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

63°F

17°C

Humidity 60%
Wind Speed E 7 mph
Barometer 30.18 in (1021.8 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 4 Oct 2:56 pm EDT
Extended Forecast for

Old Mystic CT

  • This Afternoon

    This Afternoon: Showers likely, mainly after 5pm. Cloudy, with a steady temperature around 61. East wind around 9 mph. Chance of precipitation is 60%.

    High: 61 °F

    Showers
    Likely

  • Tonight

    Tonight: Showers likely, mainly before 10pm. Cloudy, then gradually becoming partly cloudy, with a low around 51. Northeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Showers
    Likely then
    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 67. Northwest wind 5 to 13 mph.

    High: 67 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 43. Northwest wind around 8 mph.

    Low: 43 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 59. Northwest wind around 10 mph, with gusts as high as 20 mph.

    High: 59 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 41.

    Low: 41 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

Detailed Forecast

This Afternoon
Showers likely, mainly after 5pm. Cloudy, with a steady temperature around 61. East wind around 9 mph. Chance of precipitation is 60%.
Tonight
Showers likely, mainly before 10pm. Cloudy, then gradually becoming partly cloudy, with a low around 51. Northeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Sunny, with a high near 67. Northwest wind 5 to 13 mph.
Monday Night
Clear, with a low around 43. Northwest wind around 8 mph.
Tuesday
Sunny, with a high near 59. Northwest wind around 10 mph, with gusts as high as 20 mph.
Tuesday Night
Clear, with a low around 41.
Wednesday
Sunny, with a high near 63.
Wednesday Night
Mostly clear, with a low around 54.
Thursday
Sunny, with a high near 70.
Thursday Night
Mostly clear, with a low around 51.
Friday
Sunny, with a high near 67.
Friday Night
Mostly clear, with a low around 50.
Saturday
Sunny, with a high near 64.
Saturday Night
Mostly clear, with a low around 46.
Sunday
Mostly sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Old Mystic CT
 41.37°N 71.99°W (Elev. 131 ft)
Last Update:
2:27 pm EDT Oct 4, 2026
Forecast Valid:
3pm EDT Oct 4, 2026-6pm EDT Oct 11, 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