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Key Biscayne

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Key Biscayne Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Key Biscayne year round climate

  • Spring (March–May): Average 76–82°F, warm and comfortable climate, sunny, pleasant sea breeze. Common activities: Swimming, sunbathing, water sports, visiting Biscayne National Park. Suggested clothing: Light short-sleeved clothing, shorts, beachwear, sun protection clothing.
  • Summer (June–August): Average 83–85°F, hot and humid, more rainfall, occasional tropical storms. Common activities: Swimming, water sports, relaxing in the shade, visiting museums or indoor attractions. Suggested clothing: Light and breathable clothing, loose shorts or skirts, sun protection clothing, rain gear.
  • Autumn (September–November): Average 80–84°F, warm and comfortable climate, gradually decreasing rainfall, abundant sunshine. Common activities: Swimming, sunbathing, water sports, outdoor hiking. Suggested clothing: Light long-sleeved clothing, trousers or skirts, sun protection clothing.
  • Winter (December–February): Average 70–72°F, warm and comfortable, less rainfall, abundant sunshine, a comfortable season for sightseeing. Common activities: Swimming, sunbathing, water sports, bird watching. Suggested clothing: Light jacket, long-sleeved clothing, trousers or skirts.

Key Biscayne climatological average

Annual average temperature: approx. 78.8°F / Annual rainfall: approx. 1902 mm / Summer humidity: 70%–80% / Rainiest month: June

Key Biscayne monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
70.5°F
58.7
February
72.7°F
87.7
March
76.3°F
95.7
April
78.1°F
147.3
May
82°F
123.7
June
83.1°F
346
July
85.6°F
150
August
85.6°F
239
September
84.6°F
288.3
October
81°F
153.7
November
77.9°F
155.3
December
71.8°F
57.3

Key Biscayne weather for the next seven days

9/22
Tuesday
Overcast
86.4°F/81.9°F
9/23
Wednesday
Light rain shower
84.2°F/78.1°F
9/24
Thursday
Overcast
85.7°F/80.8°F
9/25
Friday
Sunny
88.3°F/78.4°F
9/26
Saturday
Sunny
86.6°F/78.5°F
9/27
Sunday
Patchy rain nearby
84.3°F/79.9°F
9/28
Monday
Overcast
85.8°F/80.5°F

Key Biscayne Frequently Asked Questions and Useful Information for Travel

What is special about Key Biscayne?

Key Biscayne is special for its pristine white sandy beaches and clear blue waters, offering a tranquil and exclusive island lifestyle close to Miami. It's renowned for its lush state and county parks, including Bill Baggs Cape Florida State Park, which boasts a historic lighthouse. Visitors and residents enjoy abundant outdoor recreation such as water sports, biking, and exploring scenic waterfront properties.

Is Key Biscayne a wealthy area?

Key Biscayne is known as a affluent neighborhood, offering a lifestyle that appeals to those who enjoy country club amenities like tennis, golf, and sailing.

Is it worth going to Key Biscayne?

Yes, Key Biscayne is definitely worth visiting for its stunning natural beauty, including beautiful beaches and scenic parks, and offers a wonderfully relaxing atmosphere. It provides excellent access to nature and a wide array of outdoor activities like biking, boating, and fishing. While it presents a quieter, resort-style experience near Miami, it's ideal for those seeking a peaceful escape.

How do I spend a day in Key Biscayne?

To spend a day in Key Biscayne, you can start by visiting the Dante Fascell Visitor Center. Explore the island's natural beauty, perhaps by kayaking or paddleboarding through the mangroves. Snorkel through the coral reefs in Biscayne National Park, or visit the historic Cape Florida Lighthouse for panoramic views. Enjoying time on the sandy beaches of Crandon Park is also a great way to spend your day.

What are the top outdoor activities in Key Biscayne?

Key Biscayne is a paradise for outdoor enthusiasts. Popular activities include relaxing on the white sandy beaches, swimming in the clear blue waters, and engaging in water sports like kayaking, jet-skiing, windsurfing, and kiteboarding. Boating, fishing, and scuba diving in the nearby Biscayne National Park are also highly recommended. The island also offers great opportunities for biking, walking, and jogging, especially along the Rickenbacker Trail.