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

46°F

8°C

Humidity 35%
Wind Speed N 6 mph
Barometer 30.20 in (1022.7 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 20 Nov 11:56 am EST
Extended Forecast for

3 Miles ESE South Lyme CT

  • This Afternoon

    This Afternoon: Partly sunny, then gradually becoming sunny, with a high near 46. North wind around 5 mph becoming light and variable.

    High: 46 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 33. Calm wind.

    Low: 33 °F

    Mostly Clear

  • Friday

    Friday: Mostly cloudy, with a high near 53. Light and variable wind becoming southwest 5 to 10 mph in the morning.

    High: 53 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 40. Southwest wind 5 to 7 mph becoming northwest after midnight.

    Low: 40 °F

    Chance Rain

  • Saturday

    Saturday: A 20 percent chance of rain before 1pm. Partly sunny, with a high near 50. Northwest wind 7 to 11 mph.

    High: 50 °F

    Slight Chance
    Rain

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

  • Sunday Night

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

    Low: 37 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 52.

    High: 52 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, then gradually becoming sunny, with a high near 46. North wind around 5 mph becoming light and variable.
Tonight
Mostly clear, with a low around 33. Calm wind.
Friday
Mostly cloudy, with a high near 53. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Friday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 40. Southwest wind 5 to 7 mph becoming northwest after midnight.
Saturday
A 20 percent chance of rain before 1pm. Partly sunny, with a high near 50. Northwest wind 7 to 11 mph.
Saturday Night
Mostly clear, with a low around 31.
Sunday
Mostly sunny, with a high near 48.
Sunday Night
Partly cloudy, with a low around 37.
Monday
Mostly sunny, with a high near 52.
Monday Night
Mostly cloudy, with a low around 36.
Tuesday
A 30 percent chance of rain. Mostly cloudy, with a high near 54.
Tuesday Night
Rain likely. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE South Lyme CT
 41.3°N 72.27°W (Elev. 75 ft)
Last Update:
11:16 am EST Nov 20, 2025
Forecast Valid:
12pm EST Nov 20, 2025-6pm EST Nov 26, 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