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.

Fog/Mist

75°F

24°C

Humidity 96%
Wind Speed Calm
Barometer 30.10 in (1019.1 mb)
Dewpoint 74°F (23°C)
Visibility 6.00 mi
Last update 7 Aug 6:56 am EDT
Extended Forecast for

New London CT

Heat Advisory August 7, 07:56am until August 7, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 7, 07:56am until August 7, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Today

    High: 90 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly between 11pm and 5am. Patchy fog after 2am. Otherwise, increasing clouds, with a low around 74. Light southwest wind.

    Low: 74 °F

    Chance
    Showers and
    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 89. Heat index values as high as 98. Southwest wind 5 to 9 mph.

    High: 89 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Partly cloudy, with a low around 74. Southwest wind 3 to 5 mph. Chance of precipitation is 20%.

    Low: 74 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 89. West wind 5 to 9 mph.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 68.

    Low: 68 °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 73.

    Low: 73 °F

    Partly Cloudy

Detailed Forecast

Today
Patchy fog before 8am. Otherwise, sunny, with a high near 90. Heat index values as high as 100. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Tonight
A 40 percent chance of showers and thunderstorms, mainly between 11pm and 5am. Patchy fog after 2am. Otherwise, increasing clouds, with a low around 74. Light southwest wind.
Saturday
Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 89. Heat index values as high as 98. Southwest wind 5 to 9 mph.
Saturday Night
A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Partly cloudy, with a low around 74. Southwest wind 3 to 5 mph. Chance of precipitation is 20%.
Sunday
Sunny, with a high near 89. West wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 68.
Monday
Sunny, with a high near 87.
Monday Night
Partly cloudy, with a low around 73.
Tuesday
A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 88.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 69.
Wednesday
A 30 percent chance of showers. Partly sunny, with a high near 84.
Wednesday Night
A 30 percent chance of showers. Partly cloudy, with a low around 67.
Thursday
Mostly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
New London CT
 41.35°N 72.11°W (Elev. 98 ft)
Last Update:
2:51 am EDT Aug 7, 2026
Forecast Valid:
7am EDT Aug 7, 2026-6pm EDT Aug 13, 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