For More Weather Information:

Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 40 °F
⇑S 20kt
4ft
Thursday
High: 46 °F
SSW 20kt
3-4ft
Thursday Night
Low: 31 °F
WNW 20kt
3ft
Friday
High: 41 °F
⇑S 15kt
2-3ft
Friday Night
Low: 39 °F
S 25kt
4-5ft
Saturday
High: 43 °F
W 25kt
4-5ft
Saturday Night
Low: 31 °F
W 25kt⇓
2-3ft
Sunday
High: 41 °F
WNW 10kt
1ft
Sunday Night
Low: 38 °F
⇑SE 25kt
5ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:38 pm EDT Mar 11, 2026
Forecast Valid: 6pm EDT Mar 11, 2026-6pm EDT Mar 18, 2026

View Nearby Observations

Detailed Forecast

Tonight

ESE wind 5 to 8 kt becoming S 15 to 20 kt. Winds could gust as high as 30 kt. Showers and thunderstorms likely, mainly before 3am. Seas 2 ft building to 4 ft.

Thursday

SSW wind around 20 kt becoming W in the afternoon. Winds could gust as high as 25 kt. Rain showers likely before 5pm, then a chance of rain and snow showers. Seas 3 to 4 ft.

Thursday Night

WNW wind 15 to 20 kt, with gusts as high as 30 kt. A chance of snow showers, mainly before 7pm. Seas around 3 ft.

Friday

W wind 10 to 13 kt becoming S 12 to 15 kt in the afternoon. Winds could gust as high as 20 kt. Increasing clouds. Seas 2 to 3 ft.

Friday Night

S wind 20 to 25 kt. A chance of rain and snow before midnight, then a chance of rain between midnight and 1am. Seas 4 to 5 ft.

Saturday

W wind 20 to 25 kt, with gusts as high as 30 kt. Mostly sunny. Seas 4 to 5 ft.

Saturday Night

W wind 20 to 25 kt decreasing to 15 to 20 kt after midnight. Winds could gust as high as 30 kt. Partly cloudy. Seas 2 to 3 ft.

Sunday

WNW wind 5 to 10 kt becoming SSE in the afternoon. Mostly cloudy. Seas around 1 ft.

Sunday Night

SE wind 15 to 20 kt increasing to 20 to 25 kt after midnight. Winds could gust as high as 30 kt. Rain likely. Seas 2 ft building to 5 ft.

Winds and seas higher in and near tstms.

*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.