Dive sites in Guam

Resting against the inside of the Glass Breakwater in Apra Harbor, the American Tanker is a concrete-hulled barge sunk shortly after World War II. The structure sits upright on a sloping seabed, allowing divers to inspect cargo holds, open deck machinery, and the large rudder assembly. Sheltered harbor waters provide calm diving conditions year-round, making the upper decks accessible to recreational divers while technical penetration into lower compartments remains an option for trained wreck divers.

Situated along the limestone walls of western Guam, Amphitheater is a dramatic natural cavern formation carved into the reef face. Divers descend along a vertical drop-off to explore a semi-circular recess featuring wide overhangs, rocky shelves, and sandy patches. The site offers excellent ambient light penetration at the entrance, transitioning into shaded crevices where macro critters and sheltering fish congregate.

Located in Agat Bay off the western coast of Guam, this site features a sunken World War II Landing Vehicle Tracked (LVT), commonly called an Amtrac or Amtrak. Sunk during the liberation of Guam, the tracked amphibious vehicle rests upright on a white sand plain surrounded by scattered patch reefs and hard coral outcroppings.

Located inside Apra Harbor, this site features a sunken World War II barge resting against a sloping coral reef. The sheltered harbor location keeps sea conditions calm throughout most of the year, making it a reliable spot when outer ocean swells pick up. Corals have heavily colonized the barge hull and surrounding bommies, turning the structure into an artificial habitat.

Located off the rugged limestone cliffs of western Guam, Barracuda Rock features dramatic volcanic and coral formations that plunge toward the ocean floor. Divers descend along stepped reef terraces and rocky ledges undercut by surge channels and small caverns. Clear oceanic water frequently sweeps past the promontory, attracting pelagic predators that cruise along the drop-off while macro critters find shelter inside crevices along the rock face.

Situated along the outