Great Blue Hole

Best time to dive

November to May

What you might see

• Bull sharkLikely
• Grey reef sharkLikely
• Hammerhead sharkLikely

Sightings are seasonal probabilities, not promises - even in peak season nature does its own thing.

Certification & difficulty

Advanced Open Water - advanced conditions (currents/depth); dive within your training.

Snorkelling

Not a snorkel site - Limited value for snorkeling the hole itself due to depth, but 'rim/perimeter' snorkeling is commercially offered as part of combined Lighthouse Reef Atoll snorkel tours while boat divers descend

Safety notes

Depth/no-decompression-limit management at ~40m, nitrogen narcosis risk, low ambient light, buoyancy control needed to avoid contacting protected stalactite formations; history of diver fatalities; UNESCO World Heritage Site/national monument — no touching/removing formations or marine life

Permits & fees

A protected-area entrance/park fee applies (Blue Hole Natural Monument) typically bundled into operator trip price; exact current USD amount not independently verified — '-'

Permits and operators change - confirm before booking.

Location

Nearest hub: San Pedro