National Weather Service Forecast for: Belfast ME
Issued by: National Weather Service Gray/Portland, ME
Updated: 10:26 pm EDT Jun 18, 2026
 
Overnight

Overnight: Partly cloudy, with a low around 54. Southwest wind 5 to 10 mph.
Partly Cloudy

 Juneteenth

Juneteenth: Mostly sunny, with a high near 78. West wind 10 to 15 mph, with gusts as high as 25 mph.
Mostly Sunny

 Friday
Night
Friday Night: Mostly clear, with a low around 55. West wind 5 to 10 mph.
Mostly Clear

 Saturday

Saturday: A 40 percent chance of showers. Partly sunny, with a high near 73. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Chance
Showers
 Saturday
Night
Saturday Night: Mostly cloudy, with a low around 53. Northwest wind around 5 mph becoming calm in the evening.
Mostly Cloudy

 Sunday

Sunday: A 40 percent chance of showers after 10am. Partly sunny, with a high near 73.
Chance
Showers
 Sunday
Night
Sunday Night: Partly cloudy, with a low around 52.
Partly Cloudy

 Monday

Monday: A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 73.
Mostly Sunny
then Chance
Showers
 Monday
Night
Monday Night: Showers likely, mainly after 9pm. Mostly cloudy, with a low around 53. Chance of precipitation is 70%.
Showers
Likely
Lo 54 °F Hi 78 °F Lo 55 °F Hi 73 °F Lo 53 °F Hi 73 °F Lo 52 °F Hi 73 °F Lo 53 °F

 

Overnight
 
 Partly cloudy, with a low around 54. Southwest wind 5 to 10 mph.
Juneteenth
 
 Mostly sunny, with a high near 78. West wind 10 to 15 mph, with gusts as high as 25 mph.
Friday Night
 
 Mostly clear, with a low around 55. West wind 5 to 10 mph.
Saturday
 
 A 40 percent chance of showers. Partly sunny, with a high near 73. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday Night
 
 Mostly cloudy, with a low around 53. Northwest wind around 5 mph becoming calm in the evening.
Sunday
 
 A 40 percent chance of showers after 10am. Partly sunny, with a high near 73.
Sunday Night
 
 Partly cloudy, with a low around 52.
Monday
 
 A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 73.
Monday Night
 
 Showers likely, mainly after 9pm. Mostly cloudy, with a low around 53. Chance of precipitation is 70%.
Tuesday
 
 Showers likely, mainly before 10am. Mostly cloudy, with a high near 75. Chance of precipitation is 60%.
Tuesday Night
 
 Partly cloudy, with a low around 55.
Wednesday
 
 Mostly sunny, with a high near 78.
Wednesday Night
 
 Partly cloudy, with a low around 54.
Thursday
 
 A 30 percent chance of showers. Mostly sunny, with a high near 73.

 

Forecast from NOAA-NWS for Belfast ME.