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.

Partly Cloudy

73°F

23°C

Humidity 81%
Wind Speed S 12 mph
Barometer 29.81 in (1009.5 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 19 Aug 4:51 pm EDT
Extended Forecast for

South Harpswell ME

  • Tonight

    Tonight: Areas of fog. Otherwise, mostly cloudy, with a low around 64. South wind 5 to 10 mph becoming west after midnight.

    Low: 64 °F

    Areas Fog

  • Thursday

    Thursday: Increasing clouds, with a high near 72. Northwest wind around 5 mph becoming south in the afternoon.

    High: 72 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Cloudy during the early evening, then gradual clearing, with a low around 62. South wind around 5 mph becoming north after midnight.

    Low: 62 °F

    Gradual
    Clearing

  • Friday

    Friday: Sunny, with a high near 72. North wind 5 to 10 mph becoming southeast in the afternoon.

    High: 72 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 61. South wind around 5 mph becoming calm in the evening.

    Low: 61 °F

    Partly Cloudy

  • Saturday

    Saturday: A 40 percent chance of showers after 11am. Mostly cloudy, with a high near 69.

    High: 69 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 62.

    Low: 62 °F

    Chance
    Showers

  • Sunday

    Sunday: A 40 percent chance of showers. Mostly cloudy, with a high near 71.

    High: 71 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A 40 percent chance of showers before 2am. Mostly cloudy, with a low around 63.

    Low: 63 °F

    Chance
    Showers

Detailed Forecast

Tonight
Areas of fog. Otherwise, mostly cloudy, with a low around 64. South wind 5 to 10 mph becoming west after midnight.
Thursday
Increasing clouds, with a high near 72. Northwest wind around 5 mph becoming south in the afternoon.
Thursday Night
Cloudy during the early evening, then gradual clearing, with a low around 62. South wind around 5 mph becoming north after midnight.
Friday
Sunny, with a high near 72. North wind 5 to 10 mph becoming southeast in the afternoon.
Friday Night
Partly cloudy, with a low around 61. South wind around 5 mph becoming calm in the evening.
Saturday
A 40 percent chance of showers after 11am. Mostly cloudy, with a high near 69.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 62.
Sunday
A 40 percent chance of showers. Mostly cloudy, with a high near 71.
Sunday Night
A 40 percent chance of showers before 2am. Mostly cloudy, with a low around 63.
Monday
Mostly sunny, with a high near 73.
Monday Night
Mostly clear, with a low around 61.
Tuesday
Sunny, with a high near 72.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Harpswell ME
 43.74°N 70°W (Elev. 0 ft)
Last Update:
2:20 pm EDT Aug 19, 2026
Forecast Valid:
5pm EDT Aug 19, 2026-6pm EDT Aug 26, 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