Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Plains to the Upper Midwest

A significant and dangerous heat wave will expand from the Central U.S. into the Eastern U.S and linger through much of the work week. Numerous daily record highs and warm lows are likely. Severe thunderstorms are possible from the southern Plains through the Upper Mississippi Valley. Fire weather concerns are expected to persist across the Four Corners region. Read More >

Current conditions at

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

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Fair

75°F

24°C

Humidity 100%
Wind Speed Calm
Barometer 30.06 in (1017.9 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Last update 23 Jun 6:56 am EDT
Extended Forecast for

Mystic CT

Heat Advisory June 23, 12:00pm until June 24, 08:00pm
Click here for hazard details and duration
Heat Advisory
  • Today

    Today: Sunny, with a high near 86. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 68. South wind around 5 mph becoming calm  in the evening.

    Low: 68 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 91. Heat index values as high as 97. Light west wind becoming southwest 5 to 9 mph in the morning.

    High: 91 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 74. Northwest wind 3 to 6 mph.

    Low: 74 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 88. Northwest wind 5 to 7 mph becoming south in the afternoon.

    High: 88 °F

    Sunny then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after 8pm.  Mostly cloudy, with a low around 66.

    Low: 66 °F

    Chance
    Showers

  • Thursday

    Thursday: A 30 percent chance of showers after 2pm.  Mostly cloudy, with a high near 76.

    High: 76 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers.  Mostly cloudy, with a low around 62.

    Low: 62 °F

    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers.  Mostly cloudy, with a high near 71.

    High: 71 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 86. Calm wind becoming south 5 to 7 mph in the afternoon.
Tonight
Partly cloudy, with a low around 68. South wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 91. Heat index values as high as 97. Light west wind becoming southwest 5 to 9 mph in the morning.
Tuesday Night
Mostly clear, with a low around 74. Northwest wind 3 to 6 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Northwest wind 5 to 7 mph becoming south in the afternoon.
Wednesday Night
A 30 percent chance of showers after 8pm. Mostly cloudy, with a low around 66.
Thursday
A 30 percent chance of showers after 2pm. Mostly cloudy, with a high near 76.
Thursday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 62.
Friday
A 30 percent chance of showers. Mostly cloudy, with a high near 71.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 63.
Saturday
A 40 percent chance of showers. Mostly cloudy, with a high near 73.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 63.
Sunday
Partly sunny, with a high near 78.
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ABOUT THIS FORECAST

 
Point Forecast:
Mystic CT
 41.35°N 71.96°W (Elev. 0 ft)
2:38 am EDT Jun 23, 2025
7am EDT Jun 23, 2025-6pm EDT Jun 29, 2025
 
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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