National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Groton / New London, Groton / New London Airport (KGON)

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Fog

38°F

3°C

Humidity 100%
Wind Speed S 5 mph
Barometer 29.93 in (1013.5 mb)
Dewpoint 38°F (3°C)
Visibility 0.25 mi
Wind Chill34°F (1°C)
Last update 7 Mar 7:56 pm EST
Extended Forecast for

3 Miles SE South Lyme CT

Dense Fog Advisory until March 8, 09:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until March 8, 09:00am

    NOW until 9:00am Sun

    Dense Fog Advisory

  • Tonight

    Low: 41 °F

    Showers
    Likely and
    Patchy Fog

  • Sunday

    Sunday: Showers likely, mainly before 10am. Patchy fog before 10am. Otherwise, cloudy, with a high near 54. West wind around 10 mph. Chance of precipitation is 60%.

    High: 54 °F

    Showers
    Likely and
    Patchy Fog
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 36. West wind 3 to 6 mph.

    Low: 36 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 52. Light west wind becoming southwest 6 to 11 mph in the morning.

    High: 52 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 37. Southwest wind 3 to 8 mph.

    Low: 37 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Cloudy, with a high near 52.

    High: 52 °F

    Cloudy

Detailed Forecast

Tonight
Areas of drizzle with a chance of showers between 10pm and 4am, then showers likely with areas of drizzle after 4am. Patchy fog. Otherwise, cloudy, with a low around 41. Southwest wind 8 to 11 mph. Chance of precipitation is 60%.
Sunday
Showers likely, mainly before 10am. Patchy fog before 10am. Otherwise, cloudy, with a high near 54. West wind around 10 mph. Chance of precipitation is 60%.
Sunday Night
Partly cloudy, with a low around 36. West wind 3 to 6 mph.
Monday
Sunny, with a high near 52. Light west wind becoming southwest 6 to 11 mph in the morning.
Monday Night
Partly cloudy, with a low around 37. Southwest wind 3 to 8 mph.
Tuesday
Mostly sunny, with a high near 55.
Tuesday Night
Mostly cloudy, with a low around 42.
Wednesday
Cloudy, with a high near 52.
Wednesday Night
A 30 percent chance of showers. Cloudy, with a low around 46. Breezy.
Thursday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 53. Breezy. Chance of precipitation is 60%.
Thursday Night
A chance of rain and snow showers. Partly cloudy, with a low around 31. Breezy. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 41.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 35. Breezy.
Saturday
Mostly cloudy, 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:
3:40 pm EST Mar 7, 2026
Forecast Valid:
8pm EST Mar 7, 2026-6pm EDT Mar 14, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation