National Weather Service Forecast for: Belfast ME
Issued by: National Weather Service Gray/Portland, ME
Updated: 2:38 pm EDT Jun 29, 2026
 
Overnight

Overnight: Mostly clear, with a low around 60. Calm wind becoming west around 5 mph.
Mostly Clear

 Tuesday

Tuesday: Increasing clouds, with a high near 84. Light and variable wind becoming south 5 to 10 mph in the afternoon.
Increasing
Clouds

 Tuesday
Night
Tuesday Night: Showers likely, mainly between 2am and 5am. Mostly cloudy, with a low around 60. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Scattered
Showers then
Showers
Likely
 Wednesday

Wednesday: A 30 percent chance of showers after 2pm. Partly sunny through mid morning, then becoming sunny, with a high near 83. Southwest wind around 5 mph.
Mostly Sunny
then Chance
Showers
 Wednesday
Night
Wednesday Night: A 40 percent chance of showers before 2am. Mostly cloudy, with a low around 66. South wind around 5 mph becoming calm.
Chance
Showers

 Thursday

Thursday: Mostly sunny and hot, with a high near 93.
Hot

 Thursday
Night
Thursday Night: Partly cloudy, with a low around 70.
Partly Cloudy

 Friday

Friday: Mostly sunny and hot, with a high near 92.
Hot

 Friday
Night
Friday Night: Partly cloudy, with a low around 66.
Partly Cloudy
Lo 60 °F Hi 84 °F Lo 60 °F Hi 83 °F Lo 66 °F Hi 93 °F Lo 70 °F Hi 92 °F Lo 66 °F

 

Overnight
 
 Mostly clear, with a low around 60. Calm wind becoming west around 5 mph.
Tuesday
 
 Increasing clouds, with a high near 84. Light and variable wind becoming south 5 to 10 mph in the afternoon.
Tuesday Night
 
 Showers likely, mainly between 2am and 5am. Mostly cloudy, with a low around 60. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
 
 A 30 percent chance of showers after 2pm. Partly sunny through mid morning, then becoming sunny, with a high near 83. Southwest wind around 5 mph.
Wednesday Night
 
 A 40 percent chance of showers before 2am. Mostly cloudy, with a low around 66. South wind around 5 mph becoming calm.
Thursday
 
 Mostly sunny and hot, with a high near 93.
Thursday Night
 
 Partly cloudy, with a low around 70.
Friday
 
 Mostly sunny and hot, with a high near 92.
Friday Night
 
 Partly cloudy, with a low around 66.
Independence Day
 
 A 40 percent chance of showers after 1pm. Partly sunny, with a high near 87.
Saturday Night
 
 A 30 percent chance of showers. Mostly cloudy, with a low around 63.
Sunday
 
 Mostly sunny, with a high near 82.
Sunday Night
 
 Partly cloudy, with a low around 61.
Monday
 
 Mostly sunny, with a high near 80.

 

Forecast from NOAA-NWS for Belfast ME.