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.

Overcast

34°F

1°C

Humidity 73%
Wind Speed NW 10 mph
Barometer 29.87 in (1011.5 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill26°F (-3°C)
Last update 12 Mar 8:56 pm EDT
Extended Forecast for

Old Mystic CT

  • Tonight

    Tonight: A 30 percent chance of snow before 11pm. Mostly cloudy early, then becoming clear, with a low around 28. West wind around 8 mph, with gusts as high as 20 mph.

    Low: 28 °F

    Chance Snow
    then Clear

  • Friday

    Friday: Increasing clouds, with a high near 45. Wind chill values between 25 and 35 early. Light and variable wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 21 mph.

    High: 45 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: A 20 percent chance of rain before 2am. Mostly cloudy, then gradually becoming mostly clear, with a low around 35. South wind around 10 mph, with gusts as high as 28 mph.

    Low: 35 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: Sunny, with a high near 48. West wind 14 to 17 mph, with gusts as high as 32 mph.

    High: 48 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 28. West wind 3 to 8 mph. Winds could gust as high as 21 mph.

    Low: 28 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, with a high near 46.

    High: 46 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Rain likely after 2am. Cloudy, with a low around 36. Chance of precipitation is 70%.

    Low: 36 °F

    Mostly Cloudy
    then Rain
    Likely

  • Monday

    Monday: Rain and possibly a thunderstorm. High near 56. Chance of precipitation is 100%.

    High: 56 °F

    Rain

  • Monday Night

    Monday Night: Rain, mainly before 2am. Low around 37. Chance of precipitation is 90%.

    Low: 37 °F

    Rain

Detailed Forecast

Tonight
A 30 percent chance of snow before 11pm. Mostly cloudy early, then becoming clear, with a low around 28. West wind around 8 mph, with gusts as high as 20 mph.
Friday
Increasing clouds, with a high near 45. Wind chill values between 25 and 35 early. Light and variable wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 21 mph.
Friday Night
A 20 percent chance of rain before 2am. Mostly cloudy, then gradually becoming mostly clear, with a low around 35. South wind around 10 mph, with gusts as high as 28 mph.
Saturday
Sunny, with a high near 48. West wind 14 to 17 mph, with gusts as high as 32 mph.
Saturday Night
Increasing clouds, with a low around 28. West wind 3 to 8 mph. Winds could gust as high as 21 mph.
Sunday
Mostly cloudy, with a high near 46.
Sunday Night
Rain likely after 2am. Cloudy, with a low around 36. Chance of precipitation is 70%.
Monday
Rain and possibly a thunderstorm. High near 56. Chance of precipitation is 100%.
Monday Night
Rain, mainly before 2am. Low around 37. Chance of precipitation is 90%.
Tuesday
A 30 percent chance of rain before 8am. Partly sunny, with a high near 45.
Tuesday Night
Partly cloudy, with a low around 23.
Wednesday
Sunny, with a high near 37.
Wednesday Night
Partly cloudy, with a low around 24.
Thursday
Mostly sunny, with a high near 42.
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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:
6:03 pm EDT Mar 12, 2026
Forecast Valid:
9pm EDT Mar 12, 2026-6pm EDT Mar 19, 2026
 
Forecast Discussion
 
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Additional Resources

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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