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

73°F

23°C

Humidity 100%
Wind Speed S 3 mph
Barometer 29.97 in (1014.7 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Last update 16 Jul 9:56 pm EDT
Extended Forecast for

Groton CTSimilar City Names

Heat Advisory July 16, 11:57pm until July 17, 10:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 16, 11:57pm until July 17, 10:00pm

    NOW until 10:00pm Thu

    Heat Advisory

  • Tonight

    Low: 73 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms, mainly after 8am. Mostly cloudy, with a high near 81. Southwest wind 8 to 13 mph.

    High: 81 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 71. West wind 8 to 11 mph.

    Low: 71 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 82. Northwest wind 10 to 13 mph.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 65. North wind around 6 mph.

    Low: 65 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 8am. Mostly cloudy, with a high near 75. Chance of precipitation is 50%.

    High: 75 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms after 2am. Patchy fog. Otherwise, mostly cloudy, with a low around 73. South wind around 6 mph.
Thursday
A 50 percent chance of showers and thunderstorms, mainly after 8am. Mostly cloudy, with a high near 81. Southwest wind 8 to 13 mph.
Thursday Night
Partly cloudy, with a low around 71. West wind 8 to 11 mph.
Friday
Sunny, with a high near 82. Northwest wind 10 to 13 mph.
Friday Night
Partly cloudy, with a low around 65. North wind around 6 mph.
Saturday
Mostly sunny, with a high near 75.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 68.
Sunday
A chance of showers, with thunderstorms also possible after 8am. Mostly cloudy, with a high near 75. Chance of precipitation is 50%.
Sunday Night
Partly cloudy, with a low around 67.
Monday
Mostly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 67.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
Mostly cloudy, with a low around 68.
Wednesday
Partly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Groton CTSimilar City Names
 41.32°N 72.09°W (Elev. 3 ft)
Last Update:
2:07 pm EDT Jul 16, 2025
Forecast Valid:
11pm EDT Jul 16, 2025-6pm EDT Jul 23, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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