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Key Biscayne, FL Weather

Updated: Wed May 20th 2026 4:00 PM EDT

Scattered Showers

83^°F 28^°C

Feels Like 87^°F / 31^°C

Key Biscayne, FL weather condition is Scattered Showers and 83°F.

Today's Weather in Key Biscayne,FL

The current weather in Key Biscayne FL as of 4:00 PM EDT on Wed May 20th 2026, has a sky condition of Scattered Showers with the visibility of 6 mile(s) and the UV index at 5.7. It is 83 degrees fahrenheit but feels like 87 degrees with a forecasted high of 83 and low of 80. The barometric pressure is 30.03 - measured by inches of mercury - and is steady since its last observation. The humidity is 66 percent that's steady since the last report, with a dew point of 70 degrees fahrenheit which is falling. Wind direction is from the East at 14.1 miles per hour, gusting at 16.7 miles per hour. Sunrise was at 6:32 AM and Sunset is at 8:02 PM. The moon phase is a Waxing Crescent moon rising at 10:15 AM with 15% illumination. Thank you for listening to the weather report from LocalConditions.com!

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Barometer 30.03 inHg. falling
Humidity 66% steady
Heat Index 87°F
Wind from E. 14.1 mph
Wind Gust 16.7 miles per hour
Wind Chill 83°F
UV Index 5.7

Dew Point 70°F falling
Visibility 6 mi.
Sunrise 6:32 AM
Sunset 8:02 PM
Moonrise 10:15 AM
Moonset Not Observable
Moon Phase Waxing Crescent Moon 15%

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Radar Alerts Next 48 Hours Traffic

Hourly Forecast - Next 8 hours

5 Day Forecast

Scattered Showers

Scattered Showers with a high of 83°F and a low of 81°F. Probable rainfall forecasted, having an 88% chance with an estimated 0.11in. Winds will be moderate, blowing around 17mph. The humidity will be on the higher side, reaching around 67%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 83° \| Lo 81°	67%	88% \| est. 0.11in	0%	16.6 mph

Scattered Showers

Scattered Showers with a high of 83°F and a low of 80°F. Probable rainfall forecasted, having an 87% chance with an estimated 0.01in. Winds will be moderate, blowing around 18mph. The humidity will be on the higher side, reaching around 65%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 83° \| Lo 80°	65%	87% \| est. 0.01in	0%	17.9 mph

Scattered Showers

Scattered Showers with a high of 84°F and a low of 80°F. Probable rainfall forecasted, having an 89% chance with an estimated 0.06in. Winds will be moderate, blowing around 18mph. The humidity will be on the higher side, reaching around 69%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 84° \| Lo 80°	69%	89% \| est. 0.06in	0%	17.4 mph

Scattered Showers

Scattered Showers with a high of 84°F and a low of 82°F. Probable rainfall forecasted, having an 83% chance with an estimated 0.02in. Winds will be moderate, blowing around 17mph. The humidity will be on the higher side, reaching around 71%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 84° \| Lo 82°	71%	83% \| est. 0.02in	0%	16.1 mph

Scattered Showers

Scattered Showers with a high of 84°F and a low of 82°F. Probable rainfall forecasted, having an 81% chance with an estimated 0.05in. Winds will be moderate, blowing around 19mph. The humidity will be on the higher side, reaching around 69%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 84° \| Lo 82°	69%	81% \| est. 0.05in	0%	18.8 mph

Yesterday 5-Day 10-Day

Weather Radar Map

Live Key Biscayne, FL weather with granular precipitation, radar, barometric pressure, temperatures and wind speeds for today thru Sunday, as you toggle through each map layer. Use the slider to move forward and back in time to view how current data and forecasts will affect the region; you can press or click on the map to show metrics available for each tab. The related timestamp is located above the Play button which will animate the weather forecast.

Hourly Temperature

The current temperature today is 83^°F. The morning temperature of 81°^F is lowest at 1am with the daytime high of 83°^F at 12pm and a low around 81°^F at 10pm is expected.

Hourly Barometric Pressure

The highest pressure today is 30.1^inHg at 11am and lowest being 30.01^inHg at 5pm.

Hourly Wind Speeds

The fastest wind is reported to be 17.4^mph at 12am, while the slowest is 13.9^mph around 11am; expect wind gusts peaking 23.8^mph at 1am.

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Current National Weather

Southern Plains Face Severe Weather and Flash Floods - 05-20 to 05-22

Updated Wed May 20th 2026, 6:46am PDT

A strong weather system will stir up trouble in the Southern Plains and Arklatex, bringing severe thunderstorms and potential flash flooding today and Thursday. El Paso, TX and Dallas, TX will see intense storms today, moving toward Little Rock, AR and Shreveport, LA by Thursday. Heavy rain is expected due to a stalled front and moisture from the Gulf, which could lead to flash floods. Thunderstorms will spread northeast by Friday morning.

Northern Rockies and High Plains: Rain and Snow

For those in the Northern Rockies and High Plains, rain and high-elevation snow will begin later today, continuing through Thursday. Cities like Billings, MT and Denver, CO might see rain, while the higher areas may receive snow. This weather is due to a cold air mass interacting with a southern system.

East Coast: Heat Followed by a Cool Down

The East Coast, including New York, NY and Boston, MA, will experience one more day of record heat before a cold front cools things off starting Thursday. Expect temperatures to drop and showers to bring relief to these areas, which are experiencing drought conditions.

Southeast and West Coast: Heat Lingers

The Southeast will stay hot and humid, especially in Orlando, FL, while the cold front stalls in North Carolina. On the West Coast, cities like Sacramento, CA will remain dry and warm, with temperatures reaching the upper 90s by Thursday.

This weather report is valid for ZIP code 33149, accurately covering the area of Key Biscayne, FL.