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

29°F

-2°C

Humidity 66%
Wind Speed S 9 mph
Barometer 30.38 in (1028.6 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 19 Mar 1:56 am EDT
Extended Forecast for

3 Miles SE South Lyme CT

  • Overnight

    Overnight: Mostly clear, with a low around 29. Calm wind.

    Low: 29 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 41. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 41 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 33. Southwest wind 3 to 5 mph.

    Low: 33 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 46. Light and variable wind becoming south 5 to 10 mph in the afternoon.

    High: 46 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Rain likely. Mostly cloudy, with a low around 41. Southwest wind 11 to 13 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 41 °F

    Rain Likely

  • Saturday

    Saturday: Partly sunny, with a high near 52.

    High: 52 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 30 percent chance of rain after 2pm. Mostly cloudy, with a high near 50.

    High: 50 °F

    Mostly Cloudy
    then Chance
    Rain

  • Sunday Night

    Sunday Night: Rain likely, mainly after 2am. Mostly cloudy, with a low around 37. Chance of precipitation is 60%.

    Low: 37 °F

    Rain Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 29. Calm wind.
Thursday
Mostly sunny, with a high near 41. Calm wind becoming south 5 to 7 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 33. Southwest wind 3 to 5 mph.
Friday
Mostly sunny, with a high near 46. Light and variable wind becoming south 5 to 10 mph in the afternoon.
Friday Night
Rain likely. Mostly cloudy, with a low around 41. Southwest wind 11 to 13 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Partly sunny, with a high near 52.
Saturday Night
Mostly cloudy, with a low around 39.
Sunday
A 30 percent chance of rain after 2pm. Mostly cloudy, with a high near 50.
Sunday Night
Rain likely, mainly after 2am. Mostly cloudy, with a low around 37. Chance of precipitation is 60%.
Monday
Rain likely, mainly before 8am. Mostly cloudy, with a high near 44. Chance of precipitation is 60%.
Monday Night
Partly cloudy, with a low around 27.
Tuesday
Mostly sunny, with a high near 42.
Tuesday Night
Partly cloudy, with a low around 32.
Wednesday
Mostly sunny, with a high near 45.
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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:
2:26 am EDT Mar 19, 2026
Forecast Valid:
2am EDT Mar 19, 2026-6pm EDT Mar 25, 2026
 
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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