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.

Fog/Mist

49°F

9°C

Humidity 97%
Wind Speed SW 6 mph
Barometer 30.12 in (1019.9 mb)
Dewpoint 48°F (9°C)
Visibility 4.00 mi
Wind Chill46°F (8°C)
Last update 3 Apr 8:56 pm EDT
Extended Forecast for

3 Miles SE South Lyme CT

  • Tonight

    Tonight: Widespread dense fog, mainly after 5am. Otherwise, mostly cloudy, with a low around 48. Southwest wind 8 to 10 mph.

    Low: 48 °F

    Dense Fog

  • Saturday

    Saturday: A 20 percent chance of showers after 2pm. Widespread dense fog before 8am. Otherwise, mostly cloudy through mid morning, then becoming sunny, with a high near 59. North wind 5 to 13 mph becoming southeast in the afternoon.

    High: 59 °F

    Dense Fog
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: A 50 percent chance of showers, mainly after 8pm. Cloudy, with a low around 41. East wind 9 to 16 mph.

    Low: 41 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm, then showers after 2pm. High near 55. Southwest wind 13 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 55 °F

    Showers

  • Sunday Night

    Sunday Night: Showers, mainly before 8pm. Low around 41. Northwest wind around 11 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 41 °F

    Showers then
    Slight Chance
    Showers

  • Monday

    Monday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of rain and snow showers before 2pm. Mostly sunny, with a high near 47. Chance of precipitation is 30%.

    High: 47 °F

    Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

Detailed Forecast

Tonight
Widespread dense fog, mainly after 5am. Otherwise, mostly cloudy, with a low around 48. Southwest wind 8 to 10 mph.
Saturday
A 20 percent chance of showers after 2pm. Widespread dense fog before 8am. Otherwise, mostly cloudy through mid morning, then becoming sunny, with a high near 59. North wind 5 to 13 mph becoming southeast in the afternoon.
Saturday Night
A 50 percent chance of showers, mainly after 8pm. Cloudy, with a low around 41. East wind 9 to 16 mph.
Sunday
Showers likely and possibly a thunderstorm, then showers after 2pm. High near 55. Southwest wind 13 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers, mainly before 8pm. Low around 41. Northwest wind around 11 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Sunny, with a high near 50.
Monday Night
Partly cloudy, with a low around 38.
Tuesday
A chance of rain and snow showers before 2pm. Mostly sunny, with a high near 47. Chance of precipitation is 30%.
Tuesday Night
Mostly clear, with a low around 30.
Wednesday
Sunny, with a high near 44.
Wednesday Night
Mostly clear, with a low around 36.
Thursday
Mostly sunny, with a high near 51.
Thursday Night
Partly cloudy, with a low around 43.
Friday
Mostly sunny, with a high near 57.
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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:
2:23 pm EDT Apr 3, 2026
Forecast Valid:
9pm EDT Apr 3, 2026-6pm EDT Apr 10, 2026
 
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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