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.

Overcast

58°F

14°C

Humidity 65%
Wind Speed SE 17 mph
Barometer 30.05 in (1017.6 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 16 Oct 3:56 am EDT
Extended Forecast for

Groton CT

  • Overnight

    Overnight: A 40 percent chance of showers after 5am. Mostly cloudy, with a steady temperature around 58. Southeast wind around 16 mph.

    Low: 58 °F

    Chance
    Showers

  • Friday

    Friday: Showers, with thunderstorms also possible after 2pm. High near 68. Southwest wind around 17 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 68 °F

    Showers

  • Friday Night

    Friday Night: Showers and thunderstorms before 2am, then showers likely. Low around 48. Southwest wind 11 to 16 mph becoming northwest after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 48 °F

    Showers

  • Saturday

    Saturday: Showers likely, mainly before 8am. Cloudy through mid morning, then gradual clearing, with a high near 52. North wind around 17 mph. Chance of precipitation is 60%.

    High: 52 °F

    Showers
    Likely then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 38. North wind 10 to 13 mph.

    Low: 38 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 40 percent chance of showers after 5am. Mostly cloudy, with a steady temperature around 58. Southeast wind around 16 mph.
Friday
Showers, with thunderstorms also possible after 2pm. High near 68. Southwest wind around 17 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers and thunderstorms before 2am, then showers likely. Low around 48. Southwest wind 11 to 16 mph becoming northwest after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers likely, mainly before 8am. Cloudy through mid morning, then gradual clearing, with a high near 52. North wind around 17 mph. Chance of precipitation is 60%.
Saturday Night
Clear, with a low around 38. North wind 10 to 13 mph.
Sunday
Sunny, with a high near 55.
Sunday Night
Mostly clear, with a low around 44.
Monday
Mostly sunny, with a high near 59.
Monday Night
Partly cloudy, with a low around 45.
Tuesday
Partly sunny, with a high near 63.
Tuesday Night
Partly cloudy, with a low around 46.
Wednesday
Sunny, with a high near 62.
Wednesday Night
Mostly clear, with a low around 44.
Thursday
Mostly sunny, with a high near 59.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Groton CT
 41.32°N 72.06°W (Elev. 3 ft)
Last Update:
3:47 am EDT Oct 16, 2026
Forecast Valid:
4am EDT Oct 16, 2026-6pm EDT Oct 22, 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