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

41°F

5°C

Humidity 51%
Wind Speed SW 15 G 23 mph
Barometer 30.00 in (1015.9 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 13 Jan 11:56 am EST
Extended Forecast for

3 Miles SE Old Lyme CT

  • This Afternoon

    This Afternoon: Mostly sunny, with a steady temperature around 41. South wind around 9 mph.

    High: 41 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 38. South wind 8 to 11 mph, with gusts as high as 23 mph.

    Low: 38 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: A 20 percent chance of rain before 10am. Mostly cloudy, with a high near 46. Southwest wind 6 to 9 mph.

    High: 46 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain, mainly after 1am. Cloudy, with a low around 31. South wind 3 to 6 mph.

    Low: 31 °F

    Chance Rain

  • Thursday

    Thursday: A 20 percent chance of rain before 1pm. Partly sunny, with a temperature rising to near 38 by 10am, then falling to around 29 during the remainder of the day. West wind 8 to 14 mph.

    High: 38 °F⇓

    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 17.

    Low: 17 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 35.

    High: 35 °F

    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a steady temperature around 41. South wind around 9 mph.
Tonight
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 38. South wind 8 to 11 mph, with gusts as high as 23 mph.
Wednesday
A 20 percent chance of rain before 10am. Mostly cloudy, with a high near 46. Southwest wind 6 to 9 mph.
Wednesday Night
A 40 percent chance of rain, mainly after 1am. Cloudy, with a low around 31. South wind 3 to 6 mph.
Thursday
A 20 percent chance of rain before 1pm. Partly sunny, with a temperature rising to near 38 by 10am, then falling to around 29 during the remainder of the day. West wind 8 to 14 mph.
Thursday Night
Partly cloudy, with a low around 17.
Friday
Sunny, with a high near 35.
Friday Night
Mostly cloudy, with a low around 29.
Saturday
Mostly sunny, with a high near 41.
Saturday Night
Mostly cloudy, with a low around 27.
Sunday
Partly sunny, with a high near 35.
Sunday Night
Partly cloudy, with a low around 22.
M.L.King Day
Mostly sunny, with a high near 32.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Old Lyme CT
 41.28°N 72.3°W (Elev. 0 ft)
Last Update:
12:35 pm EST Jan 13, 2026
Forecast Valid:
12pm EST Jan 13, 2026-6pm EST Jan 19, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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