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 52%
Wind Speed NW 13 G 25 mph
Barometer 29.92 in (1013.1 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 12 Mar 11:56 pm EDT
Extended Forecast for

3 Miles SE South Lyme CT

  • Overnight

    Overnight: Mostly clear, with a low around 30. Wind chill values between 20 and 25. West wind around 14 mph.

    Low: 30 °F

    Mostly Clear

  • Friday

    Friday: Increasing clouds, with a high near 43. Wind chill values between 20 and 30. West wind 6 to 14 mph becoming south in the afternoon.

    High: 43 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: A 20 percent chance of rain before 2am. Mostly cloudy, then gradually becoming mostly clear, with a steady temperature around 41. South wind 16 to 18 mph, with gusts as high as 29 mph.

    Low: 41 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: Sunny, with a high near 47. Breezy, with a west wind 20 to 22 mph, with gusts as high as 32 mph.

    High: 47 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 32. West wind 5 to 11 mph, with gusts as high as 21 mph.

    Low: 32 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, with a high near 45.

    High: 45 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Rain likely after 2am. Cloudy, with a low around 39. Chance of precipitation is 70%.

    Low: 39 °F

    Cloudy then
    Rain Likely

  • Monday

    Monday: Rain and possibly a thunderstorm. High near 55. Breezy. Chance of precipitation is 100%.

    High: 55 °F

    Rain and
    Breezy

  • Monday Night

    Monday Night: Rain, mainly before 2am. Low around 38. Breezy. Chance of precipitation is 90%.

    Low: 38 °F

    Rain and
    Breezy

Detailed Forecast

Overnight
Mostly clear, with a low around 30. Wind chill values between 20 and 25. West wind around 14 mph.
Friday
Increasing clouds, with a high near 43. Wind chill values between 20 and 30. West wind 6 to 14 mph becoming south in the afternoon.
Friday Night
A 20 percent chance of rain before 2am. Mostly cloudy, then gradually becoming mostly clear, with a steady temperature around 41. South wind 16 to 18 mph, with gusts as high as 29 mph.
Saturday
Sunny, with a high near 47. Breezy, with a west wind 20 to 22 mph, with gusts as high as 32 mph.
Saturday Night
Increasing clouds, with a low around 32. West wind 5 to 11 mph, with gusts as high as 21 mph.
Sunday
Mostly cloudy, with a high near 45.
Sunday Night
Rain likely after 2am. Cloudy, with a low around 39. Chance of precipitation is 70%.
Monday
Rain and possibly a thunderstorm. High near 55. Breezy. Chance of precipitation is 100%.
Monday Night
Rain, mainly before 2am. Low around 38. Breezy. Chance of precipitation is 90%.
Tuesday
A 30 percent chance of rain before 8am. Partly sunny, with a high near 44.
Tuesday Night
Partly cloudy, with a low around 26.
Wednesday
Sunny, with a high near 37.
Wednesday Night
Partly cloudy, with a low around 28.
Thursday
Mostly sunny, with a high near 40.
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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:
6:03 pm EDT Mar 12, 2026
Forecast Valid:
12am EDT Mar 13, 2026-6pm EDT Mar 19, 2026
 
Forecast Discussion
 
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Additional Resources

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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