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

62°F

17°C

Humidity 96%
Wind Speed SE 6 mph
Barometer 29.91 in (1012.6 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 13 Oct 6:56 pm EDT
Extended Forecast for

Old Mystic CT

  • Tonight

    Tonight: Partly cloudy, with a low around 61. Southwest wind 6 to 9 mph, with gusts as high as 22 mph.

    Low: 61 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77. West wind around 9 mph, with gusts as high as 20 mph.

    High: 77 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 50. Northwest wind around 6 mph.

    Low: 50 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 64. North wind 5 to 7 mph.

    High: 64 °F

    Sunny

  • Thursday Night

    Thursday Night: Showers likely after 2am. Increasing clouds, with a low around 49. Calm wind becoming southeast around 6 mph after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 49 °F

    Partly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Showers. High near 68. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 68 °F

    Showers

  • Friday Night

    Friday Night: A 50 percent chance of showers before 2am. Cloudy, then gradually becoming partly cloudy, with a low around 41. Breezy.

    Low: 41 °F

    Chance
    Showers and
    Breezy

  • Saturday

    Saturday: Sunny, with a high near 51. Breezy.

    High: 51 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 61. Southwest wind 6 to 9 mph, with gusts as high as 22 mph.
Wednesday
Mostly sunny, with a high near 77. West wind around 9 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 50. Northwest wind around 6 mph.
Thursday
Sunny, with a high near 64. North wind 5 to 7 mph.
Thursday Night
Showers likely after 2am. Increasing clouds, with a low around 49. Calm wind becoming southeast around 6 mph after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Showers. High near 68. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
A 50 percent chance of showers before 2am. Cloudy, then gradually becoming partly cloudy, with a low around 41. Breezy.
Saturday
Sunny, with a high near 51. Breezy.
Saturday Night
Mostly clear, with a low around 34.
Sunday
Sunny, with a high near 56.
Sunday Night
Mostly clear, with a low around 42.
Monday
Mostly sunny, with a high near 61.
Monday Night
Mostly cloudy, with a low around 48.
Tuesday
Mostly sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Old Mystic CT
 41.35°N 71.99°W (Elev. 98 ft)
Last Update:
2:19 pm EDT Oct 13, 2026
Forecast Valid:
7pm EDT Oct 13, 2026-6pm EDT Oct 20, 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