Current conditions at

Wiscasset Airport (KIWI)

Lat: 43.96°NLon: 69.71°WElev: 53ft.

Partly Cloudy

80°F

27°C

Humidity 56%
Wind Speed SE 8 mph
Barometer 30.09 in (1018.9 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 29 Jun 2:53 pm EDT
Extended Forecast for

Newcastle ME

Extreme Heat Watch July 1, 12:00pm until July 3, 08:00pm
Click here for hazard details and duration
Extreme Heat Watch
  • Tonight

    Tonight: Mostly clear, with a low around 59. South wind around 5 mph becoming calm  in the evening.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 86. Light southwest wind becoming south 5 to 10 mph in the afternoon.

    High: 86 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Scattered showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 3am, then scattered showers and thunderstorms after 3am.  Mostly cloudy, with a low around 62. Southwest wind around 5 mph.  Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Scattered
    Showers then
    Showers
    Likely

  • Wednesday

    Wednesday: Increasing clouds, with a high near 89. Heat index values as high as 100. Southwest wind around 5 mph.

    High: 89 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers before 2am.  Mostly cloudy, with a low around 68. Calm wind.

    Low: 68 °F

    Chance
    Showers

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 99.

    High: 99 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny and hot, with a high near 99.

    High: 99 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 59. South wind around 5 mph becoming calm in the evening.
Tuesday
Partly sunny, with a high near 86. Light southwest wind becoming south 5 to 10 mph in the afternoon.
Tuesday Night
Scattered showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 3am, then scattered showers and thunderstorms after 3am. Mostly cloudy, with a low around 62. Southwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Increasing clouds, with a high near 89. Heat index values as high as 100. Southwest wind around 5 mph.
Wednesday Night
A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 68. Calm wind.
Thursday
Mostly sunny and hot, with a high near 99.
Thursday Night
Partly cloudy, with a low around 72.
Friday
Mostly sunny and hot, with a high near 99.
Friday Night
Mostly clear, with a low around 69.
Independence Day
A 30 percent chance of showers after 1pm. Mostly sunny and hot, with a high near 93.
Saturday Night
Partly cloudy, with a low around 65.
Sunday
Mostly sunny, with a high near 88.
Sunday Night
Partly cloudy, with a low around 62.
Monday
Mostly sunny, with a high near 85.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle ME
 44.03°N 69.53°W (Elev. 0 ft)
2:38 pm EDT Jun 29, 2026
3pm EDT Jun 29, 2026-6pm EDT Jul 6, 2026
 
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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