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Gray/Portland, ME Local Forecast Office

9NM ESE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 30 °F
NW 20kt
3ft
Friday
High: 41 °F
S 15kt
2ft
Friday Night
Low: 37 °F
S 25kt
4ft
Saturday
High: 43 °F
W 25kt
4ft
Saturday Night
Low: 31 °F
WNW 20kt⇓
2-3ft
Sunday
High: 41 °F
NW 10kt
1ft
Sunday Night
Low: 38 °F
⇑SSE 20kt
4ft
Monday
High: 52 °F
SSE 30kt
7ft
Monday Night
Low: 39 °F
S 30kt
7-8ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:28 pm EDT Mar 12, 2026
Forecast Valid: 7pm EDT Mar 12, 2026-6pm EDT Mar 19, 2026

View Nearby Observations

Detailed Forecast

Tonight

NW wind 15 to 20 kt. A chance of snow, mainly before 8pm. Seas around 3 ft.

Friday

WNW wind 10 to 15 kt becoming S in the afternoon. Winds could gust as high as 20 kt. A slight chance of rain and snow after 5pm. Seas around 2 ft.

Friday Night

S wind 20 to 25 kt, with gusts as high as 30 kt. A chance of rain and snow before 8pm, then a chance of snow between 8pm and 11pm, then a chance of rain after 11pm. Seas around 4 ft.

Saturday

W wind 20 to 25 kt, with gusts as high as 30 kt. A chance of rain before 9am. Seas around 4 ft.

Saturday 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 2 to 3 ft.

Sunday

NW wind 5 to 10 kt becoming SE in the afternoon. Mostly cloudy. Seas around 1 ft.

Sunday Night

SSE wind 15 to 18 kt increasing to 17 to 20 kt after midnight. Winds could gust as high as 30 kt. A chance of rain after 2am. Seas 2 ft building to 4 ft.

Monday

SSE wind 25 to 30 kt, with gusts as high as 40 kt. Rain. Seas 5 ft building to 7 ft.

Monday Night

S wind around 30 kt, with gusts as high as 45 kt. Rain. Seas 7 to 8 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.