National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Miami, Miami International Airport (KMIA)

Lat: 25.79°NLon: 80.32°WElev: 10ft.

Fair

83°F

28°C

Humidity 82%
Wind Speed W 5 mph
Barometer 30.05 in (1017.5 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 18 Aug 3:53 am EDT
Extended Forecast for

Key Biscayne FL

Heat Advisory August 18, 11:00am until August 18, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Sunny, with a high near 93. Heat index values as high as 109. Northwest wind 5 to 9 mph becoming southeast in the afternoon.

    High: 93 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 83. South wind 11 to 15 mph becoming northwest in the evening.

    Low: 83 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 92. Heat index values as high as 108. Northwest wind 5 to 10 mph becoming southeast in the afternoon.

    High: 92 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 83. South wind 7 to 10 mph becoming west in the evening.

    Low: 83 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Light and variable wind becoming south 8 to 13 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, mainly before 8pm. Partly cloudy, with a low around 84. South wind around 9 mph.

    Low: 84 °F

    Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 90. South wind 5 to 13 mph.

    High: 90 °F

    Sunny then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 84. South wind 8 to 10 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 89. Southeast wind 5 to 11 mph.

    High: 89 °F

    Sunny then
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 93. Heat index values as high as 109. Northwest wind 5 to 9 mph becoming southeast in the afternoon.
Tonight
Mostly clear, with a low around 83. South wind 11 to 15 mph becoming northwest in the evening.
Wednesday
Sunny, with a high near 92. Heat index values as high as 108. Northwest wind 5 to 10 mph becoming southeast in the afternoon.
Wednesday Night
A 20 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 83. South wind 7 to 10 mph becoming west in the evening.
Thursday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Light and variable wind becoming south 8 to 13 mph in the afternoon.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 84. South wind around 9 mph.
Friday
A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 90. South wind 5 to 13 mph.
Friday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 84. South wind 8 to 10 mph.
Saturday
A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 89. Southeast wind 5 to 11 mph.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 84.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Sunday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 83.
Monday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Key Biscayne FL
 25.69°N 80.17°W
Last Update:
4:16 am EDT Aug 18, 2026
Forecast Valid:
4am EDT Aug 18, 2026-6pm EDT Aug 24, 2026
 
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