Punta Sur Reef

Cozumel’s southernmost dive — an advanced cave and wall system combining the infamous Devil’s Throat tunnel with an exposed headland swept by strong open-ocean currents.

Overview

Punta Sur sits at the southern tip of Cozumel, where the island’s wall system meets the open Caribbean and currents converge from multiple directions. The site is best known for two distinct features: the Devil’s Throat (La Garganta del Diablo), a narrow descending tunnel that drops at roughly 45 degrees from around 30 meters to approximately 38–41 meters before exiting onto the open wall; and The Cathedral, a large connected cavern. The site may be classified as a cavern dive rather than a true cave because natural light is visible from most points inside, though the passages are too narrow to simply swim out. Maximum depth on the wall reaches 35 meters; the Devil’s Throat exit opens near the recreational dive limit. Because decompression stops may be necessary if progress through the tunnel is slow, this site demands excellent air management and current experience.

Hurricane Wilma note: The Cathedral was formerly famous for a natural crucifix-shaped sponge formation on its ceiling, backlit by light from a tunnel opening. Hurricane Wilma (2005) destroyed this sponge feature. The cavern itself is intact, but that specific visual element no longer exists.

The surrounding reef is in exceptional condition due to its remote location and reduced dive traffic. Visibility regularly exceeds 30 meters, and the exposed southern tip creates strong, variable current as the norm rather than the exception.

Site Information

• Location: Southern tip of Cozumel, Quintana Roo, Mexico
• Entry Type: Boat dive
• Site Type: Cave/cavern
• Difficulty Level: Advanced
• Maximum Depth: 35 meters
• Typical Visibility: 25–40 meters (80–130 feet)
• Current: Strong and variable — exposed headland with converging currents
• Best Time: November to April; summer months can have stronger, less predictable currents

Marine Life

The open-ocean positioning attracts large pelagics. Spotted eagle rays are frequently encountered in groups at depth. Caribbean reef sharks patrol the wall edge. Hawksbill turtles nest on the adjacent beaches and are reliably seen underwater. The wall sponge community is exceptional. Schools of Atlantic spadefish and horse-eye jacks congregate at the wall edge.

Dive Profile

Punta Sur requires a precisely timed boat entry to match the current cycle. Descend quickly once in the water. The Devil’s Throat tunnel entrance begins at approximately 24–30 meters; the tunnel descends at roughly 45 degrees and exits onto the open wall at 38–41 meters. Carry a torch — the tunnel sections are dark. Divers are advised against scissor-kicking inside as it stirs up sediment and drastically reduces visibility. Most time is spent between 18 and 35 meters. Ascent is in the water column away from the wall with SMB deployed.

Entry and Exit

Access is by boat only — 30–45 minutes from San Miguel. Only operators with solid familiarity with Punta Sur’s current patterns should be chosen. An SMB is absolutely required for the ascent.

Tips

• Carry a dive torch — the Devil’s Throat tunnel is genuinely dark
• Do not scissor kick inside the tunnel; flutter or frog kick to avoid silt-out
• Monitor your NDL continuously — the exit depth near 40 meters leaves little margin
• The Cathedral cavern is the highlight after the tunnel; ensure air budget covers both sections
• Stay close to your divemaster; current can disorient even experienced divers

Safety

This is an advanced site requiring strong buoyancy control, current-diving experience, and honest depth management. The Devil’s Throat exit near recreational limits means decompression risk if you linger at depth. Never attempt penetration without a torch and a certified guide. The recompression chamber in San Miguel is approximately 45 minutes away by boat.

Photography

The cavern interiors reward wide-angle shooting with natural light filtering through openings — divers silhouetted in the blue. Eagle rays at depth appear against the open water; have your camera ready at all times. The wall’s sponge life provides macro subjects for divers who can manage buoyancy in current.

Additional Resources

• Arrecifes de Cozumel National Park: Punta Sur requires park entry fee
• Last Updated: 2026-05-23

Sources: Wikipedia — Devil’s Throat at Punta Sur, The Reefs of Cozumel — Punta Sur, Pro Dive International — Punta Sur, PADI Dive Site — Punta Sur, Cozumel Divers — Devil’s Throat. Last updated 2026-05-23.