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.

Overcast

48°F

9°C

Humidity 89%
Wind Speed S 8 mph
Barometer 30.21 in (1022.8 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 3 Apr 1:56 pm EDT
Extended Forecast for

3 Miles SE Old Lyme CT

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 52. Southwest wind around 9 mph.

    High: 52 °F

    Partly Sunny

  • Tonight

    Tonight: Widespread dense fog, mainly after 5am. Otherwise, mostly cloudy, with a low around 48. Southwest wind 6 to 9 mph.

    Low: 48 °F

    Dense Fog

  • Saturday

    Saturday: A 20 percent chance of showers after 2pm. Widespread dense fog, mainly before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 60. Light and variable wind becoming east 5 to 10 mph in the afternoon.

    High: 60 °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 40. East wind 8 to 13 mph, with gusts as high as 23 mph.

    Low: 40 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm, then showers after 2pm. High near 57. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 57 °F

    Showers

  • Sunday Night

    Sunday Night: Showers before 8pm. Low around 40. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 40 °F

    Showers then
    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of rain and snow showers before 2pm. Mostly sunny, with a high near 49. Chance of precipitation is 30%.

    High: 49 °F

    Chance
    Rain/Snow

Detailed Forecast

This Afternoon
Partly sunny, with a high near 52. Southwest wind around 9 mph.
Tonight
Widespread dense fog, mainly after 5am. Otherwise, mostly cloudy, with a low around 48. Southwest wind 6 to 9 mph.
Saturday
A 20 percent chance of showers after 2pm. Widespread dense fog, mainly before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 60. Light and variable wind becoming east 5 to 10 mph in the afternoon.
Saturday Night
A 50 percent chance of showers, mainly after 8pm. Cloudy, with a low around 40. East wind 8 to 13 mph, with gusts as high as 23 mph.
Sunday
Showers likely and possibly a thunderstorm, then showers after 2pm. High near 57. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers before 8pm. Low around 40. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Sunny, with a high near 52.
Monday Night
Partly cloudy, with a low around 37.
Tuesday
A chance of rain and snow showers before 2pm. Mostly sunny, with a high near 49. Chance of precipitation is 30%.
Tuesday Night
Mostly clear, with a low around 30.
Wednesday
Sunny, with a high near 46.
Wednesday Night
Mostly clear, with a low around 36.
Thursday
Sunny, with a high near 53.
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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:
2:23 pm EDT Apr 3, 2026
Forecast Valid:
2pm EDT Apr 3, 2026-6pm EDT Apr 9, 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