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Gray/Portland, ME Local Forecast Office

4NM E Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 34 °F
Light Wind
1-2ft
Sunday
High: 39 °F
SE 15kt
1-2ft
Sunday Night
Low: 32 °F
⇑NNE 15kt
2ft
Monday
High: 37 °F
NNE 15kt
2-3ft
Monday Night
Low: 29 °F
NNW 10kt
3-4ft
Tuesday
High: 40 °F
Light Wind
4ft
Tuesday Night
Low: 32 °F
SW 10kt
4ft
Wednesday
High: 44 °F
WSW 15kt
2-3ft
Wednesday Night
Low: 32 °F
WNW 10kt
1-2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:26 pm EDT Mar 21, 2026
Forecast Valid: 6pm EDT Mar 21, 2026-6pm EDT Mar 28, 2026

View Nearby Observations

Detailed Forecast

Tonight

Variable winds 5 kt or less. A slight chance of snow after 5am. Seas 1 to 2 ft.

Sunday

SE wind 10 to 15 kt. Rain and snow, becoming all rain after 2pm. Seas 1 to 2 ft.

Sunday Night

NNE wind 10 to 13 kt increasing to 12 to 15 kt after midnight. Winds could gust as high as 20 kt. Rain likely before 3am, then snow likely. Seas around 2 ft.

Monday

NNE wind around 15 kt, with gusts as high as 20 kt. Snow likely, mainly before 8am. Seas 2 to 3 ft.

Monday Night

NNW wind around 10 kt. A chance of snow before 1am. Seas 3 to 4 ft.

Tuesday

Variable winds 5 kt or less. Mostly sunny. Seas around 4 ft.

Tuesday Night

SW wind around 10 kt. Partly cloudy. Seas around 4 ft.

Wednesday

WSW wind 10 to 15 kt. Partly sunny. Seas 2 to 3 ft.

Wednesday Night

W wind around 10 kt becoming NE after midnight. Mostly cloudy. Seas 1 to 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.