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

58°F

14°C

Humidity 84%
Wind Speed W 6 mph
Barometer 30.24 in (1024.0 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 9 Jun 2:56 am EDT
Extended Forecast for

Groton CT

  • Overnight

    Overnight: Clear, with a low around 56. West wind around 7 mph.

    Low: 56 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 70. Southwest wind 9 to 13 mph.

    High: 70 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 59. Southwest wind 7 to 11 mph.

    Low: 59 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 68. South wind 9 to 11 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 68 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a steady temperature around 65. Southwest wind 7 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers before 8am, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 78. Chance of precipitation is 40%.

    High: 78 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 63. Chance of precipitation is 30%.

    Low: 63 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: Partly sunny, with a high near 74.

    High: 74 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 62.

    Low: 62 °F

    Chance
    Showers

Detailed Forecast

Overnight
Clear, with a low around 56. West wind around 7 mph.
Tuesday
Sunny, with a high near 70. Southwest wind 9 to 13 mph.
Tuesday Night
Partly cloudy, with a low around 59. Southwest wind 7 to 11 mph.
Wednesday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 68. South wind 9 to 11 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a steady temperature around 65. Southwest wind 7 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A chance of showers before 8am, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 78. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 63. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 74.
Friday Night
A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 62.
Saturday
Mostly sunny, with a high near 73.
Saturday Night
Partly cloudy, with a low around 62.
Sunday
Mostly sunny, with a high near 73.
Sunday Night
A 30 percent chance of showers. Partly cloudy, with a low around 61.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Groton CT
 41.32°N 72.09°W (Elev. 3 ft)
Last Update:
2:07 pm EDT Jun 8, 2026
Forecast Valid:
3am EDT Jun 9, 2026-6pm EDT Jun 15, 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