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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 39 °F
SSW 20kt
3-4ft
Saturday
High: 44 °F
WNW 15kt⇓
3ft
Saturday Night
Low: 37 °F
⇑E 15kt
1-2ft
Sunday
High: 39 °F
W 15kt
2ft
Sunday Night
Low: 30 °F
⇑W 25kt
2-3ft
Monday
High: 37 °F
W 25kt⇓
2-3ft
Monday Night
Low: 34 °F
WSW 15kt
2ft
Tuesday
High: 42 °F
WSW 15kt
2ft
Tuesday Night
Low: 38 °F
SSW 20kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:11 pm EST Jan 9, 2026
Forecast Valid: 10pm EST Jan 9, 2026-6pm EST Jan 16, 2026

View Nearby Observations

Detailed Forecast

Tonight

SSW wind around 20 kt becoming W after midnight. Winds could gust as high as 30 kt. Mostly cloudy. Seas 3 to 4 ft.

Saturday

WNW wind 10 to 15 kt becoming N 5 to 8 kt in the morning. Winds could gust as high as 25 kt. Mostly cloudy. Seas 3 ft subsiding to 1 ft.

Saturday Night

E wind 10 to 13 kt increasing to 12 to 15 kt after midnight. Winds could gust as high as 25 kt. Rain, mainly after 7pm. Seas 1 to 2 ft.

Sunday

NE wind 10 to 15 kt becoming W in the afternoon. Winds could gust as high as 20 kt. Rain and sleet before 10am, then a chance of rain between 10am and 5pm, then a chance of rain and snow after 5pm. Seas around 2 ft.

Sunday Night

W wind 20 to 23 kt increasing to 22 to 25 kt after midnight. Winds could gust as high as 35 kt. A chance of snow before 7pm. Seas 2 to 3 ft.

Monday

W wind 20 to 25 kt decreasing to 15 to 20 kt in the afternoon. Winds could gust as high as 30 kt. Mostly sunny. Seas 2 to 3 ft.

Monday Night

WSW wind around 15 kt, with gusts as high as 25 kt. Mostly cloudy. Seas around 2 ft.

Tuesday

WSW wind around 15 kt, with gusts as high as 25 kt. Mostly sunny. Seas around 2 ft.

Tuesday Night

SSW wind 15 to 20 kt. Mostly cloudy. 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.