Scuba Diving in Andros

Diving in Andros is diving the edge of a cliff. The Andros Barrier Reef runs down the island's east coast, widely described as the third-largest barrier reef in the world, and then it simply stops and drops into the Tongue of the Ocean, an Atlantic trench falling to over 6,000 ft. The wall lip sits in roughly 40 to 80 ft (12 to 24 m) of water, which means you reach the edge of the abyss at recreational depths, minutes from shore. Turnbull's Gut is the dive that sells the island: you drop into a fissure at the top of the reef, swim a coral-lined tunnel with rock on every side, and pop out at 120 ft (37 m) with nothing beneath you but thousands of feet of open water.

Andros is also the blue hole capital of the world. There are more than a hundred off South Andros alone, and around 200 island-wide, sitting on a fault line that runs for over 50 miles (80 km). They're tidal, which makes them close to unique: the same hole dives completely differently four times a day. The freshwater lens on top is at least 10 °F (about 6 °C) cooler than the ocean, and crossing the halocline where fresh meets salt is like swimming through gasoline, everything blurring and shimmering until you break through into gin-clear water below.

This is the largest and least developed island in the Bahamas, and that shows up underwater. No golf-course runoff, no blast fishing, near-zero coastal development. The barrier reef's inner sites are shallow, sheltered coral gardens that suit brand-new divers, and both dive resorts run beginner courses. But the island's identity is the advanced stuff: the walls, the caverns, the wrecks, and the blue holes.

One structural thing to know. Andros is cut into pieces by bights and there's no continuous road, so where you land matters. North and Central Andros is wall, wreck and shark diving. South Andros is where the blue-hole density is. They are not a short drive apart.

Best dive sites in Andros

Turnbull's Gut

The single best briefing on the island, and the dive that makes Andros make sense. A large fissure splits the coral buttress that runs along the very edge of the Tongue of the Ocean. You drop in at the top of the wall, swim into a coral-lined tunnel with rock surrounding you on all sides, and then it opens.

You exit at 120 ft (37 m), and there is nothing beneath you. Not a sandy bottom, not a distant reef. Thousands of feet of open blue water dropping away into the dark. It reorganises your sense of scale, and it's the moment divers remember years later.

Depth: Wall top 40–80 ft (12–24 m); exit 120 ft (37 m) | Level: Advanced

Over the Wall

The island's signature wall dive and the site everyone names first. You drop over the lip of the Andros Barrier Reef into the Tongue of the Ocean with 6,000 ft (1,830 m) of nothing below you. The wall runs down to an ancient ice-age shoreline, and the top of it is a maze of coral grottos.

That structure is what makes it work as a multi-level dive. Go deep and hang out in the blue watching for big animals, or stay shallow and work the grottos on the reef top. Either way you're diving the edge of the Atlantic.

Depth: Wall lip 40–80 ft (12–24 m); typical profiles 80–130 ft (24–40 m) | Level: Advanced

The Blue Holes: Stargate and El Dorado

Andros' identity dive, and the one that needs the most honesty about certification. Stargate, in South Andros, is a partially roofed cavern with a 20 ft (6 m) drop to the water, opening into a shaft that runs past 262 ft (80 m) with rift passages heading north and south. National Geographic ran a cover story on the Bahamas blue holes that featured it. Rob Palmer and Stephanie Schwabe recovered a Lucayan ceremonial canoe from a ledge inside Stargate at around 65 ft (20 m), buried under leaf litter rather than lying at the bottom of the shaft, and Palmer's team excavated 17 sets of Lucayan human remains from a separate Andros cave called Sanctuary.

Certification requirements here are set by the operator, hole by hole, and no operator publishes a blanket entry standard. Some guided blue hole dives are sold to recreational divers: Andros Beach Club runs a guided Inland Blue Hole Dive that includes El Dorado, and Small Hope has open ocean blue holes and naturally lit caverns on its regular weekly schedule. The deep inland systems are a different sport, requiring cavern or cave training and fully redundant cave equipment. Small Hope's own line is that you should "inquire for specialty dive eligibility," which is exactly right: eligibility is assessed case by case, so ask your operator before you book.

