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

77°F

25°C

Humidity 71%
Wind Speed S 8 mph
Barometer 30.16 in (1021.1 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 5 Aug 1:56 pm EDT
Extended Forecast for

Ledyard CT

Heat Advisory August 6, 11:00am until August 7, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 79. Southwest wind around 7 mph.

    High: 79 °F

    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 70. Light south wind.

    Low: 70 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 86. Heat index values as high as 97. Light south wind becoming southwest 5 to 9 mph in the morning.

    High: 86 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 72. South wind around 6 mph becoming calm in the evening.

    Low: 72 °F

    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Southwest wind 3 to 8 mph.

    High: 88 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers between 8pm and 2am. Mostly cloudy, with a low around 73. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Saturday Night

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

    Low: 71 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 79. Southwest wind around 7 mph.
Tonight
Increasing clouds, with a low around 70. Light south wind.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 86. Heat index values as high as 97. Light south wind becoming southwest 5 to 9 mph in the morning.
Thursday Night
Mostly clear, with a low around 72. South wind around 6 mph becoming calm in the evening.
Friday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Southwest wind 3 to 8 mph.
Friday Night
A chance of showers between 8pm and 2am. Mostly cloudy, with a low around 73. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 86.
Saturday Night
Partly cloudy, with a low around 71.
Sunday
Sunny, with a high near 86.
Sunday Night
Mostly clear, with a low around 66.
Monday
Sunny, with a high near 86.
Monday Night
Partly cloudy, with a low around 68.
Tuesday
A 40 percent chance of showers. Mostly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ledyard CT
 41.45°N 72.03°W (Elev. 184 ft)
Last Update:
2:06 pm EDT Aug 5, 2026
Forecast Valid:
2pm EDT Aug 5, 2026-6pm EDT Aug 11, 2026
 
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