New York, NY 66° Los Angeles, CA 68° 🌤️ Chicago, IL Houston, TX 78° Miami, FL 77° Phoenix, AZ 86° Seattle, WA 58° Denver, CO 69° Toronto, ON 59° Vancouver, BC 63°
WeatherLive › Florida › Key Biscayne

Key Biscayne, FL Weather (33149)

Today Hourly 10-Day Weekend Monthly Radar Air Quality Climate
Current WeatherKey Biscayne · 9:15 AM EDT
91° | 82°
84°F
Feels like 93°
Partly cloudy
WindE 8 mph · Gusts 9 mph
Precip60% · 0.09 in
Humidity77% · Dew point 76°
UV index11 Extreme
Air Quality23 Good
Pressure30.03 inHg
Visibility6 mi
Sunrise / Sunset6:58 AM · 7:47 PM · 12h 49m

Weather map — Key Biscayne

Full radar →
Now
84°
23%
8 mph
10:00
84°
16%
9 mph
11:00
91°
15%
10 mph
12:00
87°
19%
11 mph
13:00
87°
11%
11 mph
14:00
86°
15%
11 mph
15:00
86°
16%
12 mph
16:00
86°
20%
11 mph
17:00
89°
13%
10 mph
18:00
88°
14%
11 mph
19:00
87°
15%
13 mph
20:00
87°
15%
15 mph
21:00
87°
5%
10 mph
22:00
86°
15%
10 mph
23:00
85°
0.09 in
9 mph
00:00
86°
0.02 in
11 mph
01:00
86°
16%
11 mph
02:00
86°
36%
12 mph
03:00
86°
0.04 in
11 mph
04:00
84°
18%
10 mph
05:00
85°
0.07 in
9 mph
06:00
84°
35%
11 mph
07:00
83°
0.05 in
10 mph
08:00
84°
19%
8 mph

Today · Tue 8/25

High 91°
60% / 0.09 in

Sunny. Winds SE at 15 mph.

Tonight · Tue 8/25

Low 83°
5% / –

Sunny. Winds E at 10 mph.

Tomorrow · Wed 8/26

89° | 83°
80% / 0.46 in

Showers. Winds SE at 15 mph.

7-day trend

Key Biscayne · temperature + precipitation

10-day forecast

Updated 9:15 AM

Details & indices

Wind
8 mph E
Gusts 9 mph
Humidity
77%
Dew point 76°
Pressure
30.03 inHg
Rising
UV index
11 — Extreme
High today
Air Quality
Good
AQI 23 · US EPA
Allergy
Moderate
Ragweed
Visibility
6 mi
Clear view
Allergy — Key Biscayne

🌿 Conditions right now

View all →
Birch
None
Grass
Moderate
Oak
None
Alder
None
Hazel
None
Mugwort
Moderate
Ragweed
Moderate

Sun & moon

Sunrise6:58 AM
Sunset7:47 PM
Length of day12h 49m
Moonrise6:25 PM
Moonset4:28 AM
Moon phase🌔 Waxing Gibbous · 93%
Next full moonAug 28 Sturgeon Moon
Latitude25.6937°N
Longitude-80.1628°E

Water temps nearby

View all →
South Beach, Miami Beach (6 mi)89°
Fort Lauderdale Beach (30 mi)88°
Key Largo (45 mi)90°
🌤️No rain expected in the next 90 minutes
Now+30+60+90 min
Minute-by-minute precip · HRRR nowcast

Daily planner

computed from today's forecast
Laundry day
Poor
Line-drying weather
Grilling
Fair
Fire up the grill
Running
Poor
Lace up outside
Patio
Fair
Dinner outdoors
Nearby places in {{REGION}}
🌤️
Jacksonville
—
—
Miami
Mostly cloudy
77°
Tampa
Partly cloudy
78°
Orlando
Mostly cloudy
74° 🌤️
St. Petersburg
—
—
Hialeah
Partly cloudy
79°
Data sources · Tuesday, August 25
Where the Key Biscayne forecast comes from
This page blends NOAA/NWS model guidance with global ensembles for the 10-day outlook, air quality and alerts. Data refreshes every hour, current conditions every 15 minutes. Coordinates: 25.6937°N, -80.1628°.
NBM + global weather models
Updated: 9:15 AM
Weather in Key Biscayne
Key Biscayne's outlook: warmest day near 92° (Thursday), coldest night about 82° (Tuesday). Roughly 1.2 in of rain falls over the period, with Wednesday the most likely wet day (80%). Expect a blustery spell — gusts near 25 mph on Thursday. No active NWS alerts at the moment — quiet on the hazards front. Right now Key Biscayne is running about 9° warmer than Palm Bay. Longer view: wet-summer, dry-winter Florida rhythm, with hurricane season June–November.
Key Biscayne, FL · Elev 3 ft · 25.69°N, 80.16°W · Florida · Forecast computed for these exact coordinates
Powered by NWS/NOAA guidance, multi-model forecasts and official environmental feeds · NOAA/NWS · EPA AirNow · MET Norway · global models
Updated: 9:15 AM