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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Wednesday
High: 38 °F
NNW 10kt⇓
3ft
Wednesday Night
Low: 31 °F
SW 10kt
3-4ft
Thursday
High: 37 °F
⇑WNW 15kt
3ft
Thursday Night
Low: 12 °F
WNW 20kt⇓
2-3ft
Friday
High: 27 °F
WNW 10kt
1-2ft
Friday Night
Low: 21 °F
SW 10kt
1ft
Saturday
High: 35 °F
Light Wind
1ft
Saturday Night
Low: 26 °F
Light Wind
1ft
Sunday
High: 34 °F
WNW 10kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 3:53 am EST Dec 3, 2025
Forecast Valid: 4am EST Dec 3, 2025-6pm EST Dec 9, 2025

View Nearby Observations

Detailed Forecast

Wednesday

NNW wind 7 to 10 kt becoming W 5 to 8 kt in the afternoon. Mostly cloudy, then gradually becoming sunny. Seas around 3 ft.

Wednesday Night

SW wind 5 to 10 kt. Mostly cloudy. Seas 3 to 4 ft.

Thursday

WSW wind 10 to 13 kt becoming WNW 12 to 15 kt in the afternoon. Winds could gust as high as 25 kt. A chance of rain and snow showers between 10am and 2pm, then a chance of snow showers after 2pm. Seas around 3 ft.

Thursday Night

WNW wind 17 to 20 kt decreasing to 15 to 18 kt after midnight. Winds could gust as high as 25 kt. Widespread freezing spray after 8pm. Mostly clear. Seas 2 to 3 ft.

Friday

WNW wind around 10 kt becoming SW in the afternoon. Widespread freezing spray before 11am. Mostly sunny. Seas 1 to 2 ft.

Friday Night

SW wind 5 to 10 kt becoming WNW after midnight. Mostly cloudy. Seas around 1 ft.

Saturday

Variable winds 5 kt or less. A chance of snow showers before 3pm, then a chance of rain showers between 3pm and 5pm. Seas around 1 ft.

Saturday Night

Variable winds 5 kt or less. Partly cloudy. Seas around 1 ft.

Sunday

WNW wind 5 to 10 kt. Mostly sunny. 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.