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.

Overcast

41°F

5°C

Humidity 57%
Wind Speed SE 7 mph
Barometer 30.11 in (1019.4 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 7 Apr 4:56 am EDT
Extended Forecast for

South Lyme CT

  • Overnight

    Overnight: A chance of rain and snow showers. Cloudy, with a low around 37. Calm wind. Chance of precipitation is 40%.

    Low: 37 °F

    Chance
    Rain/Snow

  • Tuesday

    Tuesday: A chance of rain and snow showers before 8am, then a slight chance of rain showers. Partly sunny, with a high near 52. South wind 5 to 10 mph becoming west 11 to 16 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 30%.

    High: 52 °F

    Chance
    Rain/Snow
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 27. Wind chill values between 15 and 20. North wind 11 to 15 mph.

    Low: 27 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 46. Wind chill values between 15 and 25 early. North wind around 9 mph becoming south in the afternoon.

    High: 46 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 29. South wind around 5 mph becoming calm in the evening.

    Low: 29 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 58.

    High: 58 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Overnight
A chance of rain and snow showers. Cloudy, with a low around 37. Calm wind. Chance of precipitation is 40%.
Tuesday
A chance of rain and snow showers before 8am, then a slight chance of rain showers. Partly sunny, with a high near 52. South wind 5 to 10 mph becoming west 11 to 16 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 30%.
Tuesday Night
Mostly clear, with a low around 27. Wind chill values between 15 and 20. North wind 11 to 15 mph.
Wednesday
Sunny, with a high near 46. Wind chill values between 15 and 25 early. North wind around 9 mph becoming south in the afternoon.
Wednesday Night
Clear, with a low around 29. South wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 50.
Thursday Night
Partly cloudy, with a low around 37.
Friday
Mostly sunny, with a high near 58.
Friday Night
Partly cloudy, with a low around 43.
Saturday
Mostly sunny, with a high near 65.
Saturday Night
Mostly clear, with a low around 41.
Sunday
Sunny, with a high near 58.
Sunday Night
Mostly cloudy, with a low around 44.
Monday
Partly sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Lyme CT
 41.32°N 72.29°W (Elev. 98 ft)
Last Update:
4:36 am EDT Apr 7, 2026
Forecast Valid:
5am EDT Apr 7, 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