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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Monday
High: 25 °F
NNE 20kt⇓
8ft
Monday Night
Low: 12 °F
⇑NW 15kt
7-8ft
Tuesday
High: 22 °F
WNW 15kt
5-6ft
Tuesday Night
Low: 10 °F
W 10kt
3-4ft
Wednesday
High: 23 °F
W 10kt
2-3ft
Wednesday Night
Low: 9 °F
WNW 10kt
1-2ft
Thursday
High: 21 °F
WNW 10kt
1ft
Thursday Night
Low: 5 °F
WNW 10kt
1ft
Friday
High: 19 °F
WNW 10kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 12:33 am EST Jan 26, 2026
Forecast Valid: 3am EST Jan 26, 2026-6pm EST Feb 1, 2026

View Nearby Observations

Detailed Forecast

Monday

NNE wind 17 to 20 kt decreasing to 15 to 18 kt in the afternoon. Winds could gust as high as 30 kt. Snow, mainly before 2pm. Widespread freezing spray before 3pm, then Widespread freezing spray between 4pm and 5pm. Seas 6 ft building to 8 ft.

Monday Night

N wind 10 to 13 kt becoming NW 12 to 15 kt in the evening. Winds could gust as high as 25 kt. Snow, mainly before 11pm. Widespread freezing spray after 7pm. Seas 7 to 8 ft.

Tuesday

WNW wind 10 to 15 kt becoming WSW in the afternoon. Widespread freezing spray before 2pm. Increasing clouds. Seas 5 to 6 ft.

Tuesday Night

W wind around 10 kt. Widespread freezing spray after 8pm. Mostly cloudy, then gradually becoming mostly clear. Seas 3 to 4 ft.

Wednesday

W wind around 10 kt. Widespread freezing spray before 2pm. Sunny. Seas 2 to 3 ft.

Wednesday Night

WNW wind around 10 kt. Mostly cloudy. Seas 1 to 2 ft.

Thursday

WNW wind around 10 kt. Mostly sunny. Seas around 1 ft.

Thursday Night

WNW wind around 10 kt. Mostly clear. Seas around 1 ft.

Friday

WNW wind around 10 kt. Sunny. Seas around 1 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.