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

39°F

4°C

Humidity 57%
Wind Speed S 7 mph
Barometer 30.59 in (1035.8 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 8 Apr 6:56 pm EDT
Extended Forecast for

3 Miles SE Old Lyme CT

  • Tonight

    Tonight: Widespread frost, mainly after 5am. Otherwise, clear, with a low around 31. Light south wind.

    Low: 31 °F

    Frost

  • Thursday

    Thursday: Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 48. Calm wind becoming southeast 5 to 7 mph in the afternoon.

    High: 48 °F

    Frost then
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 36. Light south wind.

    Low: 36 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 55. Calm wind becoming southwest 5 to 8 mph in the morning.

    High: 55 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 44. South wind around 7 mph.

    Low: 44 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, then gradually becoming sunny, with a high near 57.

    High: 57 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 53.

    High: 53 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Widespread frost, mainly after 5am. Otherwise, clear, with a low around 31. Light south wind.
Thursday
Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 48. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 36. Light south wind.
Friday
Sunny, with a high near 55. Calm wind becoming southwest 5 to 8 mph in the morning.
Friday Night
A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 44. South wind around 7 mph.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 57.
Saturday Night
Mostly clear, with a low around 38.
Sunday
Sunny, with a high near 53.
Sunday Night
Mostly cloudy, with a low around 43.
Monday
Mostly cloudy, with a high near 61.
Monday Night
Mostly cloudy, with a low around 52.
Tuesday
Mostly sunny, with a high near 69.
Tuesday Night
Mostly cloudy, with a low around 54.
Wednesday
Partly sunny, with a high near 68.
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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:
5:30 pm EDT Apr 8, 2026
Forecast Valid:
7pm EDT Apr 8, 2026-6pm EDT Apr 15, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation