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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 30 °F
SSW 20kt
3ft
Thursday
High: 42 °F
SW 20kt
3ft
Thursday Night
Low: 26 °F
W 20kt
3ft
Friday
High: 30 °F
⇑WSW 25kt
2-3ft
Friday Night
Low: 7 °F
W 25kt
3ft
Saturday
High: 14 °F
WNW 20kt
2-3ft
Saturday Night
Low: 10 °F
WNW 20kt
2ft
Sunday
High: 22 °F
NE 15kt
1-2ft
Sunday Night
Low: 19 °F
NE 20kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:26 pm EST Jan 21, 2026
Forecast Valid: 7pm EST Jan 21, 2026-6pm EST Jan 28, 2026

View Nearby Observations

Detailed Forecast

Tonight

SSW wind around 20 kt. A chance of snow before 11pm, then a chance of rain and snow between 11pm and 1am, then a chance of rain after 1am. Seas around 3 ft.

Thursday

SW wind 15 to 20 kt becoming W in the afternoon. Mostly sunny. Seas around 3 ft.

Thursday Night

W wind around 20 kt, with gusts as high as 30 kt. Partly cloudy. Seas around 3 ft.

Friday

WSW wind 20 to 23 kt increasing to 22 to 25 kt in the afternoon. Winds could gust as high as 35 kt. Mostly sunny. Seas 2 to 3 ft.

Friday Night

W wind around 25 kt becoming NW after midnight. Winds could gust as high as 35 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 2 to 3 ft.

Saturday Night

WNW wind 15 to 20 kt. Widespread freezing spray. Mostly cloudy. Seas around 2 ft.

Sunday

NNW wind 10 to 15 kt becoming NE in the afternoon. Winds could gust as high as 25 kt. Snow likely. Widespread freezing spray. Seas 1 to 2 ft.

Sunday Night

NE wind around 20 kt, with gusts as high as 30 kt. Snow likely. 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.