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

63°F

17°C

Humidity 78%
Wind Speed Calm
Barometer 30.14 in (1020.7 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 15 Aug 8:53 pm EDT
Extended Forecast for

South Newcastle ME

  • Tonight

    Tonight: Mostly clear, with a low around 50. Calm wind.

    Low: 50 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 76. Light and variable wind becoming south 5 to 10 mph in the afternoon.

    High: 76 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of rain, mainly after 3am. Mostly cloudy, with a low around 60. South wind around 5 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 60 °F

    Mostly Cloudy
    then Chance
    Rain

  • Monday

    Monday: Rain before noon, then showers, mainly after noon. High near 74. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%.

    High: 74 °F

    Rain

  • Monday Night

    Monday Night: Showers likely, mainly before 7pm. Mostly cloudy, with a low around 59. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.

    Low: 59 °F

    Showers
    Likely then
    Chance
    Showers

  • Tuesday

    Tuesday: Partly sunny, with a high near 82.

    High: 82 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 61.

    Low: 61 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 50. Calm wind.
Sunday
Mostly sunny, with a high near 76. Light and variable wind becoming south 5 to 10 mph in the afternoon.
Sunday Night
A 30 percent chance of rain, mainly after 3am. Mostly cloudy, with a low around 60. South wind around 5 mph. New precipitation amounts of less than a tenth of an inch possible.
Monday
Rain before noon, then showers, mainly after noon. High near 74. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%.
Monday Night
Showers likely, mainly before 7pm. Mostly cloudy, with a low around 59. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.
Tuesday
Partly sunny, with a high near 82.
Tuesday Night
Partly cloudy, with a low around 58.
Wednesday
Mostly sunny, with a high near 82.
Wednesday Night
Mostly cloudy, with a low around 61.
Thursday
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 81.
Thursday Night
A 30 percent chance of showers. Partly cloudy, with a low around 54.
Friday
Sunny, with a high near 80.
Friday Night
Partly cloudy, with a low around 54.
Saturday
Mostly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Newcastle ME
 44.01°N 69.6°W (Elev. 16 ft)
Last Update:
6:12 pm EDT Aug 15, 2026
Forecast Valid:
9pm EDT Aug 15, 2026-6pm EDT Aug 22, 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