El Dorado is the other named hole worth knowing, a true cave mouth hung with stalactites. By published accounts you swim through a tunnel and surface under a second, separate lake, looking up through green filtered light. That is a genuine overhead traverse, not a light-zone rim swim, so treat it accordingly and confirm the format and the requirements with the operator. Everything here is tidal, so the guide picks the hour, not you.

Depth: Varies by hole — El Dorado ~90 ft (27 m); Stargate's main shaft past 262 ft (80 m) | Level: Operator-determined

The Marion (the AUTEC wreck)

A US Navy crane barge from AUTEC, the Navy's deep-water submarine testing range in the Tongue of the Ocean, deliberately sunk as an artificial reef. The unusual detail is that the tractor and crane boom went down with it and are still on the site.

She sits on clean sand ringed by coral heads, which is why the operator calls her one of the most biodiverse wrecks in the Bahamas. Southern stingrays cruise the sand constantly, morays sit in the dark recesses, and if you're very lucky a silky shark makes a brief, unpredictable appearance. Night dives run on Andros, though the site depends on the day, so ask if you want the Marion after dark.

Depth: 60–80 ft (18–24 m); most sources 70 ft (21 m) | Level: Open Water with a guide to Advanced

The Shark Dive

Andros runs its shark dive differently, and that difference is the point. There's no handler in the water passing fish to sharks. A frozen chumsicle is lowered to about 30 ft (9 m) and the sharks work it, while divers set up on the sand at 50 ft (15 m). It is less regimented than most Bahamas shark dives, and the operator has described running it "just as we do any other dive," but its current safety protocol has divers set up kneeling off to the side of the feeding area. Confirm the format on the day rather than turning up expecting free rein.

Caribbean reef sharks are the reliable species, along with nurse sharks and grouper big enough to crash the party. Divers also report blacktips, lemons and silkies turning up, though the operator only names Caribbean reef sharks as dependable. Afterwards you comb the sand for shed teeth to take home.

Depth: Divers at 50 ft (15 m); chumsicle at 30 ft (9 m) | Level: All Levels

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Best time to dive Andros

The best time to dive Andros is November through May, when the dry season cuts the runoff, lifts the visibility and puts the most sharks on the reef.

Hurricane season runs June 1 to November 30, peaking August to October. The diving itself doesn't degrade much in summer, but Andros is low-lying and flood-prone, and the practical constraint is cancellation risk rather than water quality. Trip insurance with named-storm coverage is standard advice for that window.

Diving conditions in Andros

Diving conditions in Andros are excellent most of the year, and the thing that ruins them isn't what you'd expect.

The thing that wrecks visibility here isn't rain. It's what locals call "dry rage," swells that originate on the ocean floor and produce lousy visibility and miserable chop even when the sky looks perfect. Dry rage can cancel ocean diving outright, which is exactly why nothing is pre-booked on Andros and why the inland blue holes function as the island's weather insurance.

The reef system is a genuine barrier reef with a lagoon, one of very few in the Atlantic, running from sandy bottom through seagrass and patch reef out to the barrier and then over the edge into the Tongue of the Ocean. Sources disagree wildly on its length, from roughly 100 to 190 miles (160 to 306 km), so treat any precise figure with caution. The Bahamas National Trust, which manages the marine parks along it, says "over 124 miles" (200 km), and that's the number to quote if you need one. What isn't in dispute is the drop-off.

Marine life in Andros

Marine life in Andros benefits from the thing that makes the island frustrating to reach: almost nobody lives here. No runoff, no blast fishing, minimal development. What you see underwater is close to what the reef looked like before anyone showed up.

Caribbean reef shark (Carcharhinus perezi): November to May, especially on the barrier reef and the shark dive

The emblem species, and the numbers peak in the dry season. On most dives you'll encounter at least one.

