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Florida Keys Diving - Exploring Coral Reefs, Marine Life, And Shipwrecks

Florida Keys Diving offers an unforgettable underwater adventure, featuring vibrant coral reefs, diverse marine life, and historic shipwrecks. As a premier diving destination, the Florida Keys provide divers of all levels with spectacular sights and experiences in the only living coral barrier reef in the continental United States.

Author:Velma Battle
Reviewer:Michael Rachal
Jul 20, 2024
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192.6K Views
The Florida Keys, an archipelago stretching over 120 miles off the southern tip of Florida, is renowned for its stunning underwater landscapes, making it a premier diving destination in the United States. From vibrant coral reefs teeming with marine life to historic shipwrecks steeped in mystery, the Florida Keys offer an unparalleled diving experience.
This guide will take you through the highlights of diving in the Keys, including top dive sites, marine biodiversity, and tips for an unforgettable underwater adventure.

Diving In The Florida Keys

The Keys are a series of narrow islands partly connected by more than 40 bridges, some of which are accessible only by boat. Geologically, they comprise two parts - the Upper Keys (down to Big Pine Key), and the Lower Keys (between Big Pine Key and Key West) with the Middle Keys (unsurprisingly) in between.
For divers, their significance is that the mass of the Keys – coral rock capped by Miami limestone – inhibits runoff from the Gulf side whilst on the Atlantic side there are barrier reefs to the west of the Straits of Florida and the fast-flowing Gulf Stream current.
As a result, although the coral is not great (pretty much anywhere in the Caribbean is better) it does provide a perfect habitat for marine life near deep waters with a lot of nutrients as well as numerous wrecks; there is almost always something memorable to see.
A Diver Spearfishing underwater
A Diver Spearfishing underwater

The Good News

As you would expect, there is excellent infrastructure on the Keys with a wide range of accommodations, restaurants, and bars to choose from even if some of the decoration is kitsch and the offering often in a rather monotonous ‘Keys Style’.
Shopping is limited and the tourist-oriented merchandise is pretty tacky, but divers’ needs are quite well catered through outlets like Divers Direct on Key Largo.
For the rest, somewhere in the Keys there is normally something going on topsides whether it’s the annual Hemingway look-alike competition in Key West, an arm wrestling contest, or a Harley Davidson bike run. There are many responsible dive operators in the Keys and, if you choose carefully, quite a few of them use small boats (six divers being typical) rather than juggernauts with 20 or more divers on board.
On the smaller vessels, you are usually left to your own devices, so you plan and run your dive without being shepherded back onto the boat after 40 minutes when you still have lots of air left. The boat captain will give you a site orientation, advise you of any potential issues and emergency procedures, and help with gear if required.
You may find that you quickly sharpen your navigation skills if they are a little rusty, but the task is relatively easy as the reefs are laid out in ‘finger’ formation so you either work your way up and down them or swim over their top to the next channel (remembering to count in both cases ! ).
Even in the shallow reef waters, there is plenty of life and you can have surprisingly close encounters with larger creatures such as nurse sharks, sting rays, and turtles, as well as lots of fun checking under coral outcrops and in crevices for moray eels, crabs and such like.
There are also one or two swim-throughs, but they are not very exciting. In deeper waters, there are world-class wrecks that can be stunning visually in their own right (the Spiegel Grove and the Duane off Key Largo and the Vandenberg off Key West come to mind) as well as attracting critters like schooling great barracudas, tarpon, and bull sharks as well as a host of larger fish.
Depending on the Gulf Stream, the visibility can be fantastic or dreadful and the currents can be negligible or ripping, so always descend on the mooring/anchor line and explore against the current. Divers should be experienced and appropriately certified and consider making an additional safety stop for a minute halfway up from any deep dive.
Dive boats go out twice a day, each time for two tank dives, typically leaving at around 08. 30 and returning at 12-ish before going out again at 13. 00 to return at 16. 30-ish. Night dives are possible but not widely available as a result of a relative lack of interest (sunset cocktails are perhaps more interesting? ) and the distance of the reefs from the shore, which can make for a boat ride of more than half an hour depending on the sea conditions.
For those who like to work while they play, many of the dive operators offer courses and it is possible to get certified up to Instructor level in the Keys. In case of Decompression sickness (the Bends) the Florida Keys Hyperbaric Center is located at Mariners Hospital in the Upper Keys.

The Bad News

The Gulf Stream shifts unpredictably from day to day with a potentially big impact on both factors and it is prudent to bear in mind that currents may be very different on the surface from underwater.
Offshore weather, especially when the wind whips up the waves, can occasionally be problematic and make reboarding the boat difficult. More recently, other troubling issues have arisen. Sadly, the backwash from the tragedy in New Orleans a few years ago does seem to have made visibility off the Keys less crystalline than it was (an awful lot of sewage and garbage was swept into the Gulf).
The environment has also been affected by the arrival of an invasive species, the lionfish, a venomous coral reef fish from the Indian and western Pacific Oceans that has made its way through the Panama Canal into the Caribbean, where it has no natural enemies and where it is making inroads into indigenous reef fish.
Divers are requested to report any lionfish sightings – boat captains have details of where to call. Another concern is coral bleaching and coral disease outbreaks which were reported in the summer of 2009.
Whatever your choice of housing and nourishment (by the way, day trips to Key Largo from Miami, which reduce the cost, are feasible if tiring), diving is never a cheap sport and the Keys are no exception.
Prices have edged up over the years to about US$ 75 for two tank dives. You may be able to negotiate a better deal if there are a number of you, or if you are diving for a few days or out of season.
Quoted prices will exclude Florida State tax (currently 7 %) as well as any tips you may wish to make to the captain/crew. Of course, if you need to hire equipment such as BCDs you will have additional charges.
Tourist divers, diving in the sea
Tourist divers, diving in the sea

Where To Go

Apart from the odd wrecks such as the Vandenberg and the Dry Tortugas (65 miles offshore Key West), the Lower Keys are not so hot for diving (the weird and wonderful life is topside in Key West).
In the Middle Keys are Sombrero Reef and Looe Key, now a reef, not an island, which has some excellent diving and probably the best coral in the Keys. That said, sites on the latter are limited so most people will be dived out within a few days. There are wreck dives in both locations.
Personally, for diving, I would recommend the Upper Keys and Key Largo in particular. In terms of access, it is less than an hour and a half from Miami, and it has the most extensive coral reef system in America, in the Atlantic southwest of the Key. There are several interesting wrecks within easy reach. Shore and support facilities are varied and good, and the financial crisis of the last couple of years has halted the previously remorseless move to take things upmarket.
One warning relates to the John Pennekamp Coral Reef State Park. Whilst it is great that 75 square miles of ocean are protected, if you prefer not to be part of a crowd I would recommend that you do not use one of the operators out of the Park as they tend towards activities en masse and ‘More means worse’.
Drive the famed Overseas Highway- the 112-mile road that links the myriad keys, expansive sky and blue water that comprise this coral chain — and you’ll find scores of dive flags fluttering from the dive shops that can put you on the reefs here. From Key Largo to Key West, the reefs are famed for their healthy fish populations, stands of corals and deep wrecks like the Spiegel Grove, Vandenberg and Eagle.
Spend a day of diving in warm, clear water and then find a place to kick off your flip-flops, drink a cold beer or frothy margarita and watch the sun seep into the water from a comfortable vantage point. You’ll soon understand why the unabashedly red, white and blue Conch Republic, from Key Largo to Key West, is one of the best places in the world to dive.
When to go diving- As far as conditions are concerned, the winter season naturally has colder water and is prone to poorer visibility and choppier seas. Whilst the reverse applies in summer, the downsides are that the weather can be very hot and humid and from July onwards there is a risk of hurricanes (the later in the season, the higher the risk given the latitude of the Keys – see separate comment in the Caribbean beachespages).
Tourist divers snapping under water
Tourist divers snapping under water

Florida Keys Weather

Best month for beachesand watersports- April-July. August is very hot and sticky, and expect storms. Also bear in mind that in holiday periods resorts and restaurants will be much busier and more pricey, particularly during American vacations.
The official hurricane season begins June 1 and ends on November 30 but storms/rain are most likely mid-August to mid-October. In summertime average high air temperature is 32C (89F), water temperature 30C (85F), and in winter air lows reach 18C (65F).
Get to the Keys from the mainland via U. S. 1, the Overseas Highway. Visitors to the Upper Keys can fly into Miami International Airport or Ft. Lauderdale-Hollywood International Airport. From there get a shuttle bus or rental car and arrive in the Upper Keys in about an hour from Miami or 100 minutes from Ft. Lauderdale.
Traveling to Key West from the mainland will take about 3. 5 hours. Tourists can fly to Marathon, the small city at the mid-point of the island chain, aboard small airlines such as Florida Coastal Airlines and SeaCoast Airlines. Shuttle buses and rental cars are available in Marathon. Visitors can also fly to Key West International Airport from many Florida cities. Shuttle buses and rental cars are available.

Florida Keys Diving - FAQs

What Are The Best Dive Sites In The Florida Keys?

Some of the best dive sites in the Florida Keys include John Pennekamp Coral Reef State Park, the USS Spiegel Grove wreck, the Christ of the Abyss statue, Molasses Reef, and the Vandenberg wreck.

What Is The Best Time Of Year For Diving In The Florida Keys?

The best time for diving in the Florida Keys is from late spring to early fall (April to October) when the water is warm, visibility is high, and marine life is abundant.

Do I Need To Be Certified To Dive In The Florida Keys?

Yes, you need to be a certified diver to participate in most scuba diving activities in the Florida Keys. There are also options for beginners, including Discover Scuba Diving programs and guided dives with instructors.

What Marine Life Can I Expect To See While Diving In The Florida Keys?

Divers in the Florida Keys can expect to see a variety of marine life, including colorful coral reefs, tropical fish, sea turtles, nurse sharks, barracudas, and occasionally, dolphins and rays.

Are There Dive Shops And Rental Equipment Available In The Florida Keys?

Yes, there are numerous dive shops and rental facilities throughout the Florida Keys offering equipment rentals, guided dives, and certification courses.

What Should I Bring For A Diving Trip To The Florida Keys?

For a diving trip to the Florida Keys, bring your certification card, dive logbook, personal dive gear (if you have it), sunscreen, a hat, a reusable water bottle, and a swimsuit.

Final Words

The Florida Keys offer an unparalleled diving experience, featuring vibrant coral reefs, historical shipwrecks, and diverse marine life. Whether you're a seasoned diver or a beginner, the Keys provide a range of dive sites and opportunities to suit all skill levels. With warm, clear waters and abundant sea creatures, it's a diver's paradise year-round.
The area's commitment to marine conservation ensures that these underwater treasures are preserved for future generations.
Whether you're exploring the iconic Christ of the Abyss, navigating through the USS Spiegel Grove, or simply marveling at the colorful reefs, diving in the Florida Keys promises an unforgettable adventure beneath the waves.
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Velma Battle

Velma Battle

Author
Travelling Expert
Michael Rachal

Michael Rachal

Reviewer
Travelling Expert
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