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 40%
Wind Speed SW 12 G 21 mph
Barometer 30.12 in (1020.0 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 29 Aug 4:53 pm EDT
Extended Forecast for

Newcastle ME

  • Tonight

    Tonight: Increasing clouds, with a low around 55. Southwest wind around 5 mph becoming calm in the evening.

    Low: 55 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly sunny, with a high near 84. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 84 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers between 7pm and 2am. Mostly cloudy, then gradually becoming mostly clear, with a low around 54. Calm wind. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 54 °F

    Chance
    Showers

  • Monday

    Monday: Sunny, with a high near 82. North wind around 5 mph becoming southwest in the afternoon.

    High: 82 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 54. Calm wind.

    Low: 54 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of showers after 1pm. Partly sunny, with a high near 76.

    High: 76 °F

    Partly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers before 3am. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers after 8am. Mostly cloudy, with a high near 74.

    High: 74 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after 10pm. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.

    Low: 57 °F

    Showers
    Likely

Detailed Forecast

Tonight
Increasing clouds, with a low around 55. Southwest wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 84. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
A chance of showers between 7pm and 2am. Mostly cloudy, then gradually becoming mostly clear, with a low around 54. Calm wind. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Sunny, with a high near 82. North wind around 5 mph becoming southwest in the afternoon.
Monday Night
Partly cloudy, with a low around 54. Calm wind.
Tuesday
A 40 percent chance of showers after 1pm. Partly sunny, with a high near 76.
Tuesday Night
A 40 percent chance of showers before 3am. Mostly cloudy, with a low around 54.
Wednesday
A 30 percent chance of showers after 8am. Mostly cloudy, with a high near 74.
Wednesday Night
Showers likely, mainly after 10pm. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.
Thursday
A 50 percent chance of showers. Mostly cloudy, with a high near 78.
Thursday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 57.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 76.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 55.
Saturday
Mostly sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle ME
 44.03°N 69.53°W (Elev. 0 ft)
Last Update:
2:29 pm EDT Aug 29, 2026
Forecast Valid:
5pm EDT Aug 29, 2026-6pm EDT Sep 5, 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