Cave-adapted species: year-round, in the South Andros blue holes

Genuinely rare, highly specialised and often endemic cave fish, cave shrimp and bacteria with extremely restricted ranges. Research in the South Andros holes has turned up new bacterial species, microbial life that may be among the closest analogues we have to early life on Earth. Abaco, Grand Bahama and Long Island have their own cave systems and their own cave-adapted fauna, but nowhere else in the Bahamas has anything like this density of blue holes.

• Nassau grouper (Epinephelus striatus): the flagship species the marine parks were built to protect, and commonly seen on the reef sites.
• Southern stingray: constant on the sand flats and around the Marion wreck.
• Reef and resident life: spotted eagle ray, green moray, nurse shark, barracuda, black grouper, horse-eye and bar jack, big schools of French and blue-striped grunt, blue tang, parrotfish, spotted drum, glassy sweepers schooling in the caverns, spiny lobster, queen conch, green and hawksbill turtles.
• Corals: elkhorn and staghorn (both endangered), star and brain corals, black coral and wire corals deeper on the wall, and rare cryptic sponges in the caverns.

Conservation here is real and recent. The North and South Marine Parks, designated in 2002 and managed by the Bahamas National Trust, protect 8,500 acres of the healthiest barrier reef as strict no-take zones. Blue Holes National Park, also from 2002, covers roughly 40,000 acres of inland blue holes and surrounding forest, including 22 protected inland holes. Both dive resorts run coral nurseries with the Reef Rescue Network and the Perry Institute for Marine Science, out-planting endangered staghorn coral, and one of them maintains what it describes as the first and only blue-hole coral nursery in the world. You can dive the nurseries and help maintain them.

Discover more marine life on Divearoo's global heatmap.

Practical information

Dive prices

A two-tank boat dive runs $150 in Central Andros and around $220 in South Andros, and note that the 10% Bahamas VAT is often quoted separately and added at checkout. Inland blue hole dives run about $190. The shark dive is around $125 with a six-diver minimum. Coral-restoration dives with the Reef Rescue Network are roughly $245. Gear rental is $35 to $40 a day for BCD and regulator, with wetsuit and computer sometimes charged on top.

Park fees changed recently. The Bahamas National Trust introduced entrance fees across its entire national park system, terrestrial and marine, on 1 July 2026: $15 adult, $8 child, $10 senior, free for BNT members, with annual and multi-park passes also available. Blue Holes National Park and the North and South Marine Parks both sit inside that system. How and whether the fee is collected on a boat dive or a blue-hole trip isn't yet clear from published sources, so ask your operator whether it's bundled into your dive price or paid separately.

Overall a $$$ destination: the diving isn't extravagant, but there's no cheap way onto the island and no budget accommodation tier.

Getting there

Andros has four airports, and picking the wrong one puts you hours of bad road and open water away from your resort. Andros Town / Fresh Creek (ASD) serves Central Andros. Congo Town (TZN) serves South Andros. San Andros (SAQ) is the north, and Clarence A. Bain (MAY) serves Mangrove Cay. Andros is cut into pieces by bights, and there is no continuous road connecting them.

The standard route is a 15 to 20 minute scheduled flight from Nassau, not a private charter. Le Air and Titan Air both run the hop twice daily for roughly $175 to $180 per person round trip, and each carrier is dark one day a week (no Le Air on Sunday, no Titan on Saturday), so check the calendar before you lock in your international flights. Genuine private charters from Nassau exist but cost $1,100 to $2,500 one way.

Direct shared charters from Fort Lauderdale Executive run around $820 round trip. There are also weekly mailboats from Potter's Cay in Nassau, cheap and slow at roughly five and a half to seven hours.

The nearest recompression chamber is in Nassau, a multiplace chamber pressurisable to 165 ft (50 m), which is unusually capable and only a 15 to 20 minute flight from Andros Town. That's genuinely reassuring for an island this remote.