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

61°F

16°C

Humidity 90%
Wind Speed Calm
Barometer 29.91 in (1012.9 mb)
Dewpoint 58°F (14°C)
Visibility 7.00 mi
Last update 20 Aug 3:53 am EDT
Extended Forecast for

Mouse Island ME

  • Today

    Today: Patchy fog between 11am and 2pm. Otherwise, increasing clouds, with a high near 75. Calm wind becoming south around 5 mph in the afternoon.

    High: 75 °F

    Areas Fog

  • Tonight

    Tonight: A slight chance of showers between 10pm and 11pm. Cloudy, then gradual clearing toward daybreak, with a low around 58. Calm wind. Chance of precipitation is 20%.

    Low: 58 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Friday

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

    High: 72 °F

    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 57. Calm wind.

    Low: 57 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Showers likely, mainly after 3pm. Mostly cloudy, with a high near 71. East wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 71 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers, mainly before 2am. Low around 60. Chance of precipitation is 80%.

    Low: 60 °F

    Showers

  • Sunday

    Sunday: A 50 percent chance of showers. Mostly cloudy, with a high near 74.

    High: 74 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 63.

    Low: 63 °F

    Chance
    Showers

  • Monday

    Monday: Partly sunny, with a high near 77.

    High: 77 °F

    Partly Sunny

Detailed Forecast

Today
Patchy fog between 11am and 2pm. Otherwise, increasing clouds, with a high near 75. Calm wind becoming south around 5 mph in the afternoon.
Tonight
A slight chance of showers between 10pm and 11pm. Cloudy, then gradual clearing toward daybreak, with a low around 58. Calm wind. Chance of precipitation is 20%.
Friday
Sunny, with a high near 72. North wind around 5 mph becoming southeast in the afternoon.
Friday Night
Increasing clouds, with a low around 57. Calm wind.
Saturday
Showers likely, mainly after 3pm. Mostly cloudy, with a high near 71. East wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Saturday Night
Showers, mainly before 2am. Low around 60. Chance of precipitation is 80%.
Sunday
A 50 percent chance of showers. Mostly cloudy, with a high near 74.
Sunday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 63.
Monday
Partly sunny, with a high near 77.
Monday Night
Mostly clear, with a low around 59.
Tuesday
Sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 58.
Wednesday
Sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mouse Island ME
 43.82°N 69.65°W (Elev. 0 ft)
Last Update:
2:25 am EDT Aug 20, 2026
Forecast Valid:
4am EDT Aug 20, 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