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.

A Few Clouds

71°F

22°C

Humidity 96%
Wind Speed S 3 mph
Barometer 30.00 in (1015.7 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 2 Aug 1:56 am EDT
Extended Forecast for

Groton / New London Airport CT

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 71. South wind around 6 mph.

    Low: 71 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 80. South wind 7 to 11 mph.

    High: 80 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 11pm. Cloudy, with a low around 69. Southeast wind around 8 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 69 °F

    Showers
    Likely

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 78. Southwest wind 14 to 16 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 78 °F

    Showers

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Southwest wind 5 to 9 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A 30 percent chance of showers before 8am. Mostly sunny, with a high near 81.

    High: 81 °F

    Chance
    Showers then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 66.

    Low: 66 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 81.

    High: 81 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 69.

    Low: 69 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around 71. South wind around 6 mph.
Sunday
Mostly cloudy, with a high near 80. South wind 7 to 11 mph.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 11pm. Cloudy, with a low around 69. Southeast wind around 8 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers and possibly a thunderstorm. High near 78. Southwest wind 14 to 16 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Southwest wind 5 to 9 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
A 30 percent chance of showers before 8am. Mostly sunny, with a high near 81.
Tuesday Night
Mostly cloudy, with a low around 66.
Wednesday
Partly sunny, with a high near 81.
Wednesday Night
Mostly cloudy, with a low around 69.
Thursday
A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 84.
Thursday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 71.
Friday
Mostly sunny, with a high near 85.
Friday Night
Partly cloudy, with a low around 69.
Saturday
Mostly sunny, with a high near 84.
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Forecast Area
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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:
10:37 pm EDT Aug 1, 2026
Forecast Valid:
2am EDT Aug 2, 2026-6pm EDT Aug 8, 2026
 
Forecast Discussion
 
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Additional Resources

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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