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

63°F

17°C

Humidity 65%
Wind Speed SW 10 mph
Barometer 30.23 in (1023.7 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 3 Oct 4:56 pm EDT
Extended Forecast for

Old Mystic CT

  • Tonight

    Tonight: Clear, with a low around 48. Southwest wind 5 to 8 mph.

    Low: 48 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 78. West wind around 6 mph.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 2am. Otherwise, mostly clear, with a low around 55. Calm wind.

    Low: 55 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 9am. Otherwise, sunny, with a high near 80. Calm wind becoming south around 6 mph in the afternoon.

    High: 80 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 55. Calm wind.

    Low: 55 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.

    Low: 59 °F

    Chance
    Showers then
    Showers
    Likely

Detailed Forecast

Tonight
Clear, with a low around 48. Southwest wind 5 to 8 mph.
Saturday
Sunny, with a high near 78. West wind around 6 mph.
Saturday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 55. Calm wind.
Sunday
Patchy fog before 9am. Otherwise, sunny, with a high near 80. Calm wind becoming south around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 55. Calm wind.
Monday
Sunny, with a high near 75.
Monday Night
Mostly clear, with a low around 59.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.
Wednesday
Showers likely. Mostly cloudy, with a high near 70. Chance of precipitation is 70%.
Wednesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 45.
Thursday
Sunny, with a high near 62.
Thursday Night
Mostly clear, with a low around 43.
Friday
Sunny, with a high near 64.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Old Mystic CT
 41.37°N 71.99°W (Elev. 131 ft)
Last Update:
2:14 pm EDT Oct 3, 2025
Forecast Valid:
5pm EDT Oct 3, 2025-6pm EDT Oct 10, 2025
 
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