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

50°F

10°C

Humidity 86%
Wind Speed SW 13 mph
Barometer 29.63 in (1003.2 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 27 Mar 1:56 am EDT
Extended Forecast for

South Lyme CT

  • Overnight

    Overnight: Showers, mainly before 5am. Steady temperature around 50. West wind 11 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Showers

  • Friday

    Friday: A 30 percent chance of showers before 11am. Mostly cloudy, with a steady temperature around 48. North wind 9 to 11 mph.

    High: 48 °F

    Chance
    Showers then
    Mostly Cloudy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 29. Northeast wind around 6 mph.

    Low: 29 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 41. Wind chill values between 20 and 30. North wind 6 to 10 mph, with gusts as high as 20 mph.

    High: 41 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 26. Light northwest wind.

    Low: 26 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 46.

    High: 46 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Showers, mainly before 5am. Steady temperature around 50. West wind 11 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday
A 30 percent chance of showers before 11am. Mostly cloudy, with a steady temperature around 48. North wind 9 to 11 mph.
Friday Night
Partly cloudy, with a low around 29. Northeast wind around 6 mph.
Saturday
Partly sunny, with a high near 41. Wind chill values between 20 and 30. North wind 6 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 26. Light northwest wind.
Sunday
Mostly sunny, with a high near 46.
Sunday Night
Mostly cloudy, with a low around 38.
Monday
Mostly sunny, with a high near 56.
Monday Night
Mostly cloudy, with a low around 41.
Tuesday
A 30 percent chance of rain after 8am. Partly sunny, with a high near 56.
Tuesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 43.
Wednesday
A 40 percent chance of rain. Partly sunny, with a high near 60.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 46.
Thursday
A 30 percent chance of rain. Mostly cloudy, with a high near 60.
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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:
2:20 am EDT Mar 27, 2026
Forecast Valid:
2am EDT Mar 27, 2026-6pm EDT Apr 2, 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