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

64°F

18°C

Humidity 96%
Wind Speed Calm
Barometer 30.07 in (1018.3 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 26 Aug 11:56 pm EDT
Extended Forecast for

Mystic CT

  • Overnight

    Overnight: Mostly cloudy, with a low around 65. Light southwest wind.

    Low: 65 °F

    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of showers between 2pm and 5pm. Mostly cloudy, then gradually becoming sunny, with a high near 78. South wind 5 to 11 mph. Chance of precipitation is 20%.

    High: 78 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 5am, then a chance of showers. Mostly cloudy, with a low around 68. South wind around 6 mph becoming calm after midnight. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Showers
    Likely

  • Friday

    Friday: A slight chance of showers, then a chance of showers and thunderstorms after 11am. Partly sunny, with a high near 80. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 30%.

    High: 80 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 62. Calm wind becoming north around 5 mph after midnight.

    Low: 62 °F

    Chance
    Showers then
    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 65. Light southwest wind.
Thursday
A slight chance of showers between 2pm and 5pm. Mostly cloudy, then gradually becoming sunny, with a high near 78. South wind 5 to 11 mph. Chance of precipitation is 20%.
Thursday Night
Showers and thunderstorms likely before 5am, then a chance of showers. Mostly cloudy, with a low around 68. South wind around 6 mph becoming calm after midnight. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 11am. Partly sunny, with a high near 80. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 30%.
Friday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 62. Calm wind becoming north around 5 mph after midnight.
Saturday
Sunny, with a high near 77.
Saturday Night
Mostly clear, with a low around 62.
Sunday
Sunny, with a high near 78.
Sunday Night
Partly cloudy, with a low around 67.
Monday
Mostly sunny, with a high near 79.
Monday Night
Partly cloudy, with a low around 66.
Tuesday
Partly sunny, with a high near 78.
Tuesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 66.
Wednesday
A 30 percent chance of showers. Partly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mystic CT
 41.35°N 71.96°W (Elev. 0 ft)
Last Update:
2:53 pm EDT Aug 26, 2026
Forecast Valid:
12am EDT Aug 27, 2026-6pm EDT Sep 2, 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