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Gray/Portland, ME Local Forecast Office

10NM S Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 38 °F
WNW 15kt
2ft
Tonight
Low: 28 °F
NW 10kt⇓
1ft
Tuesday
High: 39 °F
⇑ENE 10kt
1ft
Tuesday Night
Low: 31 °F
NNE 20kt
2-3ft
Wednesday
High: 36 °F
NW 15kt⇓
3ft
Wednesday Night
Low: 31 °F
SW 10kt
3ft
Thursday
High: 38 °F
⇑WNW 20kt
3ft
Thursday Night
Low: 15 °F
WNW 20kt⇓
2ft
Friday
High: 28 °F
WNW 10kt
1-2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 12:50 am EST Dec 1, 2025
Forecast Valid: 6am EST Dec 1, 2025-6pm EST Dec 7, 2025

View Nearby Observations

Detailed Forecast

Today

W wind 10 to 15 kt becoming NW in the afternoon. Winds could gust as high as 25 kt. Sunny. Seas around 2 ft.

Tonight

NW wind 5 to 10 kt becoming variable and less than 5 kt in the evening. Increasing clouds. Seas around 1 ft.

Tuesday

SW wind 5 to 8 kt becoming ENE 7 to 10 kt in the afternoon. Snow likely before 11am, then rain and snow likely between 11am and 1pm, then rain after 1pm. Seas around 1 ft.

Tuesday Night

NE wind 15 to 20 kt becoming NNW after midnight. Winds could gust as high as 25 kt. Rain and snow, mainly before 1am. Seas 2 to 3 ft.

Wednesday

NW wind 10 to 15 kt becoming WNW 5 to 8 kt in the afternoon. Sunny. Seas around 3 ft.

Wednesday Night

SW wind 5 to 10 kt. Mostly cloudy. Seas around 3 ft.

Thursday

SW wind 10 to 15 kt becoming WNW 15 to 20 kt in the afternoon. Winds could gust as high as 25 kt. Partly sunny. 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. Mostly clear. Seas around 2 ft.

Friday

WNW wind around 10 kt becoming WSW in the afternoon. Mostly 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.