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.

A Few Clouds

81°F

27°C

Humidity 74%
Wind Speed E 10 mph
Barometer 30.04 in (1017.1 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 21 May 10:53 pm EDT
Extended Forecast for

Key Biscayne FL

  • Tonight

    Tonight: Partly cloudy, with a low around 82. Breezy, with an east wind 15 to 17 mph.

    Low: 82 °F

    Partly Cloudy
    and Breezy

  • Friday

    Friday: Mostly sunny, with a high near 85. East wind around 14 mph.

    High: 85 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 82. Breezy, with an east wind around 17 mph.

    Low: 82 °F

    Partly Cloudy
    and Breezy

  • Saturday

    Saturday: A slight chance of showers, with thunderstorms also possible after 11am. Mostly sunny, with a high near 85. East wind around 15 mph. Chance of precipitation is 20%.

    High: 85 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Breezy, with an east wind around 18 mph. Chance of precipitation is 40%.

    Low: 82 °F

    Chance
    Showers and
    Breezy

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85. Breezy, with an east wind around 17 mph, with gusts as high as 21 mph.

    High: 85 °F

    Chance
    T-storms and
    Breezy

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 82. Windy, with an east wind around 21 mph.

    Low: 82 °F

    Chance
    T-storms and
    Windy

  • Memorial Day

    Memorial Day: A slight chance of showers and thunderstorms before 8am, then a slight chance of showers and thunderstorms after 2pm. Sunny, with a high near 85. Windy, with an east wind 18 to 21 mph. Chance of precipitation is 20%.

    High: 85 °F

    Slight Chance
    T-storms and
    Windy

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms, mainly after 8pm. Partly cloudy, with a low around 82. Windy, with an east wind around 21 mph.

    Low: 82 °F

    Chance
    T-storms and
    Windy

Detailed Forecast

Tonight
Partly cloudy, with a low around 82. Breezy, with an east wind 15 to 17 mph.
Friday
Mostly sunny, with a high near 85. East wind around 14 mph.
Friday Night
Partly cloudy, with a low around 82. Breezy, with an east wind around 17 mph.
Saturday
A slight chance of showers, with thunderstorms also possible after 11am. Mostly sunny, with a high near 85. East wind around 15 mph. Chance of precipitation is 20%.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Breezy, with an east wind around 18 mph. Chance of precipitation is 40%.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85. Breezy, with an east wind around 17 mph, with gusts as high as 21 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 82. Windy, with an east wind around 21 mph.
Memorial Day
A slight chance of showers and thunderstorms before 8am, then a slight chance of showers and thunderstorms after 2pm. Sunny, with a high near 85. Windy, with an east wind 18 to 21 mph. Chance of precipitation is 20%.
Monday Night
A 40 percent chance of showers and thunderstorms, mainly after 8pm. Partly cloudy, with a low around 82. Windy, with an east wind around 21 mph.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85. Windy.
Tuesday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 82. Breezy. Chance of precipitation is 60%.
Wednesday
Showers and thunderstorms likely. Partly sunny, with a high near 84. Breezy. Chance of precipitation is 60%.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 81.
Thursday
Showers and thunderstorms likely. Partly sunny, with a high near 84. Chance of precipitation is 60%.
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ABOUT THIS FORECAST

 
Point Forecast:
Key Biscayne FL
 25.69°N 80.17°W
Last Update:
4:32 pm EDT May 21, 2026
Forecast Valid:
11pm EDT May 21, 2026-6pm EDT May 28, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation