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.

Light Rain Fog/Mist

43°F

6°C

Humidity 97%
Wind Speed SE 8 mph
Barometer 29.72 in (1006.4 mb)
Dewpoint 42°F (6°C)
Visibility 1.00 mi
Wind Chill38°F (3°C)
Last update 22 Mar 3:56 pm EDT
Extended Forecast for

3 Miles SE South Lyme CT

  • This Afternoon

    This Afternoon: Rain likely, mainly after 5pm. Mostly cloudy, with a high near 49. Southwest wind around 9 mph. Chance of precipitation is 60%.

    High: 49 °F

    Rain Likely

  • Tonight

    Tonight: Rain. Low around 38. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 38 °F

    Rain

  • Monday

    Monday: Rain, mainly before 11am. High near 43. North wind around 11 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 43 °F

    Rain then
    Slight Chance
    Rain

  • Monday Night

    Monday Night: Partly cloudy, with a low around 32. Wind chill values between 25 and 30. Northwest wind around 10 mph.

    Low: 32 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 44. North wind 6 to 9 mph becoming southwest in the afternoon.

    High: 44 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 47.

    High: 47 °F

    Partly Sunny

  • Wednesday Night

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

    Low: 39 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 49.

    High: 49 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Rain likely, mainly after 5pm. Mostly cloudy, with a high near 49. Southwest wind around 9 mph. Chance of precipitation is 60%.
Tonight
Rain. Low around 38. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Monday
Rain, mainly before 11am. High near 43. North wind around 11 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Monday Night
Partly cloudy, with a low around 32. Wind chill values between 25 and 30. Northwest wind around 10 mph.
Tuesday
Sunny, with a high near 44. North wind 6 to 9 mph becoming southwest in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
Partly sunny, with a high near 47.
Wednesday Night
Mostly cloudy, with a low around 39.
Thursday
Partly sunny, with a high near 49.
Thursday Night
Rain likely, mainly after 2am. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Friday
Rain likely. 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 39.
Saturday Night
Mostly clear, with a low around 30.
Sunday
Mostly sunny, with a high near 45.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE South Lyme CT
 41.3°N 72.24°W (Elev. 0 ft)
Last Update:
3:49 pm EDT Mar 22, 2026
Forecast Valid:
4pm EDT Mar 22, 2026-6pm EDT Mar 29, 2026
 
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