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

50°F

10°C

Humidity 30%
Wind Speed W 15 G 26 mph
Barometer 29.98 in (1015.2 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 6 Apr 5:56 pm EDT
Extended Forecast for

3 Miles SE South Lyme CT

  • Tonight

    Tonight: A 30 percent chance of showers, mainly after 4am. Increasing clouds, with a low around 38. West wind 5 to 14 mph becoming northeast after midnight. Winds could gust as high as 25 mph.

    Low: 38 °F

    Partly Cloudy
    then Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers before 8am, then a slight chance of showers after noon. Partly sunny, with a high near 48. East wind 6 to 14 mph becoming west in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 30%.

    High: 48 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 29. Wind chill values between 20 and 25. Northwest wind 10 to 13 mph.

    Low: 29 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 44. Wind chill values between 25 and 35. North wind 5 to 7 mph becoming southeast in the afternoon.

    High: 44 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 34. South wind around 5 mph becoming calm in the evening.

    Low: 34 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 47.

    High: 47 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 30 percent chance of showers, mainly after 4am. Increasing clouds, with a low around 38. West wind 5 to 14 mph becoming northeast after midnight. Winds could gust as high as 25 mph.
Tuesday
A chance of showers before 8am, then a slight chance of showers after noon. Partly sunny, with a high near 48. East wind 6 to 14 mph becoming west in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 30%.
Tuesday Night
Mostly clear, with a low around 29. Wind chill values between 20 and 25. Northwest wind 10 to 13 mph.
Wednesday
Sunny, with a high near 44. Wind chill values between 25 and 35. North wind 5 to 7 mph becoming southeast in the afternoon.
Wednesday Night
Clear, with a low around 34. South wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 47.
Thursday Night
Partly cloudy, with a low around 40.
Friday
Mostly sunny, with a high near 57.
Friday Night
Partly cloudy, with a low around 47.
Saturday
Mostly sunny, with a high near 60.
Saturday Night
Partly cloudy, with a low around 45.
Sunday
Mostly sunny, with a high near 55.
Sunday Night
Mostly cloudy, with a low around 46.
Monday
Partly sunny, with a high near 61.
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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:
5:30 pm EDT Apr 6, 2026
Forecast Valid:
6pm EDT Apr 6, 2026-6pm EDT Apr 13, 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