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

Hazardous Weather Conditions

Current conditions at

Portland, Portland International Jetport (KPWM)

Lat: 43.64°NLon: 70.3°WElev: 72ft.

Overcast

41°F

5°C

Humidity 67%
Wind Speed E 3 mph
Barometer 30.17 in (1021.5 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 10 Jan 3:51 pm EST
Extended Forecast for

South Harpswell ME

Winter Weather Advisory January 11, 12:00am until January 11, 07:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • Tonight

    Tonight: Rain and snow, possibly mixed with sleet before 2am, then rain, possibly mixed with snow between 2am and 3am, then rain after 3am. Low around 35. Breezy, with an east wind 5 to 10 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 100%. Little or no snow and sleet accumulation expected.

    Low: 35 °F

    Rain/Snow
    Likely then
    Wintry Mix
    and Breezy

  • Sunday

    Sunday: Rain likely before 3pm, then a chance of rain and snow. Cloudy, with a high near 37. Northeast wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 37 °F

    Rain Likely
    then Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: A chance of snow before 8pm, then a chance of snow showers between 8pm and 1am. Cloudy, then gradually becoming partly cloudy, with a low around 27. Breezy, with a west wind 15 to 20 mph increasing to 20 to 25 mph after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 30%.

    Low: 27 °F

    Chance Snow
    and Breezy

  • Monday

    Monday: Mostly sunny, with a high near 34. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 34 °F

    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 31. West wind around 15 mph, with gusts as high as 25 mph.

    Low: 31 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Cloudy, with a low around 37. Breezy.

    Low: 37 °F

    Cloudy and
    Breezy

  • Wednesday

    Wednesday: Cloudy, with a high near 43. Breezy.

    High: 43 °F

    Cloudy and
    Breezy then
    Cloudy

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain after 7pm. Cloudy, with a low around 29.

    Low: 29 °F

    Chance Rain

Detailed Forecast

Tonight
Rain and snow, possibly mixed with sleet before 2am, then rain, possibly mixed with snow between 2am and 3am, then rain after 3am. Low around 35. Breezy, with an east wind 5 to 10 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 100%. Little or no snow and sleet accumulation expected.
Sunday
Rain likely before 3pm, then a chance of rain and snow. Cloudy, with a high near 37. Northeast wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Sunday Night
A chance of snow before 8pm, then a chance of snow showers between 8pm and 1am. Cloudy, then gradually becoming partly cloudy, with a low around 27. Breezy, with a west wind 15 to 20 mph increasing to 20 to 25 mph after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 34. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Monday Night
Mostly cloudy, with a low around 31. West wind around 15 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 40.
Tuesday Night
Cloudy, with a low around 37. Breezy.
Wednesday
Cloudy, with a high near 43. Breezy.
Wednesday Night
A 40 percent chance of rain after 7pm. Cloudy, with a low around 29.
Thursday
A 30 percent chance of snow before 7am. Mostly cloudy, with a high near 33.
Thursday Night
Mostly cloudy, with a low around 18.
Friday
Partly sunny, with a high near 28.
Friday Night
Mostly cloudy, with a low around 22.
Saturday
Partly sunny, with a high near 34.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Harpswell ME
 43.74°N 70°W (Elev. 0 ft)
Last Update:
1:51 pm EST Jan 10, 2026
Forecast Valid:
4pm EST Jan 10, 2026-6pm EST Jan 17, 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