National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Portland, Portland International Jetport (KPWM)

Lat: 43.64°NLon: 70.3°WElev: 72ft.

Mostly Cloudy

55°F

13°C

Humidity 59%
Wind Speed S 5 mph
Barometer 30.20 in (1022.7 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill54°F (12°C)
Last update 21 May 7:51 pm EDT
Extended Forecast for

South Portland ME

  • Tonight

    Tonight: Mostly cloudy, then becoming mostly clear toward daybreak, with a low around 41. Calm wind becoming north around 5 mph.

    Low: 41 °F

    Mostly Cloudy

  • Friday

    Friday: Sunny, with a high near 67. North wind around 5 mph becoming south in the afternoon.

    High: 67 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 44. Southwest wind around 5 mph becoming calm in the evening.

    Low: 44 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 65. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 65 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers likely, mainly after 5pm. Cloudy, with a high near 58. Chance of precipitation is 60%.

    High: 58 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers. Low around 45. Chance of precipitation is 90%.

    Low: 45 °F

    Showers

  • Memorial Day

    Memorial Day: Showers likely, mainly before noon. Cloudy, with a high near 62. Chance of precipitation is 70%.

    High: 62 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then becoming mostly clear toward daybreak, with a low around 41. Calm wind becoming north around 5 mph.
Friday
Sunny, with a high near 67. North wind around 5 mph becoming south in the afternoon.
Friday Night
Partly cloudy, with a low around 44. Southwest wind around 5 mph becoming calm in the evening.
Saturday
Mostly cloudy, with a high near 65. Calm wind becoming southeast around 5 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 45. Calm wind.
Sunday
Showers likely, mainly after 5pm. Cloudy, with a high near 58. Chance of precipitation is 60%.
Sunday Night
Showers. Low around 45. Chance of precipitation is 90%.
Memorial Day
Showers likely, mainly before noon. Cloudy, with a high near 62. Chance of precipitation is 70%.
Monday Night
Mostly cloudy, with a low around 48.
Tuesday
Mostly sunny, with a high near 72.
Tuesday Night
Partly cloudy, with a low around 50.
Wednesday
A 30 percent chance of showers. Mostly sunny, with a high near 75.
Wednesday Night
Partly cloudy, with a low around 49.
Thursday
Mostly sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Portland ME
 43.62°N 70.28°W (Elev. 39 ft)
Last Update:
7:08 pm EDT May 21, 2026
Forecast Valid:
8pm EDT May 21, 2026-6pm EDT May 28, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation