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

Wiscasset Airport (KIWI)

Lat: 43.96°NLon: 69.71°WElev: 53ft.

Fair

76°F

24°C

Humidity 56%
Wind Speed Vrbl 7 mph
Barometer 30.05 in (1017.7 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 22 Jun 11:53 am EDT
Extended Forecast for

Harpswell ME

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 73. Southeast wind 5 to 10 mph.

    High: 73 °F

    Mostly Cloudy

  • Tonight

    Tonight: Scattered showers before 8pm, then rain between 8pm and 11pm, then rain and possibly a thunderstorm after 11pm. Low around 56. South wind 5 to 10 mph becoming east in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    Low: 56 °F

    Showers

  • Tuesday

    Tuesday: Showers likely before 11am, then rain between 11am and noon, then scattered showers after noon. High near 77. South wind 5 to 10 mph becoming north in the morning. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 77 °F

    Rain then
    Scattered
    Showers

  • Tuesday Night

    Tuesday Night: Patchy fog between 9pm and 11pm. Otherwise, partly cloudy, with a low around 59. Calm wind becoming northwest around 5 mph.

    Low: 59 °F

    Patchy Fog
    then Mostly
    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 77. West wind 5 to 10 mph.

    High: 77 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of showers after midnight. Mostly cloudy, with a low around 58.

    Low: 58 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 77. Chance of precipitation is 70%.

    High: 77 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 73. Southeast wind 5 to 10 mph.
Tonight
Scattered showers before 8pm, then rain between 8pm and 11pm, then rain and possibly a thunderstorm after 11pm. Low around 56. South wind 5 to 10 mph becoming east in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Tuesday
Showers likely before 11am, then rain between 11am and noon, then scattered showers after noon. High near 77. South wind 5 to 10 mph becoming north in the morning. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Patchy fog between 9pm and 11pm. Otherwise, partly cloudy, with a low around 59. Calm wind becoming northwest around 5 mph.
Wednesday
Sunny, with a high near 77. West wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 60.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
A 50 percent chance of showers after midnight. Mostly cloudy, with a low around 58.
Friday
Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 77. Chance of precipitation is 70%.
Friday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 1am. Mostly cloudy, with a low around 60. Chance of precipitation is 50%.
Saturday
Mostly sunny, with a high near 82.
Saturday Night
Partly cloudy, with a low around 62.
Sunday
A 30 percent chance of showers. Mostly sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Harpswell ME
 43.8°N 69.99°W (Elev. 89 ft)
Last Update:
5:30 am EDT Jun 22, 2026
Forecast Valid:
12pm EDT Jun 22, 2026-6pm EDT Jun 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