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.

Fair

57°F

14°C

Humidity 64%
Wind Speed N 14 G 18 mph
Barometer 30.19 in (1022.2 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 15 Oct 8:56 am EDT
Extended Forecast for

Old Mystic CT

  • Today

    Today: Sunny, with a high near 63. North wind 5 to 9 mph becoming light northeast in the afternoon.

    High: 63 °F

    Sunny

  • Tonight

    Tonight: A 30 percent chance of showers after 5am. Increasing clouds, with a low around 47. Calm wind becoming southeast around 6 mph after midnight.

    Low: 47 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers before 2pm, then a chance of showers and thunderstorms after 5pm. High near 69. South wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 69 °F

    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers after 8pm. Low around 43. Southwest wind 7 to 10 mph becoming northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 43 °F

    Showers

  • Saturday

    Saturday: Showers likely before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 53. North wind around 13 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    High: 53 °F

    Showers
    Likely then
    Mostly Sunny

  • Saturday Night

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

    Low: 34 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 63. North wind 5 to 9 mph becoming light northeast in the afternoon.
Tonight
A 30 percent chance of showers after 5am. Increasing clouds, with a low around 47. Calm wind becoming southeast around 6 mph after midnight.
Friday
Showers before 2pm, then a chance of showers and thunderstorms after 5pm. High near 69. South wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
A chance of showers and thunderstorms, then showers after 8pm. Low around 43. Southwest wind 7 to 10 mph becoming northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers likely before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 53. North wind around 13 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Saturday Night
Mostly clear, with a low around 34.
Sunday
Sunny, with a high near 56.
Sunday Night
Mostly clear, with a low around 39.
Monday
Sunny, with a high near 60.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 64.
Tuesday Night
Partly cloudy, with a low around 42.
Wednesday
Sunny, with a high near 63.
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ABOUT THIS FORECAST

 
Point Forecast:
Old Mystic CT
 41.37°N 71.99°W (Elev. 131 ft)
Last Update:
7:44 am EDT Oct 15, 2026
Forecast Valid:
9am EDT Oct 15, 2026-6pm EDT Oct 21, 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