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

Miami, Miami International Airport (KMIA)

Lat: 25.79°NLon: 80.32°WElev: 10ft.

A Few Clouds

80°F

27°C

Humidity 90%
Wind Speed Calm
Barometer 29.87 in (1011.3 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 18 Aug 3:53 am EDT
Extended Forecast for

Key Biscayne FL

  • Today

    Today: Sunny, with a high near 89. Heat index values as high as 102. East wind 3 to 7 mph.

    High: 89 °F

    Sunny

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 10pm. Partly cloudy, with a low around 82. East wind 6 to 8 mph becoming west in the evening.

    Low: 82 °F

    Chance
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: Showers and thunderstorms likely, mainly after 2pm. Sunny, with a high near 90. Heat index values as high as 103. Northeast wind around 11 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 90 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 81. Northeast wind around 10 mph becoming northwest after midnight. Chance of precipitation is 60%.

    Low: 81 °F

    T-storms
    Likely then
    Chance
    Showers

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 92. Northwest wind 10 to 13 mph.

    High: 92 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 82. West wind 11 to 13 mph.

    Low: 82 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms, mainly after 8am. Mostly sunny, with a high near 91. South wind around 11 mph.

    High: 91 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 82. West wind around 11 mph.

    Low: 82 °F

    Chance
    T-storms

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms. Sunny, with a high near 90. West wind around 9 mph becoming south in the afternoon.

    High: 90 °F

    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 89. Heat index values as high as 102. East wind 3 to 7 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 10pm. Partly cloudy, with a low around 82. East wind 6 to 8 mph becoming west in the evening.
Tuesday
Showers and thunderstorms likely, mainly after 2pm. Sunny, with a high near 90. Heat index values as high as 103. Northeast wind around 11 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 81. Northeast wind around 10 mph becoming northwest after midnight. Chance of precipitation is 60%.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 92. Northwest wind 10 to 13 mph.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 82. West wind 11 to 13 mph.
Thursday
A 50 percent chance of showers and thunderstorms, mainly after 8am. Mostly sunny, with a high near 91. South wind around 11 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 82. West wind around 11 mph.
Friday
A 50 percent chance of showers and thunderstorms. Sunny, with a high near 90. West wind around 9 mph becoming south in the afternoon.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 81.
Saturday
A 40 percent chance of showers and thunderstorms. Sunny, with a high near 89.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 82.
Sunday
A 40 percent chance of showers and thunderstorms. Sunny, with a high near 89.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Key Biscayne FL
 25.69°N 80.17°W
Last Update:
4:07 am EDT Aug 18, 2025
Forecast Valid:
4am EDT Aug 18, 2025-6pm EDT Aug 24, 2025
 
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Additional Resources

Radar & Satellite Image

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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