National Weather Service Forecast for: Portland ME
Issued by: National Weather Service Gray/Portland, ME
Updated: 7:05 pm EDT Sep 12, 2026
 
Overnight

Overnight: Mostly cloudy, with a low around 58. South wind around 5 mph.
Mostly Cloudy

 Sunday

Sunday: Showers, mainly before 5pm. Patchy fog after 11am. High near 64. Southeast wind 5 to 10 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Showers and
Patchy Fog

 Sunday
Night
Sunday Night: A slight chance of showers before 7pm, then a chance of showers after 4am. Patchy fog before 3am. Otherwise, mostly cloudy, with a low around 61. South wind around 5 mph becoming calm. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Patchy Fog
then Chance
Showers and
Patchy Fog
 Monday

Monday: A 30 percent chance of showers before 7am. Cloudy through mid morning, then gradual clearing, with a high near 67. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.
Chance
Showers then
Sunny
 Monday
Night
Monday Night: Clear, with a low around 49. North wind 5 to 10 mph.
Clear

 Tuesday

Tuesday: Sunny, with a high near 62.
Sunny

 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 53.
Mostly Clear

 Wednesday

Wednesday: Mostly sunny, with a high near 70.
Mostly Sunny

 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 58.
Partly Cloudy
Lo 58 °F Hi 64 °F Lo 61 °F Hi 67 °F Lo 49 °F Hi 62 °F Lo 53 °F Hi 70 °F Lo 58 °F

 

Overnight
 
 Mostly cloudy, with a low around 58. South wind around 5 mph.
Sunday
 
 Showers, mainly before 5pm. Patchy fog after 11am. High near 64. Southeast wind 5 to 10 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
 
 A slight chance of showers before 7pm, then a chance of showers after 4am. Patchy fog before 3am. Otherwise, mostly cloudy, with a low around 61. South wind around 5 mph becoming calm. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Monday
 
 A 30 percent chance of showers before 7am. Cloudy through mid morning, then gradual clearing, with a high near 67. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.
Monday Night
 
 Clear, with a low around 49. North wind 5 to 10 mph.
Tuesday
 
 Sunny, with a high near 62.
Tuesday Night
 
 Mostly clear, with a low around 53.
Wednesday
 
 Mostly sunny, with a high near 70.
Wednesday Night
 
 Partly cloudy, with a low around 58.
Thursday
 
 Partly sunny, with a high near 70.
Thursday Night
 
 A 40 percent chance of showers. Mostly cloudy, with a low around 59.
Friday
 
 Partly sunny, with a high near 72.
Friday Night
 
 Partly cloudy, with a low around 54.
Saturday
 
 Mostly sunny, with a high near 67.

 

Forecast from NOAA-NWS for Portland ME.