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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Overnight
Low: 23 °F
Light Wind
1ft
Saturday
High: 38 °F
Light Wind
1ft
Saturday Night
Low: 29 °F
W 10kt
1ft
Sunday
High: 35 °F
NW 10kt
1ft
Sunday Night
Low: 23 °F
NNW 10kt
1-2ft
Monday
High: 26 °F
NW 15kt
2ft
Monday Night
Low: 15 °F
NW 10kt
2ft
Tuesday
High: 31 °F
SW 10kt
2ft
Tuesday Night
Low: 28 °F
WSW 10kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:16 pm EST Dec 5, 2025
Forecast Valid: 12am EST Dec 6, 2025-6pm EST Dec 12, 2025

View Nearby Observations

Detailed Forecast

Overnight

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

Saturday

Variable winds 5 kt or less. A chance of rain and snow showers before 1pm, then a slight chance of rain showers between 1pm and 4pm. Seas around 1 ft.

Saturday Night

WSW wind 5 to 10 kt becoming W after midnight. Partly cloudy. Seas around 1 ft.

Sunday

NW wind 5 to 10 kt. Partly sunny. Seas around 1 ft.

Sunday Night

NNW wind 5 to 10 kt. A chance of snow after 11pm. Seas 1 to 2 ft.

Monday

NW wind 10 to 15 kt. Mostly sunny. Seas around 2 ft.

Monday Night

NW wind around 10 kt. Mostly clear. Seas around 2 ft.

Tuesday

WNW wind 5 to 10 kt becoming SW in the afternoon. Mostly sunny. Seas around 2 ft.

Tuesday Night

WSW wind around 10 kt. A chance of snow showers. Seas around 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.