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

32°F

0°C

Humidity 56%
Wind Speed W 8 mph
Barometer 29.99 in (1015.5 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 13 Mar 3:56 am EDT
Extended Forecast for

Hadlyme CT

  • Today

    Today: Increasing clouds, with a high near 44. Wind chill values between 25 and 35. Light and variable wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 20 mph.

    High: 44 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A 30 percent chance of rain before 2am. Cloudy during the early evening, then gradual clearing, with a low around 36. South wind 9 to 13 mph, with gusts as high as 24 mph.

    Low: 36 °F

    Chance Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 47. West wind 14 to 18 mph, with gusts as high as 33 mph.

    High: 47 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 29. Northwest wind 6 to 11 mph.

    Low: 29 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, with a high near 44. Light and variable wind becoming southeast 5 to 8 mph in the morning.

    High: 44 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Rain likely, mainly after 5am. Mostly cloudy, with a low around 36. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 36 °F

    Mostly Cloudy
    then Rain
    Likely

  • Monday

    Monday: Rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 58. Breezy. Chance of precipitation is 100%.

    High: 58 °F

    Heavy Rain
    and Breezy

  • Monday Night

    Monday Night: Rain. Low around 40. Windy. Chance of precipitation is 90%.

    Low: 40 °F

    Rain and
    Windy

  • Tuesday

    Tuesday: Rain likely, mainly before 8am. Partly sunny, with a high near 47. Chance of precipitation is 60%.

    High: 47 °F

    Rain Likely
    then Chance
    Rain

Detailed Forecast

Today
Increasing clouds, with a high near 44. Wind chill values between 25 and 35. Light and variable wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 20 mph.
Tonight
A 30 percent chance of rain before 2am. Cloudy during the early evening, then gradual clearing, with a low around 36. South wind 9 to 13 mph, with gusts as high as 24 mph.
Saturday
Mostly sunny, with a high near 47. West wind 14 to 18 mph, with gusts as high as 33 mph.
Saturday Night
Increasing clouds, with a low around 29. Northwest wind 6 to 11 mph.
Sunday
Mostly cloudy, with a high near 44. Light and variable wind becoming southeast 5 to 8 mph in the morning.
Sunday Night
Rain likely, mainly after 5am. Mostly cloudy, with a low around 36. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 58. Breezy. Chance of precipitation is 100%.
Monday Night
Rain. Low around 40. Windy. Chance of precipitation is 90%.
Tuesday
Rain likely, mainly before 8am. Partly sunny, with a high near 47. Chance of precipitation is 60%.
Tuesday Night
Partly cloudy, with a low around 23.
Wednesday
Sunny, with a high near 39.
Wednesday Night
Mostly cloudy, with a low around 26.
Thursday
Mostly cloudy, with a high near 44.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hadlyme CT
 41.4°N 72.34°W (Elev. 299 ft)
Last Update:
3:05 am EDT Mar 13, 2026
Forecast Valid:
4am EDT Mar 13, 2026-6pm EDT Mar 19, 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