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

53°F

12°C

Humidity 64%
Wind Speed NW 6 mph
Barometer 29.86 in (1011.1 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 10 Nov 11:56 pm EST
Extended Forecast for

Old Lyme CT

  • Overnight

    Overnight: Clear, with a low around 44. Northwest wind around 9 mph.

    Low: 44 °F

    Clear

  • Veterans Day

    Veterans Day: Mostly sunny, with a high near 60. Northwest wind 5 to 7 mph becoming light and variable in the afternoon.

    High: 60 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 43. Calm wind becoming southeast around 5 mph after midnight.

    Low: 43 °F

    Mostly Cloudy

  • Thursday

    Thursday: Rain, mainly after 1pm. High near 60. East wind 8 to 13 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 60 °F

    Chance Rain
    then Rain

  • Thursday Night

    Thursday Night: Rain. Low around 42. Northeast wind around 11 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 42 °F

    Rain

  • Friday

    Friday: Rain. High near 51. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 51 °F

    Rain

  • Friday Night

    Friday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 34.

    Low: 34 °F

    Chance Rain

  • Saturday

    Saturday: A 30 percent chance of rain before 1pm. Mostly cloudy, with a high near 49.

    High: 49 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 44. Northwest wind around 9 mph.
Veterans Day
Mostly sunny, with a high near 60. Northwest wind 5 to 7 mph becoming light and variable in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 43. Calm wind becoming southeast around 5 mph after midnight.
Thursday
Rain, mainly after 1pm. High near 60. East wind 8 to 13 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain. Low around 42. Northeast wind around 11 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Rain. High near 51. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 34.
Saturday
A 30 percent chance of rain before 1pm. Mostly cloudy, with a high near 49.
Saturday Night
Partly cloudy, with a low around 31.
Sunday
Mostly sunny, with a high near 52.
Sunday Night
Mostly clear, with a low around 30.
Monday
Sunny, with a high near 53.
Monday Night
Partly cloudy, with a low around 30.
Tuesday
Sunny, with a high near 53.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Old Lyme CT
 41.31°N 72.33°W (Elev. 43 ft)
Last Update:
6:08 pm EST Nov 10, 2026
Forecast Valid:
12am EST Nov 11, 2026-6pm EST Nov 17, 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