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.

Fog

62°F

17°C

Humidity 100%
Wind Speed E 10 mph
Barometer 30.02 in (1016.6 mb)
Dewpoint 62°F (17°C)
Visibility 0.50 mi
Last update 17 Jun 6:56 pm EDT
Extended Forecast for

Old Mystic CT

  • Tonight

    Tonight: A slight chance of showers, then a chance of showers and thunderstorms after 2am. Patchy fog. Otherwise, cloudy, with a low around 64. Southeast wind around 6 mph. Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 11am, then a chance of showers and thunderstorms after 11am. Cloudy, with a high near 73. South wind 5 to 7 mph. Chance of precipitation is 30%.

    High: 73 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms before 2am. Cloudy, with a low around 65. South wind around 5 mph.

    Low: 65 °F

    Chance
    T-storms

  • Juneteenth

    Juneteenth: A 20 percent chance of showers and thunderstorms after 2pm. Mostly cloudy, then gradually becoming sunny, with a high near 84. Southwest wind 6 to 11 mph, with gusts as high as 23 mph.

    High: 84 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms, mainly between 8pm and 2am. Mostly cloudy, with a low around 64. West wind 7 to 9 mph, with gusts as high as 21 mph.

    Low: 64 °F

    Chance
    Showers

  • Friday

    Friday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 65.

    Low: 65 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A slight chance of showers, then a chance of showers and thunderstorms after 2am. Patchy fog. Otherwise, cloudy, with a low around 64. Southeast wind around 6 mph. Chance of precipitation is 30%.
Wednesday
A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 11am, then a chance of showers and thunderstorms after 11am. Cloudy, with a high near 73. South wind 5 to 7 mph. Chance of precipitation is 30%.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 2am. Cloudy, with a low around 65. South wind around 5 mph.
Juneteenth
A 20 percent chance of showers and thunderstorms after 2pm. Mostly cloudy, then gradually becoming sunny, with a high near 84. Southwest wind 6 to 11 mph, with gusts as high as 23 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly between 8pm and 2am. Mostly cloudy, with a low around 64. West wind 7 to 9 mph, with gusts as high as 21 mph.
Friday
Sunny, with a high near 81.
Friday Night
Mostly clear, with a low around 61.
Saturday
Mostly sunny, with a high near 82.
Saturday Night
Mostly cloudy, with a low around 65.
Sunday
Mostly sunny, with a high near 85.
Sunday Night
Partly cloudy, with a low around 68.
Monday
Mostly sunny, with a high near 88.
Monday Night
Mostly clear, with a low around 69.
Tuesday
Mostly sunny, with a high near 91.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Old Mystic CT
 41.37°N 71.96°W (Elev. 43 ft)
Last Update:
3:10 pm EDT Jun 17, 2025
Forecast Valid:
7pm EDT Jun 17, 2025-6pm EDT Jun 24, 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