Current conditions at

Miami, Miami International Airport (KMIA)

Lat: 25.79°NLon: 80.32°WElev: 10ft.

A Few Clouds

81°F

27°C

Humidity 88%
Wind Speed W 5 mph
Barometer 30.01 in (1016.1 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 19 Aug 6:53 am EDT
Extended Forecast for

Key Biscayne FL

Heat Advisory August 19, 11:00am until August 19, 07:00pm
Click here for hazard details and duration
Heat Advisory
  • Today

    Today: A 10 percent chance of showers and thunderstorms after 4pm.  Sunny, with a high near 92. Heat index values as high as 106. Northwest wind 5 to 11 mph becoming southeast in the afternoon.

    High: 92 °F

    Sunny then
    Slight Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 8pm.  Partly cloudy, with a low around 84. Southwest wind 6 to 10 mph becoming northwest in the evening.

    Low: 84 °F

    Chance
    T-storms then
    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms, mainly after 5pm.  Mostly sunny, with a high near 90. Heat index values as high as 108. Light and variable wind becoming south 6 to 11 mph in the afternoon.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before 8pm.  Mostly cloudy, with a low around 84. South wind around 9 mph.

    Low: 84 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 90. South wind 7 to 11 mph.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 8pm.  Partly cloudy, with a low around 84. South wind 7 to 9 mph.

    Low: 84 °F

    Chance
    T-storms then
    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after 2pm.  Sunny, with a high near 90. Southeast wind 5 to 10 mph.

    High: 90 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm.  Partly cloudy, with a low around 84. South wind 7 to 10 mph.

    Low: 84 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly after 2pm.  Mostly sunny, with a high near 89. Southeast wind 5 to 10 mph.

    High: 89 °F

    Chance
    T-storms

Detailed Forecast

Today
A 10 percent chance of showers and thunderstorms after 4pm. Sunny, with a high near 92. Heat index values as high as 106. Northwest wind 5 to 11 mph becoming southeast in the afternoon.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 84. Southwest wind 6 to 10 mph becoming northwest in the evening.
Thursday
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 90. Heat index values as high as 108. Light and variable wind becoming south 6 to 11 mph in the afternoon.
Thursday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 84. South wind around 9 mph.
Friday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. South wind 7 to 11 mph.
Friday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 84. South wind 7 to 9 mph.
Saturday
A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 90. Southeast wind 5 to 10 mph.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 84. South wind 7 to 10 mph.
Sunday
A 30 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 89. Southeast wind 5 to 10 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 84.
Monday
Sunny, with a high near 89.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 84.
Tuesday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
Key Biscayne FL
 25.69°N 80.17°W
4:02 am EDT Aug 19, 2026
7am EDT Aug 19, 2026-6pm EDT Aug 25, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database