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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 16 °F
W 20kt
2-3ft
Wednesday
High: 36 °F
SSW 15kt
2-3ft
Wednesday Night
Low: 30 °F
SSW 20kt
3ft
Thursday
High: 41 °F
WSW 20kt
3ft
Thursday Night
Low: 27 °F
W 20kt
2ft
Friday
High: 28 °F
W 20kt
2-3ft
Friday Night
Low: 8 °F
WNW 25kt
3ft
Saturday
High: 13 °F
WNW 20kt
2ft
Saturday Night
Low: 10 °F
WNW 15kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 12:42 pm EST Jan 20, 2026
Forecast Valid: 4pm EST Jan 20, 2026-6pm EST Jan 27, 2026

View Nearby Observations

Detailed Forecast

Tonight

W wind 15 to 20 kt, with gusts as high as 30 kt. Widespread freezing spray. Mostly clear. Seas 2 to 3 ft.

Wednesday

WSW wind around 15 kt becoming SSW in the afternoon. Winds could gust as high as 25 kt. A slight chance of snow after 5pm. Widespread freezing spray before 1pm. Seas 2 to 3 ft.

Wednesday Night

SSW wind around 20 kt, with gusts as high as 30 kt. A chance of snow, mainly before 5am. Seas around 3 ft.

Thursday

WSW wind around 20 kt, with gusts as high as 25 kt. Mostly sunny. Seas around 3 ft.

Thursday Night

W wind around 20 kt, with gusts as high as 25 kt. Partly cloudy. Seas around 2 ft.

Friday

W wind 15 to 20 kt, with gusts as high as 30 kt. Partly sunny. Seas 2 to 3 ft.

Friday Night

WNW wind 20 to 25 kt, with gusts as high as 30 kt. Widespread freezing spray after 8pm. Partly cloudy. Seas around 3 ft.

Saturday

WNW wind 15 to 20 kt, with gusts as high as 30 kt. Widespread freezing spray. Sunny. Seas around 2 ft.

Saturday Night

WNW wind around 15 kt, with gusts as high as 25 kt. Widespread freezing spray. Mostly cloudy. Seas around 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.