Last Update: 631 PM EST Mon Dec 15 2025

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Gray/Portland, ME Local Forecast Office

25NM ENE Portsmouth NH

Marine Zone Forecast


Rest Of Tonight
W winds 15 to 20 kt, diminishing to 10 to 15 kt. Gusts up to 30 kt. Seas 3 to 5 ft. Wave detail: W 4 ft at 4 seconds and NE 2 ft at 5 seconds.
Tue
W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave detail: W 2 ft at 3 seconds.
Tue Night
SW winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Gusts up to 35 kt. Seas 3 to 5 ft. Wave detail: S 5 ft at 5 seconds.
Wed
SW winds 20 to 25 kt with gusts up to 40 kt. Seas 5 to 7 ft. Wave detail: S 7 ft at 6 seconds.
Wed Night
W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 30 kt. Seas 4 to 6 ft. Wave detail: SW 5 ft at 7 seconds and S 4 ft at 8 seconds.
Thu
SW winds 10 to 15 kt with gusts up to 20 kt, becoming S 15 to 20 kt with gusts up to 30 kt in the afternoon. Seas 2 to 3 ft, building to 3 to 5 ft in the afternoon. Wave detail: SE 3 ft at 10 seconds and SW 2 ft at 3 seconds, becoming S 4 ft at 4 seconds.
Thu Night
S winds 25 to 35 kt with gusts up to 45 kt. Seas 4 to 6 ft, building to 7 to 10 ft after midnight. A chance of rain in the evening, then rain likely after midnight.
Fri
S winds 30 to 35 kt, becoming SW in the afternoon. Gusts up to 45 kt. Seas 7 to 10 ft. Rain.
Fri Night
W winds 25 to 30 kt with gusts up to 45 kt. Seas 8 to 11 ft. A chance of rain in the evening.
Sat
W winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 35 kt. Seas 5 to 8 ft.
Sat Night
SW winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to 7 ft. A chance of rain and snow after midnight.



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631 PM EST Mon Dec 15 2025
 
 

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