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

43°F

6°C

Humidity 93%
Wind Speed E 5 mph
Barometer 29.40 in (995.5 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 15 Jan 1:56 am EST
Extended Forecast for

2 Miles SSE South Lyme CT

  • Overnight

    Overnight: A 30 percent chance of showers, mainly before 3am. Cloudy, with a steady temperature around 42. Light south wind.

    Low: 42 °F

    Chance
    Showers

  • Thursday

    Thursday: Mostly cloudy, with a temperature rising to near 42 by 9am, then falling to around 36 during the remainder of the day. Southwest wind 6 to 16 mph.

    High: 42 °F⇓

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 22. Wind chill values between 10 and 20. West wind 14 to 17 mph, with gusts as high as 30 mph.

    Low: 22 °F

    Mostly Cloudy

  • Friday

    Friday: Sunny, with a high near 35. Wind chill values between 5 and 15. West wind 11 to 18 mph, with gusts as high as 31 mph.

    High: 35 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 30. Southwest wind 6 to 8 mph.

    Low: 30 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday

    Saturday: A chance of snow before 10am, then a chance of rain. Mostly cloudy, with a high near 42. Chance of precipitation is 50%.

    High: 42 °F

    Chance
    Rain/Snow
    then Chance
    Rain

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 40 percent chance of snow. Mostly cloudy, with a high near 38.

    High: 38 °F

    Chance Snow

  • Sunday Night

    Sunday Night: A 30 percent chance of snow before 1am. Mostly cloudy, with a low around 22.

    Low: 22 °F

    Chance Snow

Detailed Forecast

Overnight
A 30 percent chance of showers, mainly before 3am. Cloudy, with a steady temperature around 42. Light south wind.
Thursday
Mostly cloudy, with a temperature rising to near 42 by 9am, then falling to around 36 during the remainder of the day. Southwest wind 6 to 16 mph.
Thursday Night
Mostly cloudy, with a low around 22. Wind chill values between 10 and 20. West wind 14 to 17 mph, with gusts as high as 30 mph.
Friday
Sunny, with a high near 35. Wind chill values between 5 and 15. West wind 11 to 18 mph, with gusts as high as 31 mph.
Friday Night
A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 30. Southwest wind 6 to 8 mph.
Saturday
A chance of snow before 10am, then a chance of rain. Mostly cloudy, with a high near 42. Chance of precipitation is 50%.
Saturday Night
Mostly cloudy, with a low around 30.
Sunday
A 40 percent chance of snow. Mostly cloudy, with a high near 38.
Sunday Night
A 30 percent chance of snow before 1am. Mostly cloudy, with a low around 22.
M.L.King Day
Mostly sunny, with a high near 32.
Monday Night
Partly cloudy, with a low around 18.
Tuesday
Mostly sunny, with a high near 26.
Tuesday Night
Partly cloudy, with a low around 13.
Wednesday
Mostly sunny, with a high near 28.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE South Lyme CT
 41.28°N 72.3°W (Elev. 0 ft)
Last Update:
2:03 am EST Jan 15, 2026
Forecast Valid:
2am EST Jan 15, 2026-6pm EST Jan 21, 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