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

33°F

1°C

Humidity 96%
Wind Speed W 3 mph
Barometer 30.20 in (1022.7 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 4 Mar 5:56 am EST
Extended Forecast for

3 Miles SE South Lyme CT

  • Today

    Today: Patchy fog before 9am. Otherwise, partly sunny, with a high near 45. Light southwest wind.

    High: 45 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: A slight chance of rain or freezing rain after 4am. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 32. Calm wind. Chance of precipitation is 20%.

    Low: 32 °F

    Slight Chance
    Rain/Freezing
    Rain and
    Patchy Fog

  • Thursday

    Thursday: A slight chance of rain or freezing rain before 7am, then rain likely. Patchy fog before 10am. Otherwise, cloudy, with a high near 41. Calm wind becoming northeast 5 to 7 mph in the afternoon. Chance of precipitation is 70%. Little or no ice accumulation expected.

    High: 41 °F

    Rain/Freezing
    Rain Likely
    and Patchy
    Fog then Rain
    Likely

  • Thursday Night

    Thursday Night: Rain. Low around 36. Northeast wind 10 to 13 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 36 °F

    Rain

  • Friday

    Friday: A 40 percent chance of rain before 1pm. Mostly cloudy, with a high near 43. Northeast wind 8 to 13 mph.

    High: 43 °F

    Chance Rain

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

  • Saturday

    Saturday: Cloudy, with a high near 49.

    High: 49 °F

    Cloudy

  • Saturday Night

    Saturday Night: Showers likely before 1am. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.

    Low: 42 °F

    Showers
    Likely

  • Sunday

    Sunday: Partly sunny, with a high near 52.

    High: 52 °F

    Partly Sunny

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, partly sunny, with a high near 45. Light southwest wind.
Tonight
A slight chance of rain or freezing rain after 4am. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 32. Calm wind. Chance of precipitation is 20%.
Thursday
A slight chance of rain or freezing rain before 7am, then rain likely. Patchy fog before 10am. Otherwise, cloudy, with a high near 41. Calm wind becoming northeast 5 to 7 mph in the afternoon. Chance of precipitation is 70%. Little or no ice accumulation expected.
Thursday Night
Rain. Low around 36. Northeast wind 10 to 13 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Friday
A 40 percent chance of rain before 1pm. Mostly cloudy, with a high near 43. Northeast wind 8 to 13 mph.
Friday Night
Mostly cloudy, with a low around 36.
Saturday
Cloudy, with a high near 49.
Saturday Night
Showers likely before 1am. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.
Sunday
Partly sunny, with a high near 52.
Sunday Night
Partly cloudy, with a low around 40.
Monday
Sunny, with a high near 54.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Mostly sunny, with a high near 54.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE South Lyme CT
 41.3°N 72.24°W (Elev. 0 ft)
Last Update:
6:26 am EST Mar 4, 2026
Forecast Valid:
6am EST Mar 4, 2026-6pm EDT Mar 10, 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