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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

2 Miles SE South Lyme CT

Heat Advisory July 28, 11:00am until July 29, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: A chance of showers, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 79. Southwest wind 3 to 8 mph. Chance of precipitation is 50%.

    High: 79 °F

    Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 11pm. Mostly cloudy, with a low around 70. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 70 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 87. Light and variable wind becoming southwest around 5 mph in the afternoon.

    High: 87 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 70. Calm wind.

    Low: 70 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers after 8pm. Mostly cloudy, with a low around 70.

    Low: 70 °F

    Chance
    Showers

  • Thursday

    Thursday: A 50 percent chance of showers. Partly sunny, with a high near 82.

    High: 82 °F

    Chance
    Showers

Detailed Forecast

Today
A chance of showers, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 79. Southwest wind 3 to 8 mph. Chance of precipitation is 50%.
Tonight
A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 11pm. Mostly cloudy, with a low around 70. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.
Monday
Sunny, with a high near 87. Light and variable wind becoming southwest around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 70. Calm wind.
Tuesday
Sunny, with a high near 89. Calm wind becoming southwest around 6 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 72.
Wednesday
Sunny, with a high near 89.
Wednesday Night
A 50 percent chance of showers after 8pm. Mostly cloudy, with a low around 70.
Thursday
A 50 percent chance of showers. Partly sunny, with a high near 82.
Thursday Night
A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 64.
Friday
Mostly sunny, with a high near 79.
Friday Night
Mostly clear, with a low around 60.
Saturday
Sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SE South Lyme CT
 41.3°N 72.27°W (Elev. 75 ft)
Last Update:
1:56 am EDT Jul 27, 2025
Forecast Valid:
8am EDT Jul 27, 2025-6pm EDT Aug 2, 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