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.

Overcast

35°F

2°C

Humidity 64%
Wind Speed N 7 mph
Barometer 29.93 in (1013.4 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 19 Feb 1:56 am EST
Extended Forecast for

Hadlyme CT

  • Overnight

    Overnight: Areas of fog before 4am. Otherwise, cloudy, with a low around 29. Light northeast wind.

    Low: 29 °F

    Areas Fog

  • Thursday

    Thursday: Mostly cloudy, with a high near 40. Light and variable wind becoming northeast around 5 mph in the morning.

    High: 40 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 20 percent chance of snow after 4am. Mostly cloudy, with a low around 29. Light east wind.

    Low: 29 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Friday

    Friday: Rain likely, possibly mixed with snow before 1pm, then rain. High near 38. Wind chill values between 25 and 30. East wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    High: 38 °F

    Rain/Snow
    Likely then
    Rain/Snow

  • Friday Night

    Friday Night: Rain likely, possibly mixed with snow before 4am, then a chance of snow. Cloudy, with a low around 30. Northeast wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 30 °F

    Rain/Snow
    Likely

  • Saturday

    Saturday: A 30 percent chance of snow after 1pm. Mostly cloudy, with a high near 39.

    High: 39 °F

    Mostly Cloudy
    then Chance
    Snow

  • Saturday Night

    Saturday Night: A 30 percent chance of snow before 1am. Mostly cloudy, with a low around 23.

    Low: 23 °F

    Chance Snow

  • Sunday

    Sunday: A 30 percent chance of snow after 1pm. Partly sunny, with a high near 37.

    High: 37 °F

    Partly Sunny
    then Chance
    Snow

  • Sunday Night

    Sunday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 26.

    Low: 26 °F

    Chance Snow

Detailed Forecast

Overnight
Areas of fog before 4am. Otherwise, cloudy, with a low around 29. Light northeast wind.
Thursday
Mostly cloudy, with a high near 40. Light and variable wind becoming northeast around 5 mph in the morning.
Thursday Night
A 20 percent chance of snow after 4am. Mostly cloudy, with a low around 29. Light east wind.
Friday
Rain likely, possibly mixed with snow before 1pm, then rain. High near 38. Wind chill values between 25 and 30. East wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Friday Night
Rain likely, possibly mixed with snow before 4am, then a chance of snow. Cloudy, with a low around 30. Northeast wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Saturday
A 30 percent chance of snow after 1pm. Mostly cloudy, with a high near 39.
Saturday Night
A 30 percent chance of snow before 1am. Mostly cloudy, with a low around 23.
Sunday
A 30 percent chance of snow after 1pm. Partly sunny, with a high near 37.
Sunday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 26.
Monday
A 40 percent chance of snow. Mostly cloudy, with a high near 35.
Monday Night
Mostly cloudy, with a low around 22.
Tuesday
Sunny, with a high near 35.
Tuesday Night
Mostly clear, with a low around 17.
Wednesday
Partly sunny, with a high near 37.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hadlyme CT
 41.42°N 72.33°W (Elev. 207 ft)
Last Update:
1:10 am EST Feb 19, 2026
Forecast Valid:
2am EST Feb 19, 2026-6pm EST Feb 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation