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.

Fog/Mist

62°F

17°C

Humidity 100%
Wind Speed E 9 mph
Barometer 30.08 in (1018.6 mb)
Dewpoint 62°F (17°C)
Visibility 2.00 mi
Last update 17 Jun 6:56 am EDT
Extended Forecast for

Old Mystic CT

  • Today

    Today: A 40 percent chance of showers, mainly before 2pm. Patchy fog before 8am. Otherwise, cloudy, with a high near 67. East wind 5 to 7 mph.

    High: 67 °F

    Chance
    Showers and
    Patchy Fog

  • Tonight

    Tonight: A 30 percent chance of showers, mainly after 2am. Patchy fog. Otherwise, cloudy, with a low around 61. Light southeast wind.

    Low: 61 °F

    Chance
    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: A chance of showers before 11am, then a slight chance of showers and thunderstorms after 5pm. Cloudy, with a high near 74. South wind 3 to 7 mph. Chance of precipitation is 30%.

    High: 74 °F

    Chance
    Showers then
    Cloudy

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms between 8pm and 11pm, then a slight chance of showers. Mostly cloudy, with a low around 64. Light southwest wind. Chance of precipitation is 40%.

    Low: 64 °F

    Chance
    Showers

  • Juneteenth

    Juneteenth: A 20 percent chance of showers and thunderstorms after 2pm. Mostly cloudy, then gradually becoming sunny, with a high near 83. Southwest wind 6 to 13 mph.

    High: 83 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers between 8pm and 11pm. Partly cloudy, with a low around 65. Chance of precipitation is 30%.

    Low: 65 °F

    Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Friday Night

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

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

Detailed Forecast

Today
A 40 percent chance of showers, mainly before 2pm. Patchy fog before 8am. Otherwise, cloudy, with a high near 67. East wind 5 to 7 mph.
Tonight
A 30 percent chance of showers, mainly after 2am. Patchy fog. Otherwise, cloudy, with a low around 61. Light southeast wind.
Wednesday
A chance of showers before 11am, then a slight chance of showers and thunderstorms after 5pm. Cloudy, with a high near 74. South wind 3 to 7 mph. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms between 8pm and 11pm, then a slight chance of showers. Mostly cloudy, with a low around 64. Light southwest wind. Chance of precipitation is 40%.
Juneteenth
A 20 percent chance of showers and thunderstorms after 2pm. Mostly cloudy, then gradually becoming sunny, with a high near 83. Southwest wind 6 to 13 mph.
Thursday Night
A chance of showers between 8pm and 11pm. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
Friday
Sunny, with a high near 82.
Friday Night
Mostly clear, with a low around 62.
Saturday
Mostly sunny, with a high near 82.
Saturday Night
Mostly cloudy, with a low around 64.
Sunday
Mostly sunny, with a high near 84.
Sunday Night
Partly cloudy, with a low around 67.
Monday
Mostly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Old Mystic CT
 41.37°N 71.96°W (Elev. 43 ft)
Last Update:
3:36 am EDT Jun 17, 2025
Forecast Valid:
7am 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