San Juan Reef - Cozumel

Temple Coral feels more like a sunken art installation than a natural reef, and we mean that as a compliment. This site, just off Lombok, is a fantastic example of a thriving artificial reef, maxing out at about 18 metres. What started as over a hundred concrete blocks and steel structures has transformed into a busy ecosystem, a true testament to how quickly marine life can reclaim new territory. You'll find these structures arranged on a gentle sandy slope, creating nooks and crannies perfect for exploration. We love how the concrete has become encrusted with different corals, attracting a good mix of residents. Look closely for the Elegant Sandburrower or Shimada's Pygmygoby darting between the crevices. False Brown Morays peek from the shadows, and you’ll often spot a few robust Groupers patrolling the edges. Our favourite part is the sheer density of Glassy Cardinalfish that often swarm the structures, reflecting the light in a shimmering cloud. It’s also a surprisingly good spot for finding some of the more unusual residents, like the Rosy Frogfish, if you have a keen eye. This site is brilliant for those who enjoy a slower paced dive, taking time to really examine the artificial habitats. It’s also excellent for anyone working on their Advanced Adventurer or Wreck Diver speciality, offering plenty of structure to navigate without being overly challenging. Visibility averages 16m, making for comfortable exploring.

Location
Cozumel, Mexico, North America
Coordinates
20.546800, -86.933000
Type
wreck

Marine Protected Area: Manglares y Humedales del Norte de Isla Cozumel

Best Time to Dive in Cozumel

The warmest water temperatures in Cozumel occur in September, averaging 29.8°C (up to 32.1°C). The coolest conditions are in February at 26.9°C.

The calmest sea conditions are typically in September with average wave heights of 0.70m. Average current speed: 95.0 cm/s.

Monthly Water Temperatures

  • January: 27.2°C (air: 26.2°C)
  • February: 26.9°C (air: 26.4°C)
  • March: 27.0°C (air: 26.5°C)
  • April: 27.5°C (air: 27.4°C)
  • May: 28.4°C (air: 28.2°C)
  • June: 29.0°C (air: 28.8°C)
  • July: 29.4°C (air: 29.4°C)
  • August: 29.6°C (air: 29.5°C)
  • September: 29.8°C (air: 29.5°C)
  • October: 29.6°C (air: 29.0°C)
  • November: 28.8°C (air: 27.9°C)
  • December: 27.9°C (air: 26.8°C)

Nearby Dive Sites in Cozumel

Nearest Dive Centres to San Juan Reef

Marine Life in Cozumel

Home to 181 recorded species including 140 reef fish, 15 hard corals, 9 other, 7 sharks & rays, 3 seagrass & algae, 2 whales & dolphins.

Notable Species

Recommended Packing List for San Juan Reef

Based on average water temperature of 28.4°C, visibility 23 nmi, currents 87 cm/s.

  • Shorty or Rashguard - warm 28°C water needs minimal exposure protection
  • Mask - essential for every dive
  • Fins (stiff blade recommended for strong currents)
  • BCD - buoyancy compensator
  • Regulator - your most safety-critical piece of gear
  • Dive Computer - tracks depth, time, and NDL
  • Surface Marker Buoy (SMB) - essential for boat pickups
  • Dive Torch - useful for crevices and colour at depth
  • Underwater Camera - capture your diving memories

Frequently Asked Questions

What is the typical depth range for diving at San Juan Reef in Cozumel?
Divers exploring San Juan Reef can expect a maximum depth of 20 meters. This makes it suitable for a range of recreational divers.
What kind of marine life and coral formations can divers expect to see at San Juan Reef, Cozumel?
At San Juan Reef, divers will encounter impressive coral formations including huge finger corals, lettuce coral, and sand sponges. The reef is also home to abundant marine life such as french grunts, schoolmasters, and thousands of damselfish, alongside red seaweed. For more information on marine species, visit our wildlife database.
How challenging is San Juan Reef in Cozumel for scuba divers, and what experience level is recommended?
San Juan Reef is rated as an intermediate dive site, making it suitable for divers who have some experience beyond entry-level certifications. It is often done as a second dive after more challenging sites like Barracuda or Cantrel.
When is the best time of year to dive San Juan Reef in Cozumel, considering its strong currents?
The provided data does not specify the best time of year to dive San Juan Reef or detail its current conditions. For general information on diving seasons in the region, please consult our When to Dive guide.
What scuba diving certifications are required or highly recommended to dive San Juan Reef in Cozumel?
Given its intermediate difficulty rating, divers should ideally possess certifications beyond basic open water, such as Advanced Open Water or equivalent, to comfortably explore San Juan Reef. This ensures you have the necessary skills for deeper dives and varying conditions.
What are the typical current conditions and visibility like at San Juan Reef in Cozumel?
Divers at San Juan Reef can typically enjoy excellent visibility, averaging around 24 meters. The provided data does not specify typical current conditions for this site.