National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Groton / New London, Groton / New London Airport (KGON)

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Fair

35°F

2°C

Humidity 78%
Wind Speed NW 3 mph
Barometer 29.91 in (1012.9 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 6 Dec 8:56 pm EST
Extended Forecast for

Hadlyme CT

  • Tonight

    Tonight: Mostly clear, with a low around 25. Calm wind.

    Low: 25 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 41. Calm wind becoming south around 5 mph.

    High: 41 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 21. Calm wind becoming northwest 5 to 7 mph after midnight.

    Low: 21 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 29. Wind chill values between 10 and 15. North wind 10 to 13 mph, with gusts as high as 24 mph.

    High: 29 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 11. North wind around 6 mph becoming calm in the evening.

    Low: 11 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 37.

    High: 37 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of rain after 1pm. Mostly cloudy, with a high near 46.

    High: 46 °F

    Mostly Cloudy
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 31.

    Low: 31 °F

    Chance Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 25. Calm wind.
Sunday
Partly sunny, with a high near 41. Calm wind becoming south around 5 mph.
Sunday Night
Partly cloudy, with a low around 21. Calm wind becoming northwest 5 to 7 mph after midnight.
Monday
Sunny, with a high near 29. Wind chill values between 10 and 15. North wind 10 to 13 mph, with gusts as high as 24 mph.
Monday Night
Partly cloudy, with a low around 11. North wind around 6 mph becoming calm in the evening.
Tuesday
Increasing clouds, with a high near 37.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
A 40 percent chance of rain after 1pm. Mostly cloudy, with a high near 46.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 31.
Thursday
A 30 percent chance of rain before 1pm. Partly sunny, with a high near 42.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 26. Chance of precipitation is 30%.
Friday
A chance of rain and snow. Partly sunny, with a high near 39. Chance of precipitation is 30%.
Friday Night
A 30 percent chance of snow. Partly cloudy, with a low around 21.
Saturday
Mostly sunny, with a high near 33.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hadlyme CT
 41.42°N 72.33°W (Elev. 207 ft)
Last Update:
4:40 pm EST Dec 6, 2025
Forecast Valid:
9pm EST Dec 6, 2025-6pm EST Dec 13, 2025
 
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