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

79°F

26°C

Humidity 94%
Wind Speed S 10 mph
Barometer 29.98 in (1015.3 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 16 Jul 3:56 pm EDT
Extended Forecast for

4 Miles NNW Hadlyme CT

Heat Advisory July 16, 04:36pm until July 17, 10:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 16, 04:36pm until July 17, 10:00pm

    NOW until 10:00pm Thu

    Heat Advisory

  • Tonight

    Low: 73 °F

    Patchy Fog
    then Chance
    T-storms and
    Patchy Fog

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly between 8am and 11am. Mostly cloudy, with a high near 87. Heat index values as high as 96. Southwest wind 5 to 10 mph. Chance of precipitation is 60%.

    High: 87 °F

    T-storms
    Likely

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 69. Southwest wind around 8 mph becoming northwest after midnight.

    Low: 69 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 85. Northwest wind 9 to 11 mph.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 62. North wind 3 to 5 mph.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 66.

    Low: 66 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 8am. Mostly cloudy, with a high near 80. Chance of precipitation is 50%.

    High: 80 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Patchy fog after 8pm. Otherwise, increasing clouds, with a low around 73. South wind 3 to 7 mph.
Thursday
Showers and thunderstorms likely, mainly between 8am and 11am. Mostly cloudy, with a high near 87. Heat index values as high as 96. Southwest wind 5 to 10 mph. Chance of precipitation is 60%.
Thursday Night
Partly cloudy, with a low around 69. Southwest wind around 8 mph becoming northwest after midnight.
Friday
Sunny, with a high near 85. Northwest wind 9 to 11 mph.
Friday Night
Mostly clear, with a low around 62. North wind 3 to 5 mph.
Saturday
Mostly sunny, with a high near 82.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 66.
Sunday
A chance of showers, with thunderstorms also possible after 8am. Mostly cloudy, with a high near 80. Chance of precipitation is 50%.
Sunday Night
Partly cloudy, with a low around 66.
Monday
Mostly sunny, with a high near 83.
Monday Night
Partly cloudy, with a low around 63.
Tuesday
Mostly sunny, with a high near 81.
Tuesday Night
Mostly cloudy, with a low around 65.
Wednesday
Partly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Hadlyme CT
 41.47°N 72.35°W (Elev. 397 ft)
Last Update:
2:07 pm EDT Jul 16, 2025
Forecast Valid:
4pm EDT Jul 16, 2025-6pm EDT Jul 23, 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