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

37°F

3°C

Humidity 89%
Wind Speed SW 5 mph
Barometer 30.20 in (1022.4 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 19 Mar 11:56 pm EDT
Extended Forecast for

3 Miles SE South Lyme CT

  • Overnight

    Overnight: Partly cloudy, with a low around 33. Southwest wind around 6 mph.

    Low: 33 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of rain after 5pm. Mostly sunny, with a high near 46. Light and variable wind becoming south 8 to 13 mph in the afternoon.

    High: 46 °F

    Mostly Sunny
    then Chance
    Rain

  • Friday Night

    Friday Night: Rain likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 41. Southwest wind 10 to 17 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 41 °F

    Rain Likely

  • Saturday

    Saturday: A 30 percent chance of rain before 8am. Mostly sunny, with a high near 52. Northwest wind around 8 mph.

    High: 52 °F

    Chance Rain
    then Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 38. Northwest wind around 6 mph becoming southeast after midnight.

    Low: 38 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 30 percent chance of rain after 2pm. Mostly cloudy, with a high near 50.

    High: 50 °F

    Mostly Cloudy
    then Chance
    Rain

  • Sunday Night

    Sunday Night: Rain likely, mainly after 2am. Mostly cloudy, with a low around 39. Chance of precipitation is 60%.

    Low: 39 °F

    Rain Likely

  • Monday

    Monday: Rain likely, mainly before 8am. Mostly cloudy, with a high near 48. Chance of precipitation is 60%.

    High: 48 °F

    Rain Likely
    then Chance
    Rain

  • Monday Night

    Monday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 33. Southwest wind around 6 mph.
Friday
A 30 percent chance of rain after 5pm. Mostly sunny, with a high near 46. Light and variable wind becoming south 8 to 13 mph in the afternoon.
Friday Night
Rain likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 41. Southwest wind 10 to 17 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
A 30 percent chance of rain before 8am. Mostly sunny, with a high near 52. Northwest wind around 8 mph.
Saturday Night
Mostly cloudy, with a low around 38. Northwest wind around 6 mph becoming southeast after midnight.
Sunday
A 30 percent chance of rain after 2pm. Mostly cloudy, with a high near 50.
Sunday Night
Rain likely, mainly after 2am. Mostly cloudy, with a low around 39. Chance of precipitation is 60%.
Monday
Rain likely, mainly before 8am. Mostly cloudy, with a high near 48. Chance of precipitation is 60%.
Monday Night
Mostly clear, with a low around 30.
Tuesday
Mostly sunny, with a high near 43.
Tuesday Night
Partly cloudy, with a low around 33.
Wednesday
Partly sunny, with a high near 44.
Wednesday Night
Mostly cloudy, with a low around 32.
Thursday
Partly sunny, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE South Lyme CT
 41.3°N 72.24°W (Elev. 0 ft)
Last Update:
6:12 pm EDT Mar 19, 2026
Forecast Valid:
12am EDT Mar 20, 2026-6pm EDT Mar 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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