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

22°F

-6°C

Humidity 89%
Wind Speed N 3 mph
Barometer 30.15 in (1020.8 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Last update 28 Feb 3:56 am EST
Extended Forecast for

3 Miles SE Old Lyme CT

  • Today

    Today: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 43. South wind 3 to 7 mph.

    High: 43 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Patchy fog between 10pm and midnight. Otherwise, partly cloudy, with a low around 28. Light and variable wind becoming north 5 to 8 mph after midnight.

    Low: 28 °F

    Patchy Fog
    then Mostly
    Clear

  • Sunday

    Sunday: Snow likely, mainly between 10am and 4pm. Increasing clouds, with a high near 37. Wind chill values between 20 and 30. North wind 6 to 8 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 37 °F

    Snow Likely

  • Sunday Night

    Sunday Night: A 30 percent chance of snow before 7pm. Mostly clear, with a low around 13. Wind chill values between 5 and 10. North wind 8 to 13 mph.

    Low: 13 °F

    Chance Snow
    then Mostly
    Clear

  • Monday

    Monday: Sunny, with a high near 29. North wind 6 to 8 mph.

    High: 29 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 17.

    Low: 17 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 50 percent chance of rain after 1pm. Increasing clouds, with a high near 41.

    High: 41 °F

    Partly Sunny
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: Rain. Low around 35. Chance of precipitation is 90%.

    Low: 35 °F

    Rain

  • Wednesday

    Wednesday: A 30 percent chance of rain before 1pm. Partly sunny, with a high near 46.

    High: 46 °F

    Chance Rain

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 43. South wind 3 to 7 mph.
Tonight
Patchy fog between 10pm and midnight. Otherwise, partly cloudy, with a low around 28. Light and variable wind becoming north 5 to 8 mph after midnight.
Sunday
Snow likely, mainly between 10am and 4pm. Increasing clouds, with a high near 37. Wind chill values between 20 and 30. North wind 6 to 8 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Sunday Night
A 30 percent chance of snow before 7pm. Mostly clear, with a low around 13. Wind chill values between 5 and 10. North wind 8 to 13 mph.
Monday
Sunny, with a high near 29. North wind 6 to 8 mph.
Monday Night
Mostly clear, with a low around 17.
Tuesday
A 50 percent chance of rain after 1pm. Increasing clouds, with a high near 41.
Tuesday Night
Rain. Low around 35. Chance of precipitation is 90%.
Wednesday
A 30 percent chance of rain before 1pm. Partly sunny, with a high near 46.
Wednesday Night
A 30 percent chance of rain after 1am. Mostly cloudy, with a low around 33.
Thursday
A 40 percent chance of rain. Cloudy, with a high near 46.
Thursday Night
A 50 percent chance of rain. Cloudy, with a low around 40.
Friday
A 30 percent chance of rain. Cloudy, with a high near 49.
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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:
12:55 am EST Feb 28, 2026
Forecast Valid:
4am EST Feb 28, 2026-6pm EST Mar 6, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation