Key Biscayne, Biscayne Bay, FL Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Tue
Jun 23 		Clouds Early/Clearing Late
Close Hourly 		-º / 80º 11% SSW 7 mph 76%
5pm Mostly Cloudy 85º 11% SSE 7 mph 74%
6pm Partly Cloudy 85º 9% SSE 7 mph 75%
7pm Partly Cloudy 84º 7% S 6 mph 74%
8pm Mostly Cloudy 85º 2% S 6 mph 72%
9pm Cloudy 84º 1% S 4 mph 72%
10pm Cloudy 84º 2% SSW 5 mph 74%
11pm Cloudy 83º 2% SSW 4 mph 74%
Wed
Jun 24 		Partly Cloudy
View Hourly 		89º / 80º 10% SE 10 mph 69%
12am Cloudy 83º 6% S 4 mph 76%
1am Mostly Cloudy 83º 8% SW 2 mph 76%
2am Mostly Cloudy 82º 8% W 2 mph 77%
3am Partly Cloudy 82º 7% W 3 mph 78%
4am Mostly Cloudy 82º 7% WNW 3 mph 79%
5am Partly Cloudy 81º 9% WSW 2 mph 80%
6am Partly Cloudy 81º 5% W 2 mph 80%
7am Partly Cloudy 81º 10% WNW 3 mph 80%
8am Partly Cloudy 82º 9% NW 3 mph 79%
9am Partly Cloudy 84º 7% WSW 4 mph 76%
10am Partly Cloudy 85º 5% SSE 4 mph 70%
11am Partly Cloudy 86º 8% E 4 mph 67%
12pm Mostly Sunny 87º 8% ESE 5 mph 65%
1pm Mostly Sunny 87º 9% SE 8 mph 65%
2pm Mostly Sunny 88º 7% SE 9 mph 63%
3pm Partly Cloudy 88º 6% SE 10 mph 64%
4pm Partly Cloudy 88º 4% SE 10 mph 64%
5pm Partly Cloudy 87º 10% SE 10 mph 64%
6pm Partly Cloudy 86º 4% SE 9 mph 67%
7pm Partly Cloudy 85º 9% SE 8 mph 67%
8pm Mostly Cloudy 85º 7% SSE 7 mph 69%
9pm Mostly Cloudy 84º 3% SE 8 mph 71%
10pm Mostly Cloudy 83º 5% SE 6 mph 72%
11pm Mostly Cloudy 83º 4% ESE 6 mph 72%
Thu
Jun 25 		AM Thunderstorms
View Hourly 		87º / 82º 42% SE 11 mph 69%
12am Mostly Cloudy 83º 15% SE 5 mph 74%
1am Mostly Cloudy 82º 24% SE 4 mph 73%
2am Partly Cloudy 82º 13% SE 4 mph 75%
3am Partly Cloudy 81º 5% SE 4 mph 77%
4am Partly Cloudy 82º 5% SSE 4 mph 76%
5am Partly Cloudy 82º 14% SSE 5 mph 77%
6am Few Showers 82º 34% SSE 6 mph 76%
7am Partly Cloudy 82º 24% SSE 7 mph 77%
8am Partly Cloudy 83º 24% SSE 7 mph 75%
9am Scattered Thunderstorms 84º 38% SSE 9 mph 73%
10am Scattered Thunderstorms 85º 42% SSE 9 mph 69%
11am Mostly Cloudy 85º 10% SE 9 mph 67%
12pm Partly Cloudy 86º 10% SE 9 mph 65%
1pm Mostly Cloudy 87º 12% SE 9 mph 63%
2pm Partly Cloudy 86º 10% SE 8 mph 66%
3pm Partly Cloudy 86º 10% SE 9 mph 65%
4pm Partly Cloudy 86º 13% SE 11 mph 67%
Fri
Jun 26 		Mostly Sunny 89º / 82º 19% ESE 11 mph 68%
Sat
Jun 27 		Mostly Sunny 89º / 82º 23% ESE 11 mph 68%
Sun
Jun 28 		Mostly Sunny 89º / 82º 18% E 11 mph 66%
Mon
Jun 29 		Partly Cloudy 90º / 81º 16% E 11 mph 63%
Tue
Jun 30 		Scattered Thunderstorms 89º / 81º 38% E 10 mph 67%

Weather Radar for Key Biscayne, Biscayne Bay, FL See Radar

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* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for Key Biscayne, Biscayne Bay, FL

This Afternoon
High : 89ºF
SSE wind around 9 kt. A slight chance of showers and thunderstorms. Bay waters a light chop.
Tonight
Low : 83ºF
SSE wind 5 to 7 kt becoming variable and less than 5 kt after midnight. A slight chance of showers and thunderstorms before 7pm. Bay waters smooth.
Wednesday
High : 88ºF
Variable winds less than 5 kt becoming SSE 5 to 8 kt in the afternoon. A slight chance of showers and thunderstorms after 2pm. Bay waters smooth becoming a light chop.
Wednesday Night
Low : 83ºF
ESE wind 6 to 8 kt becoming W in the evening. A slight chance of showers and thunderstorms before midnight, then a slight chance of showers and thunderstorms after 5am. Bay waters a light chop becoming smooth.
Thursday
High : 88ºF
SE wind 6 to 8 kt. A slight chance of showers and thunderstorms before 8am. Bay waters smooth becoming a light chop.
Thursday Night
Low : 84ºF
ESE wind around 10 kt. Mostly clear. Bay waters a light chop.
Friday
High : 89ºF
ESE wind around 10 kt. A slight chance of showers and thunderstorms after 2pm. Bay waters a light chop.
Friday Night
Low : 84ºF
E wind 10 to 12 kt. A slight chance of showers and thunderstorms. Bay waters a light chop.
Saturday
High : 88ºF
ESE wind around 9 kt. Sunny. Bay waters a light chop.

NOAA Buoy Data Near Key Biscayne, Biscayne Bay, FL See Map

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    Wind Speed Forecast for Key Biscayne, Biscayne Bay, FL

    TuesdayWednesdayThursday
    Wind Speed (MPH) 7422481084599
    9pm1am5am9am1pm5pm9pm1am5am9am1pm5pm
    MPH 7422481084599
    DIR SSESSWWSWWSWSESESESESSESSESE

    Current Weather Conditions In Key Biscayne, Biscayne Bay, FL

    As Of: 15 minutes ago

    • 85ºF
    • 95ºF
    • 7mph
    • 0º (SSE)
    • 7mph
    • Mostly Cloudy
    • 10mi
    • 30.08"
    • 74%
    • 0ºF

    The weather right now in Key Biscayne, Biscayne Bay, FL is Mostly Cloudy. The current temperature is 85°F, and the expected high and low for today, Tuesday, June 23, 2026, are -° high temperature and 80°F low temperature. The wind is currently blowing at 7 miles per hour, and coming from the South Southeast. The wind is gusting to 7 mph. With the wind and the atmosphere the temperature feels like 95° Fahrenheit. Expected precipitation is 11 percent, with current humidity at 74 percent, and air pressure at 30.08 in. Visibility is 10 nautical miles. There are 2 current weather alert(s).

    Weather Alerts
    Heat Advisory - 9:04am Tue Jun 23 2026

    ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 6 PM EDT THIS EVENING...

    WHAT: Heat index values up to 109 expected.

    WHERE: Coastal Broward County, Coastal Miami Dade County, Far
    South Miami-Dade County, Inland Broward County, Inland Miami-Dade
    County, Metro Broward County, and Metropolitan Miami Dade Counties.

    WHEN: Until 6 PM EDT this evening.

    IMPACTS: Hot temperatures and high humidity may cause heat
    illnesses.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    Drink plenty of fluids, stay in an air-conditioned room, stay out of
    the sun, and check up on relatives and neighbors.

    Take extra precautions when outside. Wear lightweight and loose
    fitting clothing. Try to limit strenuous activities to early morning
    or evening. Take action when you see symptoms of heat exhaustion and
    heat stroke.

    &&

    Air Quality Alert - 8:51am Tue Jun 23 2026

    ...AIR QUALITY ALERT IN EFFECT UNTIL 3 PM EDT WEDNESDAY...

    The Miami-Dade County Division of Environmental Resources Management
    has issued an Air Quality Alert for Fine Particulates until 3 PM EDT
    Wednesday.

    Fine Particulates concentrations within the region may approach or
    exceed unhealthy standards. For additional information on the Air
    Quality Index, please visit http://airnow.gov.