 kt becoming WNW after midnight. Mostly cloudy. Seas around 1 ft.

Saturday

Variable winds 5 kt or less. A chance of snow showers before 3pm, then a chance of rain showers between 3pm and 5pm. Seas around 1 ft.

Saturday Night

W wind 5 to 10 kt. Partly cloudy. Seas around 1 ft.

Sunday

WNW wind around 10 kt. Mostly 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.