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

67°F

19°C

Humidity 61%
Wind Speed NA
Barometer 29.91 in (1012.9 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 3 Sep 4:56 pm EDT
Extended Forecast for

3 Miles SE Old Lyme CT

  • Tonight

    Tonight: Mostly clear, with a low around 56. South wind 5 to 7 mph becoming calm after midnight.

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 76. Light south wind becoming southeast 5 to 10 mph in the morning.

    High: 76 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers, mainly after 2am. Increasing clouds, with a low around 63. South wind around 8 mph.

    Low: 63 °F

    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 79. South wind 8 to 14 mph.

    High: 79 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 68. Southwest wind around 10 mph, with gusts as high as 21 mph.

    Low: 68 °F

    Mostly Clear

  • Saturday

    Saturday: A 40 percent chance of showers after 2pm. Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly after 8pm. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.

    Low: 60 °F

    Showers
    Likely

  • Sunday

    Sunday: A 40 percent chance of showers. Mostly cloudy, with a high near 72.

    High: 72 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 56. South wind 5 to 7 mph becoming calm after midnight.
Thursday
Mostly sunny, with a high near 76. Light south wind becoming southeast 5 to 10 mph in the morning.
Thursday Night
A 30 percent chance of showers, mainly after 2am. Increasing clouds, with a low around 63. South wind around 8 mph.
Friday
Mostly sunny, with a high near 79. South wind 8 to 14 mph.
Friday Night
Mostly clear, with a low around 68. Southwest wind around 10 mph, with gusts as high as 21 mph.
Saturday
A 40 percent chance of showers after 2pm. Mostly sunny, with a high near 80.
Saturday Night
Showers likely, mainly after 8pm. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.
Sunday
A 40 percent chance of showers. Mostly cloudy, with a high near 72.
Sunday Night
Partly cloudy, with a low around 56.
Monday
Mostly sunny, with a high near 73.
Monday Night
Mostly clear, with a low around 54.
Tuesday
Mostly sunny, with a high near 71.
Tuesday Night
Partly cloudy, with a low around 54.
Wednesday
Partly sunny, with a high near 71.
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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:
3:05 pm EDT Sep 3, 2025
Forecast Valid:
5pm EDT Sep 3, 2025-6pm EDT Sep 10, 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