Average monthly water temperature in Key Biscayne, the United States of America
On this page you find the mean water temperature over the year in Key Biscayne (Florida), the United States of America. Dive into the water temperature trends, highlighting the best times for swimming and other activities.
In Key Biscayne, water temperatures are consistently warm throughout the year. The warmest month is June, with an average water temperature of 28°C (82°F).
The coolest month is January, with an average temperature of 24°C (75°F). This makes Key Biscayne a year-round destination for swimming and other water-based activities.
Key Biscayne Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Key Biscayne - and find the best time to visit.
Key Biscayne 3-Day Forecast
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Key Biscayne climate overview or explore weather in the United States of America.
Popular this month
Where to go in August - average daytime high across popular destinations.
Kissimmee
33°C (91°F) Orlando33°C (91°F) Miami Beach32°C (90°F) Destin32°C (90°F) New York City
29°C (84°F) Big Bear Lake
27°C (81°F) Los Angeles
24°C (75°F) San Francisco22°C (72°F) 
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
The 10 most alternative cities in the United States
Discover the top 10 fun and alternative U.S. cities rich in art, culture, and adventure. From Portland's hippy charm to Sedona's stunning landscapes.
Sedona: Explore Majestic Red Rock Landscapes
A picturesque artists' town surrounded by red rocks and known for its spirituality, vortex energy, and stunning hikes like Cathedral Rock.
10 most idyllic villages to visit in the United States
Discover 10 idyllic villages in the USA, from California to Vermont. Explore their unique charm, rich history, stunning nature, and vibrant arts scenes.