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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 27 °F
Light Wind
1ft
Tuesday
High: 40 °F
E 10kt
1ft
Tuesday Night
Low: 30 °F
N 15kt
2-3ft
Wednesday
High: 37 °F
NW 10kt⇓
3-4ft
Wednesday Night
Low: 31 °F
SW 10kt
4ft
Thursday
High: 38 °F
⇑W 20kt
3ft
Thursday Night
Low: 13 °F
WNW 20kt⇓
2-3ft
Friday
High: 28 °F
WNW 10kt
1-2ft
Friday Night
Low: 23 °F
SW 10kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:23 pm EST Dec 1, 2025
Forecast Valid: 10pm EST Dec 1, 2025-6pm EST Dec 8, 2025

View Nearby Observations

Detailed Forecast

Tonight

Variable winds 5 kt or less. Increasing clouds. Seas around 1 ft.

Tuesday

SSW wind 5 to 10 kt becoming E in the afternoon. Rain and snow, becoming all rain after noon. Seas around 1 ft.

Tuesday Night

NE wind 10 to 15 kt becoming NNW after midnight. Winds could gust as high as 20 kt. Rain before 11pm, then rain and snow likely between 11pm and 4am, then a slight chance of snow after 4am. Seas 2 to 3 ft.

Wednesday

NW wind 7 to 10 kt becoming W 5 to 8 kt in the afternoon. Mostly sunny. Seas 3 to 4 ft.

Wednesday Night

SW wind 5 to 10 kt. Mostly cloudy. Seas around 4 ft.

Thursday

SW wind 10 to 15 kt becoming W 15 to 20 kt in the afternoon. A chance of snow showers between noon and 4pm. Seas around 3 ft.

Thursday Night

WNW wind 15 to 20 kt decreasing to 10 to 15 kt after midnight. Winds could gust as high as 25 kt. Mostly clear. Seas 2 to 3 ft.

Friday

WNW wind around 10 kt becoming WSW in the afternoon. Sunny. Seas 1 to 2 ft.

Friday Night

SW wind 5 to 10 kt. Mostly cloudy. Seas around 1 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.