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

79°F

26°C

Humidity 82%
Wind Speed SE 9 mph
Barometer 29.95 in (1014.2 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 2 Aug 3:56 pm EDT
Extended Forecast for

Mystic CT

  • This Afternoon

    This Afternoon: A 20 percent chance of showers after 5pm. Mostly cloudy, with a high near 79. South wind around 9 mph.

    High: 79 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A chance of showers, then showers and possibly a thunderstorm after 11pm. Patchy fog between 8pm and 2am. Low around 70. South wind 5 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 70 °F

    Showers
    Likely and
    Patchy Fog
    then Showers
    and Patchy
    Fog

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 77. South wind around 16 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    High: 77 °F

    Showers

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 63. Southwest wind 5 to 9 mph becoming light and variable. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Showers
    Likely then
    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 80. Northwest wind 5 to 7 mph becoming southwest in the afternoon.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 68.

    Low: 68 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers after 5pm. Mostly cloudy, with a high near 79. South wind around 9 mph.
Tonight
A chance of showers, then showers and possibly a thunderstorm after 11pm. Patchy fog between 8pm and 2am. Low around 70. South wind 5 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
Showers and possibly a thunderstorm. High near 77. South wind around 16 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Monday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 63. Southwest wind 5 to 9 mph becoming light and variable. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
Sunny, with a high near 80. Northwest wind 5 to 7 mph becoming southwest in the afternoon.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
Mostly sunny, with a high near 79.
Wednesday Night
Mostly cloudy, with a low around 68.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
A 30 percent chance of showers before 2am. Partly cloudy, with a low around 71.
Friday
Mostly sunny, with a high near 81.
Friday Night
A 30 percent chance of showers. Partly cloudy, with a low around 71.
Saturday
A 30 percent chance of showers. Mostly sunny, with a high near 81.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 70.
Sunday
Mostly sunny, with a high near 81.
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:
2:30 pm EDT Aug 2, 2026
Forecast Valid:
4pm EDT Aug 2, 2026-6pm EDT Aug 9, 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