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.

Overcast

67°F

19°C

Humidity 87%
Wind Speed Calm
Barometer 30.03 in (1016.9 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 22 Aug 8:53 pm EDT
Extended Forecast for

South Newcastle ME

  • Tonight

    Tonight: A 40 percent chance of showers. Patchy fog. Otherwise, mostly cloudy, with a low around 58. Northeast wind around 5 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.

    Low: 58 °F

    Chance
    Showers and
    Patchy Fog

  • Sunday

    Sunday: A 30 percent chance of showers, mainly before 4pm. Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 75. Calm wind becoming southeast around 5 mph in the afternoon. New precipitation amounts between a quarter and half of an inch possible.

    High: 75 °F

    Chance
    Showers and
    Patchy Fog

  • Sunday Night

    Sunday Night: A 30 percent chance of showers, mainly between 10pm and 3am. Mostly cloudy, with a low around 63. Calm wind. New precipitation amounts of less than a tenth of an inch possible.

    Low: 63 °F

    Chance
    Showers

  • Monday

    Monday: Cloudy through mid morning, then gradual clearing, with a high near 79. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 79 °F

    Gradual
    Clearing

  • Monday Night

    Monday Night: Mostly clear, with a low around 57. South wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

Detailed Forecast

Tonight
A 40 percent chance of showers. Patchy fog. Otherwise, mostly cloudy, with a low around 58. Northeast wind around 5 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.
Sunday
A 30 percent chance of showers, mainly before 4pm. Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 75. Calm wind becoming southeast around 5 mph in the afternoon. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
A 30 percent chance of showers, mainly between 10pm and 3am. Mostly cloudy, with a low around 63. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Monday
Cloudy through mid morning, then gradual clearing, with a high near 79. South wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 57. South wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 78.
Tuesday Night
Mostly clear, with a low around 55.
Wednesday
Sunny, with a high near 82.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
Sunny, with a high near 82.
Thursday Night
Mostly cloudy, with a low around 60.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 79.
Friday Night
Mostly cloudy, with a low around 60.
Saturday
Mostly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Newcastle ME
 43.99°N 69.6°W (Elev. 62 ft)
Last Update:
6:59 pm EDT Aug 22, 2026
Forecast Valid:
9pm EDT Aug 22, 2026-6pm EDT Aug 29, 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