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Gray/Portland, ME Local Forecast Office

3NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 16 °F
WNW 10kt
< 1ft
Wednesday
High: 39 °F
S 15kt
< 1ft
Wednesday Night
Low: 29 °F
W 10kt
< 1ft
Thursday
High: 38 °F
W 15kt
< 1ft
Thursday Night
Low: 23 °F
W 10kt
< 1ft
Friday
High: 37 °F
NW 10kt
< 1ft
Friday Night
Low: 28 °F
SW 10kt
< 1ft
Saturday
High: 45 °F
SSW 10kt
< 1ft
Saturday Night
Low: 30 °F
SW 10kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:53 pm EST Feb 24, 2026
Forecast Valid: 4pm EST Feb 24, 2026-6pm EST Mar 3, 2026

View Nearby Observations

Detailed Forecast

Tonight

WNW wind 5 to 10 kt becoming SW after midnight. Winds could gust as high as 20 kt. Partly cloudy. Seas 1 ft or less.

Wednesday

S wind 10 to 15 kt, with gusts as high as 20 kt. Snow, mainly before 2pm. Seas 1 ft or less.

Wednesday Night

SW wind around 10 kt becoming W after midnight. Winds could gust as high as 20 kt. A slight chance of snow showers between 8pm and 9pm. Seas 1 ft or less.

Thursday

W wind 10 to 15 kt, with gusts as high as 25 kt. Sunny. Seas 1 ft or less.

Thursday Night

W wind 5 to 10 kt becoming NW after midnight. Partly cloudy. Seas 1 ft or less.

Friday

NW wind 5 to 10 kt becoming SW in the afternoon. Mostly sunny. Seas 1 ft or less.

Friday Night

SW wind 5 to 10 kt. Partly cloudy. Seas 1 ft or less.

Saturday

SSW wind around 10 kt, with gusts as high as 20 kt. Mostly sunny. Seas 1 ft or less.

Saturday Night

SW wind 5 to 10 kt becoming W after midnight. Partly cloudy. Seas 1 ft or less.

*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.