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

34°F

1°C

Humidity 67%
Wind Speed NW 13 G 22 mph
Barometer 30.16 in (1021.2 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 24 Mar 1:56 am EDT
Extended Forecast for

3 Miles SE South Lyme CT

  • Overnight

    Overnight: Mostly clear, with a low around 32. Wind chill values between 25 and 30. Northwest wind around 11 mph.

    Low: 32 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 44. Wind chill values between 25 and 35. North wind 5 to 10 mph becoming southwest in the afternoon.

    High: 44 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 35. Southwest wind 7 to 9 mph.

    Low: 35 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 46. Light west wind becoming southwest 6 to 11 mph in the morning.

    High: 46 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain after 2am. Cloudy, with a low around 40. South wind around 11 mph.

    Low: 40 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday

    Thursday: Mostly cloudy, with a high near 53.

    High: 53 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Rain likely, mainly after 2am. Mostly cloudy, with a low around 45. Chance of precipitation is 70%.

    Low: 45 °F

    Chance Rain
    then Rain
    Likely

  • Friday

    Friday: Rain likely, mainly before 8am. Partly sunny, with a high near 50. Chance of precipitation is 60%.

    High: 50 °F

    Rain Likely

  • Friday Night

    Friday Night: Partly cloudy, with a low around 26.

    Low: 26 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 32. Wind chill values between 25 and 30. Northwest wind around 11 mph.
Tuesday
Sunny, with a high near 44. Wind chill values between 25 and 35. North wind 5 to 10 mph becoming southwest in the afternoon.
Tuesday Night
Partly cloudy, with a low around 35. Southwest wind 7 to 9 mph.
Wednesday
Partly sunny, with a high near 46. Light west wind becoming southwest 6 to 11 mph in the morning.
Wednesday Night
A 20 percent chance of rain after 2am. Cloudy, with a low around 40. South wind around 11 mph.
Thursday
Mostly cloudy, with a high near 53.
Thursday Night
Rain likely, mainly after 2am. Mostly cloudy, with a low around 45. Chance of precipitation is 70%.
Friday
Rain likely, mainly before 8am. Partly sunny, with a high near 50. Chance of precipitation is 60%.
Friday Night
Partly cloudy, with a low around 26.
Saturday
Sunny, with a high near 40.
Saturday Night
Mostly clear, with a low around 31.
Sunday
Sunny, with a high near 45.
Sunday Night
Partly cloudy, with a low around 36.
Monday
Mostly sunny, with a high near 48.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE South Lyme CT
 41.3°N 72.24°W (Elev. 0 ft)
Last Update:
5:10 pm EDT Mar 23, 2026
Forecast Valid:
2am EDT Mar 24, 2026-6pm EDT Mar 30, 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