National Weather Service Forecast for: Belfast ME
Issued by: National Weather Service Gray/Portland, ME
Updated: 1:29 pm EDT Oct 6, 2026
 
This
Afternoon
This Afternoon: Sunny, with a high near 56. West wind around 15 mph, with gusts as high as 30 mph.
Sunny

 Tonight

Tonight: Areas of frost after 3am. Otherwise, clear, with a low around 34. Northwest wind around 5 mph becoming calm in the evening.
Clear then
Areas Frost

 Wednesday

Wednesday: Areas of frost before 9am. Otherwise, increasing clouds, with a high near 59. South wind 5 to 10 mph, with gusts as high as 20 mph.
Areas Frost
then
Increasing
Clouds
 Wednesday
Night
Wednesday Night: Mostly cloudy, with a low around 50. Southwest wind 5 to 10 mph.
Mostly Cloudy

 Thursday

Thursday: A chance of showers between 11am and 5pm. Partly sunny, with a high near 68. Southwest wind around 10 mph. Chance of precipitation is 30%.
Chance
Showers

 Thursday
Night
Thursday Night: Partly cloudy, with a low around 45.
Partly Cloudy

 Friday

Friday: Sunny, with a high near 62.
Sunny

 Friday
Night
Friday Night: Mostly clear, with a low around 42.
Mostly Clear

 Saturday

Saturday: Sunny, with a high near 59.
Sunny
Hi 56 °F Lo 34 °F Hi 59 °F Lo 50 °F Hi 68 °F Lo 45 °F Hi 62 °F Lo 42 °F Hi 59 °F

Frost Advisory
 

This Afternoon
 
 Sunny, with a high near 56. West wind around 15 mph, with gusts as high as 30 mph.
Tonight
 
 Areas of frost after 3am. Otherwise, clear, with a low around 34. Northwest wind around 5 mph becoming calm in the evening.
Wednesday
 
 Areas of frost before 9am. Otherwise, increasing clouds, with a high near 59. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
 
 Mostly cloudy, with a low around 50. Southwest wind 5 to 10 mph.
Thursday
 
 A chance of showers between 11am and 5pm. Partly sunny, with a high near 68. Southwest wind around 10 mph. Chance of precipitation is 30%.
Thursday Night
 
 Partly cloudy, with a low around 45.
Friday
 
 Sunny, with a high near 62.
Friday Night
 
 Mostly clear, with a low around 42.
Saturday
 
 Sunny, with a high near 59.
Saturday Night
 
 Mostly clear, with a low around 41.
Sunday
 
 Sunny, with a high near 62.
Sunday Night
 
 Partly cloudy, with a low around 50.
Columbus Day
 
 Mostly sunny, with a high near 68.

 

Forecast from NOAA-NWS for Belfast ME.