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

37°F

3°C

Humidity 57%
Wind Speed W 12 mph
Barometer 29.98 in (1015.2 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 7 Dec 10:56 pm EST
Extended Forecast for

Hadlyme CT

  • Tonight

    Tonight: Mostly clear, with a low around 21. West wind 7 to 11 mph.

    Low: 21 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 28. Wind chill values between 10 and 20. North wind 8 to 13 mph, with gusts as high as 30 mph.

    High: 28 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 13. North wind around 5 mph becoming calm after midnight.

    Low: 13 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 39. Wind chill values between 15 and 25. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 39 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A slight chance of rain and snow before 1am, then a slight chance of snow. Mostly cloudy, with a steady temperature around 34. Southwest wind around 9 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

    Low: 34 °F

    Slight Chance
    Rain/Snow

  • Wednesday

    Wednesday: A 50 percent chance of rain. Mostly cloudy, with a high near 47.

    High: 47 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 33.

    Low: 33 °F

    Chance Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 21. West wind 7 to 11 mph.
Monday
Mostly sunny, with a high near 28. Wind chill values between 10 and 20. North wind 8 to 13 mph, with gusts as high as 30 mph.
Monday Night
Partly cloudy, with a low around 13. North wind around 5 mph becoming calm after midnight.
Tuesday
Increasing clouds, with a high near 39. Wind chill values between 15 and 25. Calm wind becoming south 5 to 7 mph in the afternoon.
Tuesday Night
A slight chance of rain and snow before 1am, then a slight chance of snow. Mostly cloudy, with a steady temperature around 34. Southwest wind around 9 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Wednesday
A 50 percent chance of rain. Mostly cloudy, with a high near 47.
Wednesday Night
A 30 percent chance of rain before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 33.
Thursday
Mostly sunny, with a high near 41.
Thursday Night
Mostly cloudy, with a low around 25.
Friday
A 30 percent chance of snow. Partly sunny, with a high near 37.
Friday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 21.
Saturday
A 30 percent chance of snow. Partly sunny, with a high near 34.
Saturday Night
Partly cloudy, with a low around 18.
Sunday
Mostly sunny, with a high near 31.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hadlyme CT
 41.4°N 72.34°W (Elev. 299 ft)
Last Update:
5:39 pm EST Dec 7, 2025
Forecast Valid:
11pm EST Dec 7, 2025-6pm EST Dec 14, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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