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.

Overcast

69°F

21°C

Humidity 90%
Wind Speed N 5 mph
Barometer 30.03 in (1016.9 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 22 Aug 12:56 pm EDT
Extended Forecast for

Mystic CT

  • This Afternoon

    This Afternoon: A 20 percent chance of showers after 2pm. Cloudy, with a high near 73. East wind 3 to 5 mph.

    High: 73 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A chance of showers, then showers likely and possibly a thunderstorm after 2am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 62. Light northeast wind. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Chance
    Showers then
    Showers
    Likely and
    Patchy Fog

  • Sunday

    Sunday: Showers likely, with thunderstorms also possible after 2pm. Patchy fog before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 78. East wind 5 to 8 mph becoming south in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Showers
    Likely and
    Patchy Fog
    then Chance
    Showers

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Southwest wind 3 to 7 mph.

    Low: 64 °F

    Slight Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 77. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 77 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

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

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Tuesday Night

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

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers after 2pm. Cloudy, with a high near 73. East wind 3 to 5 mph.
Tonight
A chance of showers, then showers likely and possibly a thunderstorm after 2am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 62. Light northeast wind. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers likely, with thunderstorms also possible after 2pm. Patchy fog before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 78. East wind 5 to 8 mph becoming south in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Southwest wind 3 to 7 mph.
Monday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 77. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Monday Night
Mostly clear, with a low around 59.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 59.
Wednesday
Sunny, with a high near 76.
Wednesday Night
Partly cloudy, with a low around 63.
Thursday
Mostly sunny, with a high near 76.
Thursday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 65.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mystic CT
 41.35°N 71.96°W (Elev. 0 ft)
Last Update:
3:42 am EDT Aug 22, 2026
Forecast Valid:
1pm EDT Aug 22, 2026-6pm EDT Aug 28, 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