Tumon Bay

Best time to dive

January to December; September to December; December to April

What you might see

• Eagle rayReliably seen
• Grey reef sharkReliably seen
• Hammerhead sharkPossible
• Moray eelLikely
• Sea turtleReliably seen
• Whale sharkLikely

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

Certification & difficulty

Open Water

Snorkelling

Snorkel-friendly - Yes - shallow protected reef flat

Safety notes

Naval Base Guam runs the region's only recompression chamber (the busiest US Navy chamber in the Pacific), a notable safety plus; otherwise standard tropical boat/shore-diving precautions; no-take preserve, shallow at low tide - mind fragile coral

Permits & fees

Inside Tumon Bay Marine Preserve (no-take); no dive fee

Permits and operators change - confirm before booking.

Location

Nearest hub: Tumon (Guam)