National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Groton / New London, Groton / New London Airport (KGON)

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Fair

76°F

24°C

Humidity 85%
Wind Speed S 5 mph
Barometer 29.79 in (1008.6 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 19 Jun 1:56 pm EDT
Extended Forecast for

Old Lyme CT

  • Juneteenth

    Juneteenth: A 30 percent chance of showers and thunderstorms after 5pm. Some of the storms could be severe. Mostly sunny, with a steady temperature around 78. Southwest wind around 11 mph, with gusts as high as 22 mph.

    High: 78 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Some of the storms could be severe. Mostly cloudy, with a low around 65. Southwest wind around 9 mph, with gusts as high as 21 mph.

    Low: 65 °F

    Severe
    Thunderstorms

  • Friday

    Friday: Sunny, with a high near 79. West wind 13 to 16 mph.

    High: 79 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 64. West wind 5 to 8 mph becoming calm after midnight.

    Low: 64 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 80. Southwest wind 3 to 8 mph.

    High: 80 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 66.

    Low: 66 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 83.

    High: 83 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

Detailed Forecast

Juneteenth
A 30 percent chance of showers and thunderstorms after 5pm. Some of the storms could be severe. Mostly sunny, with a steady temperature around 78. Southwest wind around 11 mph, with gusts as high as 22 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Some of the storms could be severe. Mostly cloudy, with a low around 65. Southwest wind around 9 mph, with gusts as high as 21 mph.
Friday
Sunny, with a high near 79. West wind 13 to 16 mph.
Friday Night
Partly cloudy, with a low around 64. West wind 5 to 8 mph becoming calm after midnight.
Saturday
Mostly sunny, with a high near 80. Southwest wind 3 to 8 mph.
Saturday Night
Mostly cloudy, with a low around 66.
Sunday
Partly sunny, with a high near 83.
Sunday Night
Partly cloudy, with a low around 69.
Monday
Sunny, with a high near 88.
Monday Night
Mostly clear, with a low around 71.
Tuesday
Sunny, with a high near 91.
Tuesday Night
Partly cloudy, with a low around 72.
Wednesday
Mostly sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Old Lyme CT
 41.29°N 72.33°W (Elev. 16 ft)
Last Update:
2:38 pm EDT Jun 19, 2025
Forecast Valid:
2pm EDT Jun 19, 2025-6pm EDT Jun 25, 2025
 
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