Key Largo, FL
Key Largo, the "Dive Capital of the World," is the northernmost Florida Keys island, home to the first undersea park in the U.S., John Pennekamp Coral Reef State Park.
About the City
Official Status and Administrative Affiliation
Key Largo is an unincorporated area and census-designated place (CDP) in Monroe County, Florida, United States . It is located on the island of Key Largo in the upper Florida Keys. As an unincorporated community, it does not have a municipal government and is governed directly by Monroe County . The name "Key Largo" is derived from the Spanish "Cayo Largo," which means "long key" .
Date Founded and Age
While the island's history dates back much further, the name "Key Largo" appears on a map as early as 1639, drawn by Dutch cartographer Johannes Vingboons . The area was originally inhabited by the Calusa people . The post office serving the area officially adopted the name "Key Largo" on June 1, 1952, following the fame of the 1948 film of the same name .
Geographic Location and Coordinates
Key Largo is the largest and northernmost island in the Florida Keys archipelago, stretching approximately 33 miles (53 km) long . Its geographic coordinates are 25°6′24″N 80°25′48″W . The island is uniquely positioned, bordered to the west by Florida Bay and the Everglades National Park backcountry, and to the east by the Atlantic Ocean . The elevation of the area is very low, at about 6.6 feet (2 meters) above sea level .
City Type and Economic Specialization
Key Largo is a world-renowned tourist destination with a strong specialization in marine-related activities. Its economy is driven by tourism, with a primary focus on scuba diving, snorkeling, and sport fishing . It is often referred to as the "Dive Capital of the World" . The presence of John Pennekamp Coral Reef State Park, the first undersea park in the United States, solidifies its status as a premier eco-tourism and diving hub .
Population and Demographics
As of the 2020 United States Census, the population of the Key Largo CDP was 12,447 residents . The community has a median age of 43 years . It is a popular area for both permanent residents and visitors seeking a relaxed, coastal lifestyle .
City's "Calling Card" (Briefly)
Key Largo is a tropical paradise where the "island time" lifestyle meets world-class adventure beneath the waves . Famed as the "Dive Capital of the World," it offers unparalleled access to the only living coral barrier reef in the continental United States and a laid-back atmosphere steeped in Old Florida charm, from the historic African Queen to its lush botanical state parks .
Geography
Water Objects
The geography of Key Largo is defined by its relationship with the water. To the east lies the Atlantic Ocean, home to the clear, warm waters of the Gulf Stream . To the west is Florida Bay, which borders the Everglades National Park backcountry, creating a unique estuarine environment . The island itself is an exposed, fossilized coral reef, with a substrate of Key Largo limestone that is visible in many places . There are no natural sand beaches on the island; the natural shoreline is generally rocky .
Islands and Archipelagos
Key Largo is the northernmost and largest island in the Florida Keys archipelago, a chain of tropical islands stretching about 125 miles into the Gulf of Mexico . It is the first of the Keys reached from the mainland via the Overseas Highway (U.S. 1) .
National and State Parks
Key Largo is home to several protected natural areas:
- John Pennekamp Coral Reef State Park: Established in 1963 as America's first underseas park, it protects approximately 70 nautical square miles of coral reefs, seagrass beds, and mangrove swamps . The famous "Christ of the Deep" statue is located in the park's waters .
- Dagny Johnson Key Largo Hammock Botanical State Park: This park protects one of the largest tracts of West Indian tropical hardwood hammock in the United States, home to over 80 protected species of plants and animals .
- Florida Keys National Marine Sanctuary: Adjacent to Pennekamp, this sanctuary covers 3,800 square nautical miles and protects the diverse marine life surrounding the Keys .
Nearby Natural Wonders
Just a short drive from Key Largo lies Everglades National Park, one of the most remarkable ecosystems in the world . This UNESCO World Heritage site offers a vastly different landscape of freshwater sloughs, sawgrass prairies, and mangrove forests, providing opportunities for airboat tours and wildlife spotting, including alligators and manatees .
Climate and Weather
Climate Type and General Characteristics
Key Largo has a tropical monsoon climate (Am) according to the Köppen climate classification . It features a hot, wet season and a short, warm, and drier winter season. Frost has never been recorded on the island . The area enjoys close to 3,000 hours of sunshine annually .
Average Monthly Temperatures
The weather in Key Largo is warm year-round.
- Hottest Months: July and August, with average daily high temperatures of 89°F (32°C) and average lows of 79°F (26°C) .
- Coolest Months: January, with an average daily high of 76°F (24°C) and an average low of 63°F (17°C) .
Precipitation and Humidity
Key Largo has a distinct wet season.
- Wettest Months: The period from June to October is significantly wetter, with September being the wettest, averaging over 8 inches (213 mm) of rain .
- Driest Months: The winter and early spring months are much drier, with December and February averaging around 1.2 to 1.4 inches of rain .
- Humidity: The area is very humid year-round, with the perceived humidity being oppressive or miserable for much of the year, especially from April through October .
Sunshine and UV Index
Key Largo is very sunny. Daily hours of sunshine range from 7 to 9 hours throughout the year . The UV index is high to extreme for much of the year. It reaches its maximum of 11 (Extreme) from April through August, requiring consistent sun protection .
Hurricane Season
The official hurricane season runs from June 1 to November 30. The risk of tropical storms is highest from August through October .
Seasonality and Best Time to Visit
The best time to visit Key Largo for warm-weather activities is from mid-November to mid-April .
- Winter/Spring (December – April): This is the high season, with the most comfortable temperatures, lower humidity, and minimal rainfall. It's ideal for outdoor activities and escaping colder northern climates.
- Summer (May – October): This period is hot, humid, and rainy, with the highest chance of encountering tropical storms or hurricanes. However, it is also a time of lush landscapes and offers excellent conditions for diving and snorkeling.
Landmarks and Attractions
John Pennekamp Coral Reef State Park
As the first undersea park in the United States, this is Key Largo's signature attraction. Spanning approximately 70 nautical square miles, it offers visitors a chance to explore vibrant coral reefs through snorkeling, scuba diving, and glass-bottom boat tours . The park is home to the famous underwater "Christ of the Deep" statue, a 9-foot-tall bronze figure that is a popular site for divers .
Spiegel Grove Shipwreck
The USS Spiegel Grove is one of the largest ships ever intentionally sunk to create an artificial reef . This 510-foot-long vessel lies about 6 miles off Key Largo's coast and is a world-renowned destination for experienced scuba divers, now providing a habitat for a vast array of marine life .
The African Queen
A true piece of cinematic history, the African Queen is the original 1912 steam-powered vessel featured in the classic Humphrey Bogart and Katharine Hepburn film. Visitors can embark on 90-minute canal cruises aboard this meticulously restored boat, enjoying a unique blend of history and scenic waterways .
Dolphins Plus Bayside
This marine facility offers unique, hands-on encounter experiences with Atlantic bottlenose dolphins. Programs range from dockside observations to in-water swims, providing educational insights into dolphin behavior and marine conservation .
Dagny Johnson Key Largo Hammock Botanical State Park
A preserved tropical hardwood hammock, this park features miles of shaded trails perfect for hiking, birdwatching, and nature photography. It is a sanctuary for protected species, including rare tree snails and the Schaus swallowtail butterfly .
Florida Keys Wild Bird Rehabilitation Center
This center is dedicated to rescuing and rehabilitating injured wild birds. Visitors can walk along a boardwalk to see resident birds—those unable to be released—including pelicans, herons, and owls, in a natural setting .
The Caribbean Club
Located at Mile Marker 104, this waterfront bar is historically significant as the only location where the 1948 film "Key Largo" was actually shot . The walls are covered with memorabilia from the movie, making it a must-visit spot for film buffs .
Jules' Undersea Lodge
For a truly unique experience, Jules' Undersea Lodge is the world's first and only underwater hotel. Guests must scuba dive to their room, which is permanently anchored beneath the surface of a lagoon, offering an unforgettable "only-in-the-Keys" adventure .
Transport
Major Airports
Key Largo does not have its own commercial airport. It is about a 60-minute drive (approx. 57 miles) from Miami International Airport (MIA), which serves as the primary gateway for visitors flying into the area . Other nearby major airports include Fort Lauderdale-Hollywood International Airport (FLL) and Palm Beach International Airport (PBI) .
Public Transportation
Public transportation options are limited. The area is considered car-dependent, with a Walk Score of 37 out of 100 . However, private transportation services, like Florida Sun Transport, LLC, offer door-to-door service to and from the major airports .
Bus Service
Key Largo has an intercity bus stop served by Greyhound/FlixBus . The stop is located at 99501 Overseas Hwy, providing a connection to other Florida cities like Fort Myers and Miami. For local travel within the Keys, the community is served by key routes along the Overseas Highway.
Major Highways
The main artery through Key Largo is U.S. Route 1, also known as the Overseas Highway, which runs the entire length of the community and connects it to Miami (57 miles north) and Key West (97 miles southwest) . A second entry point from the mainland is via Card Sound Road (County Road 905) at the northern end of the island .
Biking
Key Largo is moderately bikeable, with a Bike Score of 61 out of 100 . The Florida Keys Overseas Heritage Trail provides a dedicated, scenic path for biking, jogging, and walking, offering panoramic ocean views and connecting many points of interest .
Water Transportation
While there is no public ferry system for passengers, numerous private charters and tour operators offer boat excursions for diving, snorkeling, sport fishing, and eco-tours, utilizing the many marinas and waterways around Key Largo.