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Gray/Portland, ME Local Forecast Office

10NM S Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 43 °F
E 10kt
1ft
Tonight
Low: 32 °F
N 20kt
2-3ft
Wednesday
High: 38 °F
NW 15kt⇓
3ft
Wednesday Night
Low: 32 °F
SW 10kt
3ft
Thursday
High: 38 °F
⇑W 20kt
2-3ft
Thursday Night
Low: 14 °F
NW 20kt⇓
2ft
Friday
High: 28 °F
WNW 10kt
1-2ft
Friday Night
Low: 24 °F
WSW 10kt
1ft
Saturday
High: 37 °F
Light Wind
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:14 am EST Dec 2, 2025
Forecast Valid: 9am EST Dec 2, 2025-6pm EST Dec 8, 2025

View Nearby Observations

Detailed Forecast

Today

SSE wind 5 to 10 kt becoming E in the afternoon. A chance of snow before 10am, then rain and snow likely between 10am and 11am, then rain after 11am. Seas around 1 ft.

Tonight

NE wind 15 to 20 kt becoming NNW after midnight. Winds could gust as high as 25 kt. Rain before 10pm, then rain, possibly mixed with snow. Seas 2 to 3 ft.

Wednesday

NW wind 10 to 15 kt becoming W 5 to 8 kt in the afternoon. Mostly sunny. Seas around 3 ft.

Wednesday Night

SW wind 5 to 10 kt. Mostly cloudy. Seas around 3 ft.

Thursday

WSW wind 10 to 15 kt becoming W 15 to 20 kt in the afternoon. Winds could gust as high as 25 kt. Mostly cloudy. Seas 2 to 3 ft.

Thursday Night

NW wind 17 to 20 kt decreasing to 15 to 18 kt after midnight. Winds could gust as high as 30 kt. Mostly clear. Seas around 2 ft.

Friday

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

Friday Night

WSW wind 5 to 10 kt. Mostly cloudy. Seas around 1 ft.

Saturday

Variable winds 5 kt or less. A chance of snow between 10am and 11am, then a chance of rain after 11am. 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.