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

25°F

-4°C

Humidity 92%
Wind Speed Calm
Barometer 30.03 in (1016.9 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 23 Nov 6:56 am EST
Extended Forecast for

3 Miles SSE South Lyme CT

  • Today

    Today: Mostly sunny, with a high near 48. Light and variable wind becoming southwest 5 to 10 mph in the morning.

    High: 48 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 39. West wind 10 to 14 mph.

    Low: 39 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 49. Northwest wind 9 to 15 mph, with gusts as high as 25 mph.

    High: 49 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 39. Light and variable wind becoming southwest around 6 mph after midnight.

    Low: 39 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of rain after 1pm. Cloudy, with a high near 55. Southwest wind 6 to 10 mph.

    High: 55 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: Rain. Low around 50. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 50 °F

    Rain

  • Wednesday

    Wednesday: A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 58.

    High: 58 °F

    Cloudy then
    Chance Rain

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Chance Rain

  • Thanksgiving Day

    Thanksgiving Day: Mostly sunny, with a high near 48. Breezy.

    High: 48 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

Detailed Forecast

Today
Mostly sunny, with a high near 48. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Tonight
Partly cloudy, with a low around 39. West wind 10 to 14 mph.
Monday
Sunny, with a high near 49. Northwest wind 9 to 15 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 39. Light and variable wind becoming southwest around 6 mph after midnight.
Tuesday
A 30 percent chance of rain after 1pm. Cloudy, with a high near 55. Southwest wind 6 to 10 mph.
Tuesday Night
Rain. Low around 50. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 58.
Wednesday Night
A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 42.
Thanksgiving Day
Mostly sunny, with a high near 48. Breezy.
Thursday Night
Partly cloudy, with a low around 34. Breezy.
Friday
Mostly sunny, with a high near 43. Breezy.
Friday Night
Mostly clear, with a low around 32.
Saturday
Sunny, with a high near 43.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE South Lyme CT
 41.28°N 72.27°W (Elev. 0 ft)
Last Update:
4:14 am EST Nov 23, 2025
Forecast Valid:
7am EST Nov 23, 2025-6pm EST Nov 29, 2025
 
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