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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 29 °F
E 10kt
1ft
Tonight
Low: 20 °F
⇑ENE 20kt
5ft
Monday
High: 26 °F
NE 20kt⇓
8ft
Monday Night
Low: 13 °F
WNW 15kt
7-8ft
Tuesday
High: 22 °F
WNW 15kt
7ft
Tuesday Night
Low: 10 °F
WNW 10kt
3-4ft
Wednesday
High: 23 °F
WNW 10kt
2ft
Wednesday Night
Low: 11 °F
W 10kt
1-2ft
Thursday
High: 21 °F
NW 10kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 12:17 am EST Jan 25, 2026
Forecast Valid: 5am EST Jan 25, 2026-6pm EST Jan 31, 2026

View Nearby Observations

Detailed Forecast

Today

NNW wind 5 to 10 kt becoming E in the afternoon. Snow, mainly after 1pm. The snow could be heavy at times. Widespread freezing spray before 11am. Seas around 1 ft.

Tonight

E wind 15 to 18 kt becoming ENE 17 to 20 kt after midnight. Winds could gust as high as 30 kt. Snow. The snow could be heavy at times. Widespread freezing spray between 10pm and 11pm. Seas 1 ft building to 5 ft.

Monday

NE wind 17 to 20 kt becoming N 15 to 18 kt in the afternoon. Winds could gust as high as 25 kt. Snow. Widespread freezing spray between 8am and 1pm. Seas 6 ft building to 8 ft.

Monday Night

NNW wind 10 to 15 kt becoming WNW after midnight. Winds could gust as high as 25 kt. Snow likely before 2am. Widespread freezing spray. Seas 7 to 8 ft.

Tuesday

WNW wind 10 to 15 kt. Widespread freezing spray before 3pm. Mostly sunny. Seas 7 ft subsiding to 5 ft.

Tuesday Night

WNW wind around 10 kt. Widespread freezing spray. Partly cloudy. Seas 3 to 4 ft.

Wednesday

WNW wind around 10 kt. Widespread freezing spray. Sunny. Seas around 2 ft.

Wednesday Night

W wind around 10 kt. Widespread freezing spray. Mostly cloudy. Seas 1 to 2 ft.

Thursday

NW wind around 10 kt. Partly 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.