gohawaii.com · Official Tourism
Official Lanai dive guide naming the cathedrals and local operator setup.
Dive Spot Guide•
First Cathedral
Boat-access lava-tube cavern off Lanai.
Local operator required
Boat-only access makes a guided charter the practical way to reach the cathedrals.
Guided boat dive with bright water, good visibility, and an overhead cavern that rewards small groups and tight buoyancy.
About First Cathedral
First Cathedral is a boat-access lava-tube cavern off Lanai that is known for its large opening, skylights, and the bright light beams that hit the interior. The site feels like an underwater room, with a reef section outside and a more dramatic overhead chamber in the middle. It is best treated as a guided scuba dive with tight buoyancy and small groups, because water movement and silt can build once several divers are inside.
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Research Estimate At First Cathedral
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 25m
AccessModerate entry effort
CoralHealthy coral
Aquatic LifeGreat variety
FacilitiesGood facilities
Crowd / PopularityQuite busy
CurrentModerate current
SurgeLight surge
Where Is First Cathedral?
This spotNearby spotsExplore nearby spots on the map
Community sourced coordinates.
First Cathedral Planning Details
Depth range, seasonality, and planning context.
Reported Depth
8m - 18m
Depth Note
Published site descriptions place First Cathedral around 25-60 ft, with the main cavern and adjacent reef spanning a modest recreational range.
Best Season
Year-round.
Typical Conditions
Good to very good visibility, variable current, and a photogenic cavern that is best handled by small groups.
Safety & Access At First Cathedral
Hazards, restrictions, and access requirements.
Key Hazards
Overhead environmentStrong currentSurge
Safety Notes
Treat the cavern as an overhead environment, keep buoyancy tight, and avoid stirring silt if several divers are inside.
Access Restrictions
Boat-only access and certified-diver entry into the overhead environment are the normal constraints.
Legal Notes
Follow operator briefing and overhead-environment rules for the cavern.
Local Intel For First Cathedral
Community notes to help plan your visit.
Scuba Diving
Guided boat dive through a broad lava-tube cavern with skylights, a central chamber, and an outside reef extension.
Freediving
Not a freedive target; the boat-only cavern and overhead environment make scuba the right fit.
Snorkeling
Not a routine snorkel site; the cathedrals are best experienced on scuba inside the cavern.
Wildlife at First Cathedral
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At First Cathedral
Community dive logs and visit reports for this site.
Dive Spot Log Averages At First Cathedral
Average conditions based on logged dives & visits.
Conditions
Avg. Visibility25m
Activity
No dive activity logged yet.
