

Best for beginner divers, 5-30m, boat entry, mild current.
Mysterious Cave is a marine cave and cavern system located in the Rock Islands of Palau. The site features depths ranging from 5 to 30 metres, with an average depth of 20 metres. Divers access the site by boat. Conditions include mild currents and visibility typically between 15 and 30 metres, though visibility can shift significantly within the overhead environment. Water temperatures remain consistent between 28 and 30 degrees Celsius. Due to the overhead environment and potential for variable visibility, divers must maintain awareness of their surroundings and depth. The site is suitable for beginners, though specific cave access protocols and permit requirements should be confirmed with boat operators prior to arrival.
7.26802, 134.38233
Carry at least two dive lights rated for overhead environments, as visibility inside the cave can shift significantly from the open-water conditions outside. Confirm current cave access protocols and any permit requirements with your boat operator before the dive, as Rock Islands sites can have specific entry rules.
Located in Malakal Harbor, accessible by a five to ten minute boat ride from Koror.
Recorded at this site
Depth
5-30m
Visibility
15-30m
Skill Level
Beginner
Entry
Boat
Boat required
Water Temp
28-30°C
Current
Mild
Typical Dive
50 min
Best Time
Year-round
The site reaches depths between 5 and 30 metres, with an average depth of 20 metres.
Yes, the site is rated for beginner skill levels, though it involves an overhead environment that requires careful depth monitoring.
Access to Mysterious Cave is by boat only.
Hazards include the overhead environment, potential for low visibility, and depths reaching 30 metres.
Divers should carry at least two dive lights rated for overhead environments to account for shifting visibility inside the cave.
Diving at Mysterious Cave in Koror requires the following certifications: Advanced, Cave. Always dive within your training limits.
The best months to visit Mysterious Cave in Koror are January, February, March, April, May, June, July, August, September, October, November, and December. Conditions outside these months can still be good but are less predictable.
Mysterious Cave in Koror typically has mild currents that most divers can handle comfortably.
Visibility at Mysterious Cave in Koror typically ranges from 15 metres to 30 metres. Conditions vary with weather, tides, and seasons.