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.

A Few Clouds

50°F

10°C

Humidity 52%
Wind Speed SW 3 mph
Barometer 29.96 in (1014.4 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 10 Mar 8:51 am EDT
Extended Forecast for

South Harpswell ME

  • Today

    Today: Sunny, with a high near 49. South wind 5 to 10 mph.

    High: 49 °F

    Sunny

  • Tonight

    Tonight: A 20 percent chance of rain after 3am. Mostly cloudy, with a low around 35. Light and variable wind becoming northeast 5 to 10 mph after midnight.

    Low: 35 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: Rain likely, mainly after 9am. Patchy fog before 2pm, then patchy fog after 3pm. Otherwise, cloudy, with a high near 40. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 40 °F

    Rain Likely
    and Patchy
    Fog

  • Wednesday Night

    Wednesday Night: Rain likely. Areas of dense fog. Otherwise, cloudy, with a low around 37. Breezy, with an east wind 5 to 10 mph becoming south 15 to 20 mph after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.

    Low: 37 °F

    Rain Likely
    and Areas
    Dense Fog

  • Thursday

    Thursday: Rain likely, mainly before 10am. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 46. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

    High: 46 °F

    Rain Likely
    and Patchy
    Fog

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 28. Blustery.

    Low: 28 °F

    Partly Cloudy
    and Blustery

  • Friday

    Friday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of snow before 11pm, then rain and snow likely between 11pm and 2am, then rain likely after 2am. Mostly cloudy, with a low around 33. Breezy. Chance of precipitation is 60%.

    Low: 33 °F

    Rain/Snow
    Likely and
    Breezy

  • Saturday

    Saturday: A 40 percent chance of rain before 11am. Mostly sunny, with a high near 41. Breezy.

    High: 41 °F

    Breezy.
    Chance Rain
    then Mostly
    Sunny

Detailed Forecast

Today
Sunny, with a high near 49. South wind 5 to 10 mph.
Tonight
A 20 percent chance of rain after 3am. Mostly cloudy, with a low around 35. Light and variable wind becoming northeast 5 to 10 mph after midnight.
Wednesday
Rain likely, mainly after 9am. Patchy fog before 2pm, then patchy fog after 3pm. Otherwise, cloudy, with a high near 40. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain likely. Areas of dense fog. Otherwise, cloudy, with a low around 37. Breezy, with an east wind 5 to 10 mph becoming south 15 to 20 mph after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.
Thursday
Rain likely, mainly before 10am. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 46. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Thursday Night
Partly cloudy, with a low around 28. Blustery.
Friday
Mostly sunny, with a high near 39.
Friday Night
A chance of snow before 11pm, then rain and snow likely between 11pm and 2am, then rain likely after 2am. Mostly cloudy, with a low around 33. Breezy. Chance of precipitation is 60%.
Saturday
A 40 percent chance of rain before 11am. Mostly sunny, with a high near 41. Breezy.
Saturday Night
Mostly cloudy, with a low around 29.
Sunday
A 30 percent chance of snow. Cloudy, with a high near 41.
Sunday Night
Rain likely. Cloudy, with a low around 35. Windy. Chance of precipitation is 60%.
Monday
Rain likely. Cloudy, with a high near 46. Windy. Chance of precipitation is 70%.
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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:
6:45 am EDT Mar 10, 2026
Forecast Valid:
9am EDT Mar 10, 2026-6pm EDT Mar 16, 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