National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Groton / New London, Groton / New London Airport (KGON)

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Fog/Mist

36°F

2°C

Humidity 89%
Wind Speed W 7 mph
Barometer 30.09 in (1018.8 mb)
Dewpoint 33°F (1°C)
Visibility 5.00 mi
Wind Chill30°F (-1°C)
Last update 17 Feb 4:56 pm EST
Extended Forecast for

Mystic CT

Dense Fog Advisory February 17, 10:00pm until February 18, 10:00am
Click here for hazard details and duration
Dense Fog Advisory

  • Tonight

    Tonight: Areas of dense fog between 10pm and 1am. Widespread dense freezing fog after 1am. Otherwise, mostly cloudy, with a low around 31. Calm wind.

    Low: 31 °F

    Dense
    Freezing Fog
    and Areas
    Dense Fog

  • Wednesday

    Wednesday: A chance of drizzle before 10am, then rain, mainly after 10am. The drizzle could be heavy at times. Areas of dense fog before 10am. High near 40. Light and variable wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 40 °F

    Rain and
    Areas Dense
    Fog

  • Wednesday Night

    Wednesday Night: Rain and snow before 1am, then a slight chance of snow between 1am and 4am. Low around 30. Calm wind becoming northeast around 5 mph after midnight. Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 30 °F

    Rain/Snow
    then Chance
    Rain/Snow

  • Thursday

    Thursday: Partly sunny, with a high near 39. East wind around 6 mph becoming light and variable in the afternoon.

    High: 39 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 28. Light east wind.

    Low: 28 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Friday

    Friday: Rain, mainly after 1pm. High near 40. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 40 °F

    Chance Rain
    then Rain

  • Friday Night

    Friday Night: Rain likely, mainly before 1am. Mostly cloudy, with a low around 31. Chance of precipitation is 70%.

    Low: 31 °F

    Rain Likely

  • Saturday

    Saturday: Mostly cloudy, with a high near 42.

    High: 42 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Areas of dense fog between 10pm and 1am. Widespread dense freezing fog after 1am. Otherwise, mostly cloudy, with a low around 31. Calm wind.
Wednesday
A chance of drizzle before 10am, then rain, mainly after 10am. The drizzle could be heavy at times. Areas of dense fog before 10am. High near 40. Light and variable wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain and snow before 1am, then a slight chance of snow between 1am and 4am. Low around 30. Calm wind becoming northeast around 5 mph after midnight. Chance of precipitation is 80%. Little or no snow accumulation expected.
Thursday
Partly sunny, with a high near 39. East wind around 6 mph becoming light and variable in the afternoon.
Thursday Night
A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 28. Light east wind.
Friday
Rain, mainly after 1pm. High near 40. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
Rain likely, mainly before 1am. Mostly cloudy, with a low around 31. Chance of precipitation is 70%.
Saturday
Mostly cloudy, with a high near 42.
Saturday Night
Mostly cloudy, with a low around 28.
Sunday
A 50 percent chance of snow. Mostly cloudy, with a high near 37.
Sunday Night
Snow likely. Mostly cloudy, with a low around 27. Chance of precipitation is 60%.
Monday
A 40 percent chance of snow. Mostly cloudy, with a high near 36.
Monday Night
Mostly cloudy, with a low around 20.
Tuesday
Mostly sunny, with a high near 31.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mystic CT
 41.35°N 71.96°W (Elev. 0 ft)
Last Update:
3:29 pm EST Feb 17, 2026
Forecast Valid:
5pm EST Feb 17, 2026-6pm EST Feb 24, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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