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

66°F

19°C

Humidity 90%
Wind Speed Calm
Barometer 30.12 in (1020.0 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 4 Aug 9:56 pm EDT
Extended Forecast for

3 Miles N Hadlyme CT

  • Tonight

    Tonight: Patchy fog between 4am and 5am. Otherwise, mostly cloudy, with a low around 60. Calm wind.

    Low: 60 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 83. Calm wind becoming south around 5 mph in the afternoon.

    High: 83 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Patchy fog before 1am, then patchy fog after 2am. Otherwise, mostly cloudy, with a low around 69. Calm wind. Chance of precipitation is 40%.

    Low: 69 °F

    Chance
    Showers and
    Patchy Fog

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87. Heat index values as high as 97. Calm wind becoming southwest 5 to 8 mph in the morning.

    High: 87 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 71. Light southwest wind. Chance of precipitation is 20%.

    Low: 71 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88.

    High: 88 °F

    Sunny then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 70.

    Low: 70 °F

    Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 71.

    Low: 71 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog between 4am and 5am. Otherwise, mostly cloudy, with a low around 60. Calm wind.
Wednesday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 83. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
A chance of showers and thunderstorms. Patchy fog before 1am, then patchy fog after 2am. Otherwise, mostly cloudy, with a low around 69. Calm wind. Chance of precipitation is 40%.
Thursday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87. Heat index values as high as 97. Calm wind becoming southwest 5 to 8 mph in the morning.
Thursday Night
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 71. Light southwest wind. Chance of precipitation is 20%.
Friday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88.
Friday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 70.
Saturday
Mostly sunny, with a high near 87.
Saturday Night
Partly cloudy, with a low around 71.
Sunday
Sunny, with a high near 87.
Sunday Night
Mostly clear, with a low around 69.
Monday
Sunny, with a high near 88.
Monday Night
Partly cloudy, with a low around 68.
Tuesday
A 30 percent chance of showers. Mostly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Hadlyme CT
 41.44°N 72.33°W (Elev. 95 ft)
Last Update:
4:10 pm EDT Aug 4, 2026
Forecast Valid:
10pm EDT Aug 4, 2026-6pm EDT Aug 11, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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