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

39°F

4°C

Humidity 89%
Wind Speed N 12 mph
Barometer 29.79 in (1008.8 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 23 Mar 11:56 am EDT
Extended Forecast for

3 Miles SE Old Lyme CT

  • This Afternoon

    This Afternoon: A chance of rain before 2pm, then a chance of showers after 2pm. Cloudy, with a high near 41. North wind around 10 mph. Chance of precipitation is 50%.

    High: 41 °F

    Chance Rain

  • Tonight

    Tonight: A 30 percent chance of showers before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 31. Wind chill values between 25 and 30. Northwest wind 6 to 9 mph, with gusts as high as 20 mph.

    Low: 31 °F

    Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 45. Wind chill values between 25 and 35 early. North wind 6 to 8 mph becoming southwest in the afternoon.

    High: 45 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 34. Southwest wind around 7 mph.

    Low: 34 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 48. Southwest wind 6 to 11 mph, with gusts as high as 21 mph.

    High: 48 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 53.

    High: 53 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Rain likely after 2am. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.

    Low: 43 °F

    Mostly Cloudy
    then Rain
    Likely

  • Friday

    Friday: Rain likely, mainly before 8am. Mostly cloudy, with a high near 52. Chance of precipitation is 60%.

    High: 52 °F

    Rain Likely

Detailed Forecast

This Afternoon
A chance of rain before 2pm, then a chance of showers after 2pm. Cloudy, with a high near 41. North wind around 10 mph. Chance of precipitation is 50%.
Tonight
A 30 percent chance of showers before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 31. Wind chill values between 25 and 30. Northwest wind 6 to 9 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 45. Wind chill values between 25 and 35 early. North wind 6 to 8 mph becoming southwest in the afternoon.
Tuesday Night
Increasing clouds, with a low around 34. Southwest wind around 7 mph.
Wednesday
Partly sunny, with a high near 48. Southwest wind 6 to 11 mph, with gusts as high as 21 mph.
Wednesday Night
Mostly cloudy, with a low around 40.
Thursday
Mostly cloudy, with a high near 53.
Thursday Night
Rain likely after 2am. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Friday
Rain likely, mainly before 8am. Mostly cloudy, with a high near 52. Chance of precipitation is 60%.
Friday Night
Partly cloudy, with a low around 26.
Saturday
Sunny, with a high near 40.
Saturday Night
Mostly clear, with a low around 29.
Sunday
Sunny, with a high near 45.
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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:
2:12 am EDT Mar 23, 2026
Forecast Valid:
12pm EDT Mar 23, 2026-6pm EDT Mar 29, 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