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.

A Few Clouds

77°F

25°C

Humidity 47%
Wind Speed W 9 mph
Barometer 29.61 in (1002.6 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 19 Jun 5:56 pm EDT
Extended Forecast for

3 Miles SE Old Lyme CT

  • Tonight

    Tonight: Mostly clear, with a low around 63. West wind 9 to 11 mph, with gusts as high as 22 mph.

    Low: 63 °F

    Mostly Clear

  • Saturday

    Saturday: Increasing clouds, with a high near 79. West wind 14 to 16 mph, with gusts as high as 28 mph.

    High: 79 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming clear, with a low around 61. Northwest wind 5 to 7 mph.

    Low: 61 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Increasing clouds, with a high near 81. Southwest wind 6 to 10 mph.

    High: 81 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 62. West wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Partly Cloudy

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 74. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    High: 74 °F

    Showers
    Likely then
    Showers

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 64. Chance of precipitation is 80%.

    Low: 64 °F

    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers before 8am. Mostly sunny, with a high near 80.

    High: 80 °F

    Chance
    Showers then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 63. West wind 9 to 11 mph, with gusts as high as 22 mph.
Saturday
Increasing clouds, with a high near 79. West wind 14 to 16 mph, with gusts as high as 28 mph.
Saturday Night
Mostly cloudy, then gradually becoming clear, with a low around 61. Northwest wind 5 to 7 mph.
Sunday
Increasing clouds, with a high near 81. Southwest wind 6 to 10 mph.
Sunday Night
Partly cloudy, with a low around 62. West wind around 5 mph becoming calm in the evening.
Monday
Showers and possibly a thunderstorm. High near 74. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Monday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 64. Chance of precipitation is 80%.
Tuesday
A 30 percent chance of showers before 8am. Mostly sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 63.
Wednesday
Sunny, with a high near 80.
Wednesday Night
Mostly clear, with a low around 64.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
A 30 percent chance of showers. Partly cloudy, with a low around 64.
Friday
A 30 percent chance of showers. Mostly sunny, with a high near 78.
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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:
4:47 pm EDT Jun 19, 2026
Forecast Valid:
6pm EDT Jun 19, 2026-6pm EDT Jun 26, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation