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Over 250 million face dangerous heat dome into 4th of July weekend. Click for details. Chevron right
4th of July forecast: Where will storms disrupt outdoor plans? Chevron right

Key Biscayne, FL

86°F
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Key Biscayne

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86°
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Key Biscayne, FL Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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3 PM

86°
RealFeel® 103°
Very Hot
RealFeel Guide
Very Hot
101° to 107°
Caution advised. Danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 19%
Chevron down
Mostly sunny

RealFeel Shade™95°

Heat Index99°

WindE 8 mph

Air QualityFair

Max UV Index8.1 (Very High)

Wind Gusts13 mph

Humidity75%

Indoor Humidity75% (Dangerously Humid)

Dew Point78° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover29%

Visibility10 mi

Cloud Ceiling31300 ft

4 PM

86°
RealFeel® 100°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 24%
Chevron down
Mostly sunny

RealFeel Shade™93°

Heat Index96°

WindE 8 mph

Air QualityFair

Max UV Index4.9 (Moderate)

Wind Gusts13 mph

Humidity74%

Indoor Humidity74% (Extremely Humid)

Dew Point77° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling29900 ft

5 PM

85°
RealFeel® 96°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 43%
Chevron down
Mostly sunny

RealFeel Shade™92°

Heat Index94°

WindENE 8 mph

Air QualityFair

Max UV Index3.2 (Moderate)

Wind Gusts13 mph

Humidity72%

Indoor Humidity72% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling29900 ft

6 PM

85°
RealFeel® 94°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 47%
Chevron down
Mostly sunny

RealFeel Shade™91°

Heat Index93°

WindENE 8 mph

Air QualityFair

Max UV Index1.9 (Low)

Wind Gusts12 mph

Humidity72%

Indoor Humidity72% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling29900 ft

7 PM

84°
RealFeel® 91°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 51%
Chevron down
Partly sunny w/ t-storms

RealFeel Shade™91°

Heat Index94°

WindENE 7 mph

Air QualityFair

Max UV Index0.8 (Low)

Wind Gusts9 mph

Humidity80%

Indoor Humidity80% (Extremely Humid)

Dew Point77° F

AccuLumen Brightness Index™4 (Dull)

Cloud Cover25%

Rain0.15 in

Visibility4 mi

Cloud Ceiling29900 ft

8 PM

82°
RealFeel® 90°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 47%
Chevron down
Intermittent clouds

RealFeel Shade™90°

Heat Index89°

WindNE 7 mph

Air QualityFair

Max UV Index0.0 (Low)

Wind Gusts8 mph

Humidity79%

Indoor Humidity79% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover65%

Visibility10 mi

Cloud Ceiling7100 ft

9 PM

82°
RealFeel® 90°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 47%
Chevron down
Intermittent clouds

Heat Index88°

WindNE 6 mph

Air QualityFair

Wind Gusts7 mph

Humidity80%

Indoor Humidity80% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover65%

Visibility10 mi

Cloud Ceiling4000 ft

10 PM

82°
RealFeel® 87°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 51%
Chevron down
Mostly cloudy w/ t-storms

Heat Index88°

WindNE 5 mph

Air QualityFair

Wind Gusts6 mph

Humidity80%

Indoor Humidity80% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover70%

Rain0.07 in

Visibility5 mi

Cloud Ceiling4000 ft

11 PM

82°
RealFeel® 91°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 40%
Chevron down
Intermittent clouds

Heat Index89°

WindNE 5 mph

Air QualityFair

Wind Gusts6 mph

Humidity80%

Indoor Humidity80% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover70%

Visibility10 mi

Cloud Ceiling14700 ft

Hourly Weather Forecast for Key Biscayne

AccuWeather's hourly forecast for Key Biscayne provides hour-by-hour temperatures, RealFeel® Temperature, and precipitation probability through the next 10 days. The current hour shows 86° with a RealFeel® of 103°, mostly sunny with a 19% chance of precipitation. Each hourly forecast includes wind speed, humidity, air quality, UV index, and the AccuLumen Brightness Index™, AccuWeather's measure of perceived outdoor light intensity. Forecasts are generated by proprietary systems developed by AccuWeather meteorologists since 1962.

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