National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Groton / New London, Groton / New London Airport (KGON)

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Fair

72°F

22°C

Humidity 61%
Wind Speed SE 10 mph
Barometer 30.03 in (1017.0 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 25 Jul 5:56 pm EDT
Extended Forecast for

Groton / New London Airport CT

  • Tonight

    Tonight: Mostly clear, with a low around 57. Southeast wind 5 to 8 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 79. Northeast wind 5 to 11 mph becoming southeast in the afternoon.

    High: 79 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 57. East wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 78. Calm wind becoming south 5 to 9 mph in the afternoon.

    High: 78 °F

    Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers after 2am. Partly cloudy, with a low around 64. South wind around 6 mph.

    Low: 64 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: Showers likely, mainly after 2pm. Partly sunny, with a high near 76. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    High: 76 °F

    Chance
    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely before 8pm, then showers and possibly a thunderstorm between 8pm and 2am, then showers after 2am. Low around 65. Chance of precipitation is 80%.

    Low: 65 °F

    Showers

  • Wednesday

    Wednesday: Showers likely. Mostly cloudy, with a high near 78. Chance of precipitation is 60%.

    High: 78 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers before 2am. Mostly cloudy, with a low around 64.

    Low: 64 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 57. Southeast wind 5 to 8 mph becoming calm in the evening.
Sunday
Sunny, with a high near 79. Northeast wind 5 to 11 mph becoming southeast in the afternoon.
Sunday Night
Mostly clear, with a low around 57. East wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 78. Calm wind becoming south 5 to 9 mph in the afternoon.
Monday Night
A 20 percent chance of showers after 2am. Partly cloudy, with a low around 64. South wind around 6 mph.
Tuesday
Showers likely, mainly after 2pm. Partly sunny, with a high near 76. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Showers likely before 8pm, then showers and possibly a thunderstorm between 8pm and 2am, then showers after 2am. Low around 65. Chance of precipitation is 80%.
Wednesday
Showers likely. Mostly cloudy, with a high near 78. Chance of precipitation is 60%.
Wednesday Night
A 40 percent chance of showers before 2am. Mostly cloudy, with a low around 64.
Thursday
A 30 percent chance of showers after 2pm. Partly sunny, with a high near 81.
Thursday Night
A 30 percent chance of showers. Partly cloudy, with a low around 64.
Friday
Mostly sunny, with a high near 83.
Friday Night
Mostly clear, with a low around 66.
Saturday
Mostly sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
Groton / New London Airport CT
 41.34°N 72.05°W (Elev. 49 ft)
Last Update:
2:21 pm EDT Jul 25, 2026
Forecast Valid:
6pm EDT Jul 25, 2026-6pm EDT Aug 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation