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Gray/Portland, ME Local Forecast Office

10NM S Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 6 °C
SSW 25km/h
1-2m
Sunday
High: 12 °C
SW 20km/h
1m
Sunday Night
Low: 4 °C
SW 20km/h
1m
Monday
High: 13 °C
⇑SSW 25km/h
1m
Monday Night
Low: 6 °C
SW 25km/h⇓
1m
Tuesday
High: 16 °C
S 15km/h
1m
Tuesday Night
Low: 5 °C
E 20km/h
1m
Wednesday
High: 10 °C
SE 25km/h
1m
Wednesday Night
Low: 6 °C
⇑S 35km/h
1-2m

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:48 pm EST Mar 7, 2026
Forecast Valid: 6pm EST Mar 7, 2026-6pm EDT Mar 14, 2026

View Nearby Observations

Detailed Forecast

Tonight

SSW wind 20 to 25 km/h, with gusts as high as 35 km/h. A chance of rain between midnight and 4am. Patchy fog between 9pm and 10pm. Seas 1 to 2 m.

Sunday

SW wind around 20 km/h becoming W in the afternoon. Winds could gust as high as 35 km/h. Cloudy through mid morning, then gradual clearing. Seas around 1 m.

Sunday Night

SW wind 15 to 20 km/h, with gusts as high as 30 km/h. Mostly clear. Seas around 1 m.

Monday

SSW wind 15 to 20 km/h increasing to 20 to 25 km/h in the afternoon. Winds could gust as high as 35 km/h. Mostly sunny. Seas around 1 m.

Monday Night

SW wind 20 to 25 km/h decreasing to 15 to 20 km/h after midnight. Winds could gust as high as 35 km/h. Mostly clear. Seas around 1 m.

Tuesday

WSW wind 10 to 15 km/h becoming S in the afternoon. Sunny. Seas around 1 m.

Tuesday Night

S wind 15 to 20 km/h becoming E after midnight. Partly cloudy. Seas around 1 m.

Wednesday

E wind 20 to 25 km/h becoming SSE in the afternoon. Winds could gust as high as 35 km/h. A chance of rain. Seas around 1 m.

Wednesday Night

S wind 25 to 30 km/h increasing to 30 to 35 km/h in the evening. Winds could gust as high as 50 km/h. A chance of rain. Seas 1 to 2 m.

*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.