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.

Overcast

74°F

23°C

Humidity 94%
Wind Speed W 7 mph
Barometer 30.00 in (1015.9 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 8 Aug 2:56 am EDT
Extended Forecast for

East Lyme CT

Heat Advisory August 8, 03:36am until August 8, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 8, 03:36am until August 8, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Overnight

    Low: 72 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog between 8am and 9am. Otherwise, mostly sunny, with a high near 89. Heat index values as high as 98. Light west wind becoming southwest 5 to 9 mph in the morning.

    High: 89 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 11pm. Partly cloudy, with a low around 72. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 72 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 90. Heat index values as high as 96. West wind 3 to 8 mph.

    High: 90 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 66. Calm wind.

    Low: 66 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Monday Night

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

    Low: 71 °F

    Partly Cloudy

  • Tuesday

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

    High: 88 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

Overnight
Patchy fog before 5am. Otherwise, mostly cloudy, with a low around 72. Calm wind.
Saturday
Patchy fog between 8am and 9am. Otherwise, mostly sunny, with a high near 89. Heat index values as high as 98. Light west wind becoming southwest 5 to 9 mph in the morning.
Saturday Night
A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 11pm. Partly cloudy, with a low around 72. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 90. Heat index values as high as 96. West wind 3 to 8 mph.
Sunday Night
Mostly clear, with a low around 66. Calm wind.
Monday
Sunny, with a high near 87.
Monday Night
Partly cloudy, with a low around 71.
Tuesday
A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 88.
Tuesday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 67.
Wednesday
A 30 percent chance of showers before 2pm. Mostly sunny, with a high near 84.
Wednesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 66.
Thursday
A 30 percent chance of showers. Mostly sunny, with a high near 84.
Thursday Night
A 30 percent chance of showers. Partly cloudy, with a low around 64.
Friday
Mostly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
East Lyme CT
 41.39°N 72.25°W (Elev. 197 ft)
Last Update:
2:28 am EDT Aug 8, 2026
Forecast Valid:
3am EDT Aug 8, 2026-6pm EDT Aug 14, 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