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Gray/Portland, ME Local Forecast Office

12NM NE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 6 °F
NW 10kt⇓
2ft
Tuesday
High: 32 °F
Light Wind
1-2ft
Tuesday Night
Low: 27 °F
SSW 10kt
2-3ft
Wednesday
High: 42 °F
SSW 15kt
3ft
Wednesday Night
Low: 35 °F
SSW 15kt
3ft
Thursday
High: 39 °F
W 15kt
2-3ft
Thursday Night
Low: 24 °F
W 15kt
2ft
Friday
High: 32 °F
W 15kt
2ft
Friday Night
Low: 25 °F
W 10kt
1-2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 12:20 pm EST Dec 8, 2025
Forecast Valid: 6pm EST Dec 8, 2025-6pm EST Dec 15, 2025

View Nearby Observations

Detailed Forecast

Tonight

NW wind 7 to 10 kt decreasing to 5 to 8 kt after midnight. Mostly clear. Seas around 2 ft.

Tuesday

Variable winds 5 kt or less. Increasing clouds. Seas 1 to 2 ft.

Tuesday Night

SSW wind around 10 kt. A chance of rain and snow showers before 4am, then a slight chance of rain showers between 4am and 5am, then a chance of rain and snow showers after 5am. Seas 2 to 3 ft.

Wednesday

SSW wind 10 to 15 kt. A chance of rain and snow before noon, then rain. Seas around 3 ft.

Wednesday Night

SSW wind 10 to 15 kt. Rain likely before 1am. Seas around 3 ft.

Thursday

W wind 10 to 15 kt, with gusts as high as 20 kt. Mostly sunny. Seas 2 to 3 ft.

Thursday Night

W wind around 15 kt. Partly cloudy. Seas around 2 ft.

Friday

W wind 10 to 15 kt. Mostly sunny. Seas around 2 ft.

Friday Night

W wind around 10 kt. Partly cloudy. 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.