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.

Mostly Cloudy

50°F

10°C

Humidity 46%
Wind Speed NW 7 mph
Barometer 30.09 in (1018.9 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 12 May 3:56 am EDT
Extended Forecast for

Old Mystic CT

  • Today

    Today: Sunny, with a high near 64. North wind 5 to 8 mph becoming west in the afternoon.

    High: 64 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 47. Light southwest wind.

    Low: 47 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 61. South wind 5 to 14 mph, with gusts as high as 25 mph.

    High: 61 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 51. South wind 7 to 9 mph, with gusts as high as 22 mph.

    Low: 51 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers, with thunderstorms also possible after 2pm. High near 63. Southeast wind 7 to 9 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 63 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely, mainly before 2am. Mostly cloudy, with a low around 49. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 49 °F

    Showers
    Likely

  • Friday

    Friday: Showers likely, mainly between 8am and 2pm. Mostly cloudy, with a high near 64. Chance of precipitation is 60%.

    High: 64 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 30 percent chance of showers before 8pm. Mostly cloudy, with a low around 50.

    Low: 50 °F

    Chance
    Showers then
    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 64. North wind 5 to 8 mph becoming west in the afternoon.
Tonight
Increasing clouds, with a low around 47. Light southwest wind.
Wednesday
Mostly cloudy, with a high near 61. South wind 5 to 14 mph, with gusts as high as 25 mph.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 51. South wind 7 to 9 mph, with gusts as high as 22 mph.
Thursday
Showers, with thunderstorms also possible after 2pm. High near 63. Southeast wind 7 to 9 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 49. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Showers likely, mainly between 8am and 2pm. Mostly cloudy, with a high near 64. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of showers before 8pm. Mostly cloudy, with a low around 50.
Saturday
Sunny, with a high near 72.
Saturday Night
Mostly clear, with a low around 54.
Sunday
Sunny, with a high near 79.
Sunday Night
Mostly clear, with a low around 54.
Monday
Mostly sunny, with a high near 76.
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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:
2:35 am EDT May 12, 2026
Forecast Valid:
4am EDT May 12, 2026-6pm EDT May 18, 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