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Key Largo is the largest and northernmost island in the Florida Keys archipelago, sitting roughly 60 miles south of Miami in Monroe County. It straddles a narrow strip of land along US-1, also called the Overseas Highway, with Florida Bay to the west and the Atlantic Ocean to the east. Despite its fame among divers worldwide, Key Largo functions as a working community of around 10,000 residents rather than a purpose-built resort destination.
The island's greatest claim to ecological significance is its proximity to John Pennekamp Coral Reef State Park, the first underwater state park in the United States, and the adjacent Florida Keys National Marine Sanctuary. Together they protect a vast stretch of living coral reef that draws snorkelers, divers, and marine researchers year-round.
Key Largo tends to feel more laid-back and locally oriented than Key West, its famous counterpart at the southern end of the chain. Visitors generally come for outdoor pursuits — on the water, under it, or along its shores — rather than for nightlife or cultural institutions. That simplicity is precisely its appeal for many travelers.
Before You Go
Visas and Entry
Key Largo is a US destination. Entry requirements depend entirely on your nationality and travel history. For guidance, visit TravelerPulse's Visas section and check the official US Customs and Border Protection website (cbp.gov) or the US Embassy in your country well in advance of travel.
Weather and Seasons
Key Largo has a tropical climate. The dry season runs roughly November through April — cooler temperatures (daytime highs often in the mid-70s°F / low-to-mid 20s°C), low humidity, and reliable sunshine make this the peak period. The wet season (May–October) brings afternoon thunderstorms, higher humidity, and hurricane risk. Hurricane season officially runs June 1 through November 30; monitor the National Hurricane Center (nhc.noaa.gov) if traveling in those months.
What to Pack
- Reef-safe, mineral-based sunscreen (required in and around protected reef areas; check current regulations locally)
- Rash guard or lightweight wetsuit if you plan to snorkel or dive repeatedly
- Insect repellent — mosquitoes and no-see-ums can be intense, especially near mangroves at dusk
- Water shoes for rocky shorelines and boat ladders
- Light layers for air-conditioned restaurants and any winter evenings
Getting There
By Air
The nearest major airport is Miami International Airport (MIA), approximately 55–65 miles north of Key Largo depending on your destination along the island. Fort Lauderdale-Hollywood International Airport (FLL) is a comparable alternative. Both are served by major domestic and international carriers. From either airport, Key Largo is typically 1–1.5 hours by car under normal traffic conditions, though weekend and holiday traffic on US-1 can extend that significantly.
Key Largo Airport (X51) is a small general aviation facility and does not serve commercial passenger flights.
By Car
US-1 (the Overseas Highway) is the primary and essentially only road connecting Key Largo to the mainland. From Miami, take Florida's Turnpike (SR-821) south to Homestead, then follow US-1 south onto the Keys. A car is strongly recommended — public transportation options in and around Key Largo are very limited.
By Bus
Florida Keys Shuttle and several shared-ride services operate between Miami and various points in the Keys; verify current schedules and stops directly with operators before booking, as service frequency and routes change. The Miami-Dade Transit bus system (Route 301) runs to Florida City on the mainland, after which connections into the Keys require other arrangements.
Getting Around
Key Largo is spread along a roughly 30-mile stretch of US-1, and most attractions, restaurants, and lodgings are accessed directly off this highway. A personal vehicle or rental car is the practical standard for getting around. Ride-share services (Uber and Lyft) operate in the area but availability can be inconsistent, particularly late at night or during peak season — do not rely on them exclusively.
Bicycling is possible along certain segments, and the Florida Keys Overseas Heritage Trail provides a dedicated multi-use path in several sections, though it is not continuous throughout Key Largo. Check the trail's current status with the Florida Department of Environmental Protection before planning a cycling itinerary.
Many water-based activities include boat transport as part of the tour package, so your hotel or dive shop location matters less than you might expect once you have confirmed excursion logistics.
Where to Stay
Accommodation in Key Largo spans small independent motels, fishing lodges, dive resorts, and a handful of larger resort-style properties. Many visitors prioritize properties that offer private boat docks, on-site dive shops, or direct water access over brand recognition. A motel directly on the water with a dock will often serve a diving or fishing trip better than a larger inland property.
Short-term vacation rentals through platforms such as Airbnb and VRBO are widely available and popular with families and groups. They frequently offer canal-front or bay-front access and more space than comparably priced hotel rooms.
Peak season (November through April) sees higher prices and lower availability. Book well in advance if traveling during the winter holidays, Presidents' Day weekend, or spring break. The shoulder months of October and May can offer good value with still-reasonable weather.
Things to See & Do
John Pennekamp Coral Reef State Park
This is the anchor attraction for most visitors. The park offers snorkeling tours, scuba diving, glass-bottom boat tours, kayak rentals, and a small visitor center with aquarium exhibits. Entry fees and tour prices apply; verify current rates and book tours in advance during peak season, as spots fill quickly. The park covers approximately 70 nautical square miles of Atlantic waters.
Diving and Snorkeling
Beyond Pennekamp, dozens of independent dive operators along US-1 run trips to nearby reef sites within the Florida Keys National Marine Sanctuary. Notable named sites include the Elbow, Molasses Reef, and the Christ of the Abyss statue (a submerged bronze figure at about 25 feet depth, one of the most photographed underwater subjects in North America). Skill levels range from beginner-friendly shallow reefs to deeper wreck dives. Confirm operator certifications and equipment quality before booking.
Fishing
Key Largo has a well-established sport fishing community. Charter boats offer backcountry flats fishing for bonefish, tarpon, and permit, as well as offshore trips for dolphinfish (mahi-mahi), sailfish, and wahoo. Fishing licenses are required for most fishing in Florida — verify current requirements with the Florida Fish and Wildlife Conservation Commission (myfwc.com).
Kayaking and Paddleboarding
The calm, shallow waters of Florida Bay on the Gulf side are well suited to kayaking through mangrove tunnels and tidal creeks. Several outfitters offer guided eco-tours and rentals. These tours offer excellent wildlife viewing — look for herons, ospreys, manatees, and juvenile reef fish in the shallows.
African Queen Canal Cruise
The original steamboat used in the 1951 Humphrey Bogart and Katharine Hepburn film The African Queen is docked in Key Largo and offers short canal cruises. Verify current operational status and booking details locally, as availability has varied over the years.
Food & Drink
Key Largo's food scene is anchored by fresh seafood — local stone crab (in season roughly October through May), Florida spiny lobster (in season August through March), yellowtail snapper, and conch fritters are staples on most menus. Dining is casual by nature; the island has no Michelin-starred restaurants, and flip-flops are standard dress at the majority of establishments.
A number of waterfront restaurants are clustered along US-1 and at marina properties. Eating at a place with a dock view is easy to arrange but not always an indicator of food quality — it is worth checking recent traveler reviews for any specific restaurant before committing. Seafood markets where you can purchase fresh catch directly also operate in the area.
Key lime pie is the regional dessert of the Florida Keys; a properly made version uses the small, tart Key lime and a graham cracker crust, and is typically pale yellow rather than green. Most restaurants on the island serve a version, and quality varies — locals will have opinions on who does it best.
The island has a handful of casual bars, many oriented around water views and happy hour specials. There is no significant nightclub scene; the culture skews toward early mornings for fishing and diving, which tends to shape the overall rhythm of evenings.
Practical Information
Emergency Services
For any emergency in the United States, dial 911. The nearest full-service hospital is in Homestead (Homestead Hospital), as Key Largo has only urgent care facilities. For serious medical emergencies, air transport to Miami may be arranged.
Connectivity
Cellular service from major US carriers (Verizon, AT&T, T-Mobile) is generally reliable along US-1 in Key Largo, though coverage can weaken on the water and in more remote areas of the bay side. Most hotels and many restaurants offer Wi-Fi.
Money
ATMs are available at banks and some convenience stores along US-1. Major credit cards are accepted at most lodgings and restaurants. Smaller bait shops, boat ramps, or market stalls may be cash-preferred — it is practical to carry some cash.
Environmental Responsibility
- Use only reef-safe, mineral-based sunscreen when entering the water near coral (and be aware regulations may require it — verify locally)
- Do not touch or stand on coral reefs; even brief contact causes lasting damage
- Observe no-motor zones and slow-speed manatee zones strictly — these are legally enforced
- Do not feed wildlife, including fish, rays, or birds
Safety
Key Largo is generally a safe destination for travelers. Petty theft from vehicles can occur in parking areas near boat ramps and beach access points — do not leave valuables visible in parked cars.
Water safety is the more relevant concern for most visitors. Ocean conditions can change quickly; always check current weather and sea conditions before heading out. If on a charter or guided trip, follow operator instructions closely. If renting kayaks or paddleboards independently, be aware of tidal currents, wind direction, and your own swimming ability. The Gulf Stream runs just offshore and conditions there can be much rougher than nearshore waters suggest.
Marine life encounters are common and generally low-risk. Jellyfish stings occur seasonally — local dive shops or the park service can advise on what species are active. Barracuda and sharks are present in reef environments but unprovoked attacks are extremely rare; avoid wearing shiny jewelry in the water and do not handle or harass marine animals.
Mosquitoes can be a genuine nuisance from late spring through early fall. Apply repellent, particularly at dawn and dusk near mangrove areas.
