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

78°F

26°C

Humidity 40%
Wind Speed SW 14 mph
Barometer 29.84 in (1010.5 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 21 Jun 3:56 pm EDT
Extended Forecast for

Groton CT

  • Tonight

    Tonight: Partly cloudy, with a low around 60. Southwest wind 5 to 8 mph becoming calm in the evening.

    Low: 60 °F

    Partly Cloudy

  • Monday

    Monday: Showers, mainly after 11am. High near 70. Calm wind becoming southeast 5 to 7 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 70 °F

    Slight Chance
    Showers then
    Showers

  • Monday Night

    Monday Night: Showers, with thunderstorms also possible after 11pm. Steady temperature around 66. Southeast wind 11 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 66 °F

    Showers

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm before 8am, then showers likely. High near 72. Southwest wind around 7 mph becoming northwest in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 72 °F

    Showers

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 61. Northwest wind 3 to 5 mph.

    Low: 61 °F

    Chance
    Showers then
    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 61.

    Low: 61 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 60. Southwest wind 5 to 8 mph becoming calm in the evening.
Monday
Showers, mainly after 11am. High near 70. Calm wind becoming southeast 5 to 7 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
Showers, with thunderstorms also possible after 11pm. Steady temperature around 66. Southeast wind 11 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday
Showers and possibly a thunderstorm before 8am, then showers likely. High near 72. Southwest wind around 7 mph becoming northwest in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 61. Northwest wind 3 to 5 mph.
Wednesday
Sunny, with a high near 75.
Wednesday Night
Clear, with a low around 61.
Thursday
Sunny, with a high near 75.
Thursday Night
Partly cloudy, with a low around 64.
Friday
A chance of showers between 8am and 2pm. Partly sunny, with a high near 74. Chance of precipitation is 30%.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 65.
Saturday
Mostly sunny, with a high near 77.
Saturday Night
Partly cloudy, with a low around 64.
Sunday
Sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Groton CT
 41.32°N 72.06°W (Elev. 3 ft)
Last Update:
2:19 pm EDT Jun 21, 2026
Forecast Valid:
4pm EDT Jun 21, 2026-6pm EDT Jun 28, 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