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Local dive-operator site listing with depth, visibility, and skill-level context.
Dive Spot Guide•
The Tunnel - Guam
The Tunnel - Guam is a clear-water boat dive with a natural reef opening.
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A northern boat dive with a tunnel-like reef opening, caverns, and sand channels; keep buoyancy tight and treat the overhead section with respect.
About The Tunnel - Guam
The Tunnel - Guam is a northern boat dive on a cliff-line reef where a natural opening, surrounding caverns, and sand channels create a compact underwater passage rather than a wide-open drift. It suits divers who like clear water, good coral structure, and a tidy guided profile with steady buoyancy control, especially when the sea is calm enough for a simple run.
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Research Estimate At The Tunnel - Guam
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 12m
AccessSimple entry
CoralHealthy coral
Aquatic LifeGreat variety
FacilitiesGood facilities
Where Is The Tunnel - Guam?
This spotNearby spots
Community sourced coordinates.
The Tunnel - Guam Planning Details
Depth range, seasonality, and planning context.
Reported Depth
4.6m - 18.3m
Depth Note
Site listings put the reef around 15-20ft, while the tunnel opening starts near 35ft and exits near 45ft.
Best Season
Year-round in calm weather windows.
Typical Conditions
Clear-water reef diving with a natural tunnel, caverns, and sand channels. The profile is approachable but still benefits from controlled buoyancy and a calm sea state.
Safety & Access At The Tunnel - Guam
Hazards, restrictions, and access requirements.
Key Hazards
Overhead environmentRestricted access
Safety Notes
Treat it as a guided reef tunnel, keep your buoyancy neutral, and stay conservative around the overhead section and lionfish.
Access Restrictions
Boat access is the normal route. The tunnel is an overhead section, so plan it as a guided dive rather than an improvised swim-through.
Legal Notes
Follow your guide's overhead-environment procedures and stay within the training level that matches the site.
Local Intel For The Tunnel - Guam
Community notes to help plan your visit.
Scuba Diving
A reef dive with a natural tunnel, caverns, schooling fish, lionfish, and octopus.
Freediving
Not a casual freedive site because of the overhead section and the need for depth control.
Snorkeling
Not a snorkel site; the main feature sits below the surface and through the reef opening.
Wildlife at The Tunnel - Guam
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At The Tunnel - Guam
Community dive logs and visit reports for this site.
Dive Spot Log Averages At The Tunnel - Guam
Average conditions based on logged dives & visits.
Conditions
Avg. Visibility12m
Activity
No dive activity logged yet.
