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.

Overcast

63°F

17°C

Humidity 93%
Wind Speed E 6 mph
Barometer 30.09 in (1019.0 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 16 Jun 11:56 pm EDT
Extended Forecast for

Groton CT

  • Overnight

    Overnight: A chance of showers before 2am, then a chance of drizzle or light rain after 2am. Patchy fog after 2am. Otherwise, cloudy, with a low around 60. East wind around 8 mph. Chance of precipitation is 50%.

    Low: 60 °F

    Chance
    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: A 40 percent chance of showers, mainly after 8am. Patchy fog before noon. Otherwise, cloudy, with a high near 66. East wind around 8 mph.

    High: 66 °F

    Chance
    Showers and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers. Patchy fog. Otherwise, cloudy, with a low around 62. South wind around 5 mph.

    Low: 62 °F

    Chance
    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: A slight chance of showers, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 71. South wind 3 to 8 mph. Chance of precipitation is 20%.

    High: 71 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers. Mostly cloudy, with a low around 65. Southwest wind around 6 mph. Chance of precipitation is 30%.

    Low: 65 °F

    Chance
    T-storms

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

Detailed Forecast

Overnight
A chance of showers before 2am, then a chance of drizzle or light rain after 2am. Patchy fog after 2am. Otherwise, cloudy, with a low around 60. East wind around 8 mph. Chance of precipitation is 50%.
Tuesday
A 40 percent chance of showers, mainly after 8am. Patchy fog before noon. Otherwise, cloudy, with a high near 66. East wind around 8 mph.
Tuesday Night
A 50 percent chance of showers. Patchy fog. Otherwise, cloudy, with a low around 62. South wind around 5 mph.
Wednesday
A slight chance of showers, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 71. South wind 3 to 8 mph. Chance of precipitation is 20%.
Wednesday Night
A chance of showers and thunderstorms before 2am, then a slight chance of showers. Mostly cloudy, with a low around 65. Southwest wind around 6 mph. Chance of precipitation is 30%.
Juneteenth
Mostly sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 65.
Friday
Sunny, with a high near 76.
Friday Night
Mostly clear, with a low around 62.
Saturday
Sunny, with a high near 75.
Saturday Night
Mostly cloudy, with a low around 64.
Sunday
Partly sunny, with a high near 76.
Sunday Night
Partly cloudy, with a low around 66.
Monday
Mostly sunny, with a high near 78.
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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:
11:55 pm EDT Jun 16, 2025
Forecast Valid:
12am EDT Jun 17, 2025-6pm EDT Jun 23, 2025
 
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