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 57%
Wind Speed SW 15 mph
Barometer 30.00 in (1015.8 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 13 Mar 4:56 pm EDT
Extended Forecast for

3 Miles SE Old Lyme CT

  • Tonight

    Tonight: A chance of showers between 11pm and 2am. Mostly cloudy, then gradually becoming mostly clear, with a low around 37. South wind 10 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.

    Low: 37 °F

    Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 47. Breezy, with a west wind 17 to 21 mph, with gusts as high as 39 mph.

    High: 47 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 31. Northwest wind 6 to 14 mph.

    Low: 31 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, with a high near 45. Calm wind becoming southeast 5 to 9 mph in the afternoon.

    High: 45 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Rain likely after 2am. Mostly cloudy, with a low around 37. Southeast wind 10 to 17 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 37 °F

    Mostly Cloudy
    then Rain
    Likely

  • Monday

    Monday: Rain. High near 56. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    High: 56 °F

    Rain

  • Monday Night

    Monday Night: Rain and possibly a thunderstorm. Low around 37. Breezy. Chance of precipitation is 100%.

    Low: 37 °F

    Rain and
    Breezy

  • Tuesday

    Tuesday: Rain likely before 8am. Mostly sunny, with a high near 46. Chance of precipitation is 60%.

    High: 46 °F

    Rain Likely
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of showers between 11pm and 2am. Mostly cloudy, then gradually becoming mostly clear, with a low around 37. South wind 10 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.
Saturday
Sunny, with a high near 47. Breezy, with a west wind 17 to 21 mph, with gusts as high as 39 mph.
Saturday Night
Increasing clouds, with a low around 31. Northwest wind 6 to 14 mph.
Sunday
Mostly cloudy, with a high near 45. Calm wind becoming southeast 5 to 9 mph in the afternoon.
Sunday Night
Rain likely after 2am. Mostly cloudy, with a low around 37. Southeast wind 10 to 17 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Rain. High near 56. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Monday Night
Rain and possibly a thunderstorm. Low around 37. Breezy. Chance of precipitation is 100%.
Tuesday
Rain likely before 8am. Mostly sunny, with a high near 46. Chance of precipitation is 60%.
Tuesday Night
Mostly clear, with a low around 24.
Wednesday
Mostly sunny, with a high near 38.
Wednesday Night
Mostly cloudy, with a low around 30.
Thursday
Partly sunny, with a high near 43.
Thursday Night
Partly cloudy, with a low around 33.
Friday
Partly sunny, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Old Lyme CT
 41.28°N 72.3°W (Elev. 0 ft)
Last Update:
2:26 pm EDT Mar 13, 2026
Forecast Valid:
5pm EDT Mar 13, 2026-6pm EDT Mar 20, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation