Playa del Carmen - Cozumel

Shark Alley, despite the name, isn’t about big toothy predators. It’s about being utterly swarmed by Cape fur seals, and we love it for that. This isn't a deep dive; you’re staying mostly in the 3-5 meter range, often less. It’s more of an interaction than a reef exploration. We generally hop on a boat out here, though if you’re keen for a shallow shore entry, that's an option too, but you’ll want to pick your tide carefully. The sheer number of seals is the draw. They zip around you, blowing bubbles, nipping playfully at fins, their sleek bodies a blur in the green water. It's a sensory overload of movement and sound – you can hear their barks and chirps, even underwater. Visibility averages around 8 meters, which is plenty to see the chaos unfolding. We’d suggest going in the morning; the seals tend to be most active before the wind picks up. It’s a riot of a dive, perfect for photographers wanting action shots and anyone who just wants to feel completely immersed in marine animal antics.

Location
Cozumel, Mexico, North America
Coordinates
20.634900, -87.058200

Marine Protected Area: Caribe Mexicano

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 Playa del Carmen

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 Playa del Carmen

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