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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 13 °F
NW 15kt⇓
4-5ft
Monday
High: 30 °F
NW 10kt
7ft
Monday Night
Low: 13 °F
NW 10kt
5-6ft
Tuesday
High: 31 °F
Light Wind
3-4ft
Tuesday Night
Low: 17 °F
Light Wind
2-3ft
Wednesday
High: 31 °F
W 10kt
1-2ft
Wednesday Night
Low: 14 °F
WNW 10kt
1ft
Thursday
High: 28 °F
Light Wind
1ft
Thursday Night
Low: 13 °F
Light Wind
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:04 pm EST Feb 1, 2026
Forecast Valid: 6pm EST Feb 1, 2026-6pm EST Feb 8, 2026

View Nearby Observations

Detailed Forecast

Tonight

NW wind 12 to 15 kt decreasing to 10 to 13 kt after midnight. Winds could gust as high as 25 kt. Widespread freezing spray after 9pm. Mostly cloudy. Seas 4 to 5 ft.

Monday

NW wind 5 to 10 kt. Widespread freezing spray before 11am. Mostly sunny. Seas 5 ft building to 7 ft.

Monday Night

NW wind 5 to 10 kt. Mostly clear. Seas 5 to 6 ft.

Tuesday

Variable winds 5 kt or less. Widespread freezing spray before 8am. Sunny. Seas 3 to 4 ft.

Tuesday Night

Variable winds 5 kt or less. Partly cloudy. Seas 2 to 3 ft.

Wednesday

W wind 5 to 10 kt. Widespread freezing spray before 8am. Mostly sunny. Seas 1 to 2 ft.

Wednesday Night

WNW wind around 10 kt. Mostly clear. Seas around 1 ft.

Thursday

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

Thursday Night

Variable winds 5 kt or less. Partly cloudy. 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.