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 40%
Wind Speed N 16 G 28 mph
Barometer 29.80 in (1009.0 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 16 Oct 4:56 pm EDT
Extended Forecast for

Old Lyme CTSimilar City Names

  • Tonight

    Tonight: Clear, with a low around 40. North wind 9 to 17 mph, with gusts as high as 30 mph.

    Low: 40 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 63. North wind around 11 mph, with gusts as high as 21 mph.

    High: 63 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 40. North wind 3 to 6 mph.

    Low: 40 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 63. Light and variable wind becoming west around 6 mph in the afternoon.

    High: 63 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 50. Calm wind.

    Low: 50 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Showers, mainly after 8pm. Low around 53. Chance of precipitation is 80%.

    Low: 53 °F

    Showers

  • Monday

    Monday: Showers, mainly before 8am. High near 66. Chance of precipitation is 80%.

    High: 66 °F

    Showers then
    Chance
    Showers

  • Monday Night

    Monday Night: A 30 percent chance of showers. Partly cloudy, with a low around 48.

    Low: 48 °F

    Chance
    Showers

Detailed Forecast

Tonight
Clear, with a low around 40. North wind 9 to 17 mph, with gusts as high as 30 mph.
Friday
Sunny, with a high near 63. North wind around 11 mph, with gusts as high as 21 mph.
Friday Night
Mostly clear, with a low around 40. North wind 3 to 6 mph.
Saturday
Sunny, with a high near 63. Light and variable wind becoming west around 6 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 50. Calm wind.
Sunday
Mostly sunny, with a high near 67.
Sunday Night
Showers, mainly after 8pm. Low around 53. Chance of precipitation is 80%.
Monday
Showers, mainly before 8am. High near 66. Chance of precipitation is 80%.
Monday Night
A 30 percent chance of showers. Partly cloudy, with a low around 48.
Tuesday
Mostly sunny, with a high near 66.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.
Wednesday
Showers likely. Partly sunny, with a high near 63. Chance of precipitation is 60%.
Wednesday Night
Partly cloudy, with a low around 46.
Thursday
Mostly sunny, with a high near 62.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Old Lyme CTSimilar City Names
 41.31°N 72.33°W (Elev. 43 ft)
Last Update:
2:14 pm EDT Oct 16, 2025
Forecast Valid:
5pm EDT Oct 16, 2025-6pm EDT Oct 23, 2025
 
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