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.

Light Rain Fog/Mist

70°F

21°C

Humidity 93%
Wind Speed NE 9 mph
Barometer 29.84 in (1010.3 mb)
Dewpoint 68°F (20°C)
Visibility 6.00 mi
Last update 17 Aug 1:56 pm EDT
Extended Forecast for

Old Mystic CT

  • This Afternoon

    This Afternoon: Areas of drizzle before 3pm. Mostly cloudy, with a high near 72. East wind around 7 mph.

    High: 72 °F

    Areas Drizzle

  • Tonight

    Tonight: Mostly cloudy, with a low around 66. North wind 3 to 5 mph.

    Low: 66 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83. Light and variable wind becoming southwest around 6 mph in the afternoon.

    High: 83 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 64. Light and variable wind.

    Low: 64 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 84. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 84 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Thursday

    Thursday: A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before 2am. Partly cloudy, with a low around 62.

    Low: 62 °F

    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Areas of drizzle before 3pm. Mostly cloudy, with a high near 72. East wind around 7 mph.
Tonight
Mostly cloudy, with a low around 66. North wind 3 to 5 mph.
Tuesday
Mostly sunny, with a high near 83. Light and variable wind becoming southwest around 6 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 64. Light and variable wind.
Wednesday
Sunny, with a high near 84. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 67.
Thursday
A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 82.
Thursday Night
A 30 percent chance of showers before 2am. Partly cloudy, with a low around 62.
Friday
Mostly sunny, with a high near 80.
Friday Night
A 30 percent chance of showers after 2am. Partly cloudy, with a low around 61.
Saturday
A 40 percent chance of showers. Partly sunny, with a high near 77.
Saturday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 62.
Sunday
A 50 percent chance of showers. Mostly cloudy, with a high near 78.
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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:
11:37 am EDT Aug 17, 2026
Forecast Valid:
2pm EDT Aug 17, 2026-6pm EDT Aug 23, 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