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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 40 °F
⇑S 20kt
4ft
Tonight
Low: 31 °F
W 15kt
2-3ft
Thursday
High: 37 °F
W 15kt⇓
2ft
Thursday Night
Low: 26 °F
W 10kt
2ft
Friday
High: 37 °F
SSW 10kt
1-2ft
Friday Night
Low: 33 °F
SSW 15kt
2ft
Saturday
High: 44 °F
SSW 15kt
3ft
Saturday Night
Low: 30 °F
SW 15kt
2-3ft
Sunday
High: 35 °F
WNW 15kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:06 am EST Feb 25, 2026
Forecast Valid: 6am EST Feb 25, 2026-6pm EST Mar 3, 2026

View Nearby Observations

Detailed Forecast

Today

S wind 10 to 15 kt increasing to 15 to 20 kt. Winds could gust as high as 25 kt. Rain and snow before 2pm, then a slight chance of rain between 2pm and 3pm. Seas 2 ft building to 4 ft.

Tonight

SW wind around 15 kt becoming W after midnight. Winds could gust as high as 25 kt. Partly cloudy. Seas 2 to 3 ft.

Thursday

W wind 12 to 15 kt decreasing to 10 to 13 kt in the afternoon. Winds could gust as high as 25 kt. Increasing clouds. Seas around 2 ft.

Thursday Night

W wind around 10 kt becoming NW after midnight. Partly cloudy. Seas around 2 ft.

Friday

NW wind 5 to 10 kt becoming SSW in the afternoon. Sunny. Seas 1 to 2 ft.

Friday Night

SSW wind around 15 kt. Mostly clear. Seas around 2 ft.

Saturday

SSW wind around 15 kt, with gusts as high as 25 kt. Mostly sunny. Seas around 3 ft.

Saturday Night

SW wind around 15 kt becoming WNW after midnight. Partly cloudy. Seas 2 to 3 ft.

Sunday

WNW wind 10 to 15 kt, with gusts as high as 20 kt. Partly sunny. 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.