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

54°F

12°C

Humidity 97%
Wind Speed N 6 mph
Barometer 30.23 in (1023.7 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 19 Aug 4:56 am EDT
Extended Forecast for

Old Mystic CT

  • Today

    Today: Mostly sunny, with a high near 74. Light and variable wind becoming east 5 to 8 mph in the morning.

    High: 74 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 58. Southeast wind around 5 mph becoming calm in the evening.

    Low: 58 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers. Partly sunny, with a high near 72. East wind 5 to 10 mph.

    High: 72 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 59. East wind around 7 mph.

    Low: 59 °F

    Chance
    Showers

  • Thursday

    Thursday: A 20 percent chance of showers before 2pm. Partly sunny, with a high near 76. Northeast wind 11 to 15 mph.

    High: 76 °F

    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 74. Light and variable wind becoming east 5 to 8 mph in the morning.
Tonight
Partly cloudy, with a low around 58. Southeast wind around 5 mph becoming calm in the evening.
Wednesday
A 40 percent chance of showers. Partly sunny, with a high near 72. East wind 5 to 10 mph.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 59. East wind around 7 mph.
Thursday
A 20 percent chance of showers before 2pm. Partly sunny, with a high near 76. Northeast wind 11 to 15 mph.
Thursday Night
Partly cloudy, with a low around 58.
Friday
Mostly sunny, with a high near 78.
Friday Night
Mostly clear, with a low around 60.
Saturday
Sunny, with a high near 79.
Saturday Night
Mostly clear, with a low around 64.
Sunday
Mostly sunny, with a high near 78.
Sunday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 65.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Old Mystic CT
 41.37°N 71.96°W (Elev. 43 ft)
Last Update:
4:58 am EDT Aug 19, 2025
Forecast Valid:
5am EDT Aug 19, 2025-6pm EDT Aug 25, 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