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Gray/Portland, ME Local Forecast Office

9NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

This Afternoon
High: 30 °F
E 15kt
1ft
Tonight
Low: 24 °F
⇑ENE 30kt
4ft
Monday
High: 29 °F
NE 25kt⇓
4-5ft
Monday Night
Low: 15 °F
⇑WNW 25kt
4-5ft
Tuesday
High: 24 °F
WNW 20kt⇓
3-4ft
Tuesday Night
Low: 14 °F
W 15kt
3ft
Wednesday
High: 24 °F
WNW 15kt
2-3ft
Wednesday Night
Low: 14 °F
WNW 15kt
2ft
Thursday
High: 23 °F
NNW 15kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 12:43 pm EST Jan 25, 2026
Forecast Valid: 3pm EST Jan 25, 2026-6pm EST Feb 1, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

E wind around 15 kt, with gusts as high as 20 kt. Snow. The snow could be heavy at times. Seas around 1 ft.

Tonight

ENE wind 20 to 25 kt increasing to 25 to 30 kt after midnight. Winds could gust as high as 40 kt. Snow. The snow could be heavy at times. Seas 2 ft building to 4 ft.

Monday

NE wind 22 to 25 kt becoming N 20 to 23 kt in the afternoon. Winds could gust as high as 35 kt. Snow. Widespread freezing spray after 9am. Seas 4 to 5 ft.

Monday Night

NNW wind 15 to 20 kt becoming WNW 20 to 25 kt after midnight. Winds could gust as high as 35 kt. Snow likely before 1am. Widespread freezing spray. Seas 4 to 5 ft.

Tuesday

WNW wind 15 to 20 kt becoming W 10 to 15 kt in the afternoon. Winds could gust as high as 30 kt. Widespread freezing spray. Mostly sunny. Seas 3 to 4 ft.

Tuesday Night

WSW wind around 15 kt becoming WNW after midnight. Winds could gust as high as 25 kt. Widespread freezing spray after 7pm. Mostly cloudy. Seas around 3 ft.

Wednesday

WNW wind around 15 kt, with gusts as high as 20 kt. Widespread freezing spray before 2pm. Sunny. Seas 2 to 3 ft.

Wednesday Night

WNW wind 10 to 15 kt. Mostly cloudy. Seas around 2 ft.

Thursday

NNW wind 10 to 15 kt, with gusts as high as 25 kt. Mostly cloudy. 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.