Overview
Key Largo is the northernmost and largest of the Florida Keys, sitting roughly 60 miles south of Miami at the top of the Overseas Highway (US-1). It functions as the practical entry point to the Keys island chain and draws visitors primarily for its marine environment rather than nightlife or urban amenities.
The community is best known as the home of John Pennekamp Coral Reef State Park, the first undersea park in the United States, which protects a portion of the only living barrier coral reef in the continental US. That ecological distinction shapes nearly everything about how people spend time here.
Key Largo has a laid-back, outdoor-focused character. Accommodation ranges from independent dive resorts and waterfront motels to larger chain properties along US-1. The commercial strip on US-1 can feel unremarkable, but the real draw is consistently what lies beneath the water rather than above it.
Before You Go
Visas and Entry
Key Largo is a US destination. For visa and entry requirements, check TravelerPulse's Visas section and consult the official US Customs and Border Protection website (cbp.gov) for current rules.
Weather and Seasons
Key Largo has a subtropical climate with two broad seasons. The dry season (December–April) brings lower humidity, less rain, and calmer ocean conditions — ideal for diving and boating. The wet season (May–November) brings afternoon thunderstorms, higher humidity, and meaningful hurricane risk. Water temperatures are warm year-round, hovering roughly in the mid-70s°F in winter and mid-80s°F in summer (verify current averages locally).
What to Pack
- Reef-safe sunscreen (Florida law restricts certain chemical sunscreens near coral reefs — check current regulations before you travel)
- Light, breathable clothing; a light layer for air-conditioned restaurants
- Water shoes or sandals
- Any personal snorkeling or diving equipment you prefer (rentals widely available)
- Insect repellent for evenings, especially near mangroves
Health Notes
No special vaccinations are required for domestic US travelers. Jellyfish, sea urchins, and fire coral are present in local waters — ask dive operators about current conditions before entering the water.
Getting There
By Air
The nearest major airport is Miami International Airport (MIA), roughly 60 miles north of Key Largo. Fort Lauderdale-Hollywood International Airport (FLL) is a similar or slightly longer drive depending on traffic. Key West International Airport (EYW) is further south and less useful as an arrival point for Key Largo specifically. Verify current airline routes and schedules on your preferred booking platform.
By Car
Driving is by far the most practical arrival method. From Miami, take the Florida Turnpike south to US-1, then continue south through Florida City and across the Card Sound Road or the main Overseas Highway. The drive typically takes 60–90 minutes from Miami under normal conditions, but traffic on US-1 through the Keys can slow significantly on holiday weekends and Friday afternoons. A car is also essential for getting around once you arrive.
By Bus
Florida Keys Stagecoach (operated under the Miami-Dade Transit umbrella) and the Keys Shuttle offer scheduled bus and shuttle services connecting Key Largo to Miami and other Keys communities. Confirm current routes, schedules, and fares directly with operators before travel, as service levels change.
By Boat
Some visitors arrive by private boat, with marina slips available at several locations along the island. Verify slip availability and rates directly with individual marinas.
Getting Around
Key Largo is a long, narrow island with essentially one main road — US-1 (the Overseas Highway) — running its length. Without a car, mobility is significantly limited.
Rental car: Picking up a rental at Miami or Fort Lauderdale airport before driving down is the standard approach. There is limited rental availability within Key Largo itself — verify locally.
Rideshare: Uber and Lyft operate in the area but coverage can be inconsistent compared to a major city. Availability may be limited late at night or during busy periods.
Bicycle: Some resorts rent bicycles for guests, and cycling is feasible for short distances along quieter roads, but US-1 itself can be fast-moving and is not comfortable for most cyclists.
Boat: Water taxis and charter boats connect to various dive sites and nearby areas. Many activities (dive trips, snorkel tours) involve boat transport arranged through local operators.
Where to Stay
Accommodation in Key Largo skews toward dive resorts, independent waterfront motels, and vacation rentals rather than large branded hotels, though some national chain properties do exist along US-1. Many visitors book vacation rental homes or cottages with private dock access, which is practical if arriving by boat or wanting easy water access.
Dive resorts cater specifically to divers with on-site air fills, gear storage, and direct boat departures — a practical choice if diving is the main focus of your trip.
Prices rise significantly during the December–April high season and around US holiday weekends. Booking well in advance is advisable for popular periods. Verify current rates and availability directly with properties or on booking platforms.
Key Largo has no true resort district or walkable town center — accommodations are spread along a roughly 30-mile stretch of US-1, so consider location relative to the activities you plan.
Things to See & Do
John Pennekamp Coral Reef State Park
This is the centerpiece attraction and should be the first stop for most visitors. The park offers snorkeling tours, scuba diving trips, glass-bottom boat tours, kayak rentals, and paddleboard rentals. The park's concession operator runs scheduled boat departures; booking in advance is strongly recommended during busy periods. Verify current tour times, prices, and availability on the park's official website or by calling the park directly.
Diving and Snorkeling
Beyond Pennekamp, numerous private dive operators along US-1 offer reef trips, wreck dives (including the Spiegel Grove, a large decommissioned Navy ship intentionally sunk as an artificial reef), and night dives. Operators offer equipment rental, and many run PADI certification courses. Compare operators, read recent reviews, and confirm current pricing before booking.
Sport Fishing
Key Largo has a well-established charter fishing industry. Both offshore and backcountry (flats) fishing are popular. Backcountry guides target bonefish, tarpon, and permit in the shallow Florida Bay flats to the west. Offshore trips target mahi-mahi, sailfish, and tuna. Charter rates and trip structures vary — contact operators directly.
African Queen Canal Cruise
The African Queen, the actual steam-powered vessel used in the 1951 Humphrey Bogart film, is based in Key Largo and offers canal cruises. Verify current operational status and booking details locally, as availability can change.
Kayaking and Paddleboarding
The mangrove-lined backcountry waterways of Florida Bay offer excellent flat-water paddling. Several outfitters provide guided eco-tours through the mangroves, which are particularly good for wildlife observation including birds, manatees, and dolphins.
Food & Drink
Key Largo's dining scene is casual and seafood-forward. Expect open-air or indoor-casual settings; fine dining options are limited compared to a larger city.
Seafood is the obvious focus — stone crab claws (in season, roughly October–May), Florida lobster (spiny lobster, not Maine lobster), fresh fish tacos, conch fritters, and fish sandwiches appear on most menus. Quality and freshness are generally good given the proximity to working docks.
Key lime pie is ubiquitous throughout the Keys. Authentic versions use real Key lime juice and have a pale yellow (not green) filling. It is worth trying from multiple spots to form your own opinion.
The US-1 strip has a predictable mix of chain fast food alongside independent waterfront restaurants. A number of restaurants are attached to marinas or dive resorts and offer the best atmosphere. Many spots close relatively early compared to urban areas — plan dinner before 9 PM to ensure the most options.
Bars and casual waterfront spots serving beer, rum drinks, and frozen cocktails are common and fit the relaxed local culture. Verify hours locally, as they shift seasonally.
Practical Information
Money
US dollars are the currency. ATMs are available at banks and some convenience stores along US-1. Credit cards are widely accepted. Tipping follows standard US convention (15–20% at restaurants, tips for dive guides and boat captains are customary and appreciated).
Connectivity
Cell service from major US carriers is generally reliable in Key Largo, though it can drop off in remote backcountry areas on the water. Most hotels and resorts offer Wi-Fi.
Emergency Services
Dial 911 for police, fire, or medical emergencies — standard US emergency number. The nearest hospital with full emergency services is in the Homestead/Florida City area to the north; verify the current nearest facility before your trip as healthcare options within the Keys themselves are limited.
Reef Etiquette
- Do not touch, stand on, or collect coral — it is illegal and causes lasting damage
- Anchor only in designated areas; reefs are easily damaged by anchors
- Follow all guidelines from your dive or snorkel operator
Useful Contacts
- John Pennekamp Coral Reef State Park: verify phone and hours on the Florida State Parks official website (floridastateparks.org)
- Monroe County (local government): monroecounty-fl.gov
Safety
Key Largo is generally a safe destination with low rates of violent crime. Standard urban common sense applies — secure valuables in your vehicle out of sight and be aware of surroundings in isolated areas after dark.
Water safety is the more relevant concern for most visitors. Currents at reef sites can be stronger than expected, especially during tidal changes. Always dive or snorkel with a reputable licensed operator and honestly disclose your experience level. Decompression illness (DCS) is a risk for divers — DAN (Divers Alert Network) recommends waiting at least 12–24 hours after diving before flying; follow your operator's guidance.
Sun and heat are underestimated hazards. Sunburn can occur quickly on the water, and heat exhaustion is possible during summer months. Stay hydrated, apply sunscreen regularly, and seek shade during peak afternoon hours.
Hurricane preparedness: If visiting during hurricane season (June–November), monitor NOAA forecasts and be prepared to adjust travel plans on short notice. Evacuation of the Keys via US-1 can take considerably longer than normal during a storm evacuation order due to limited road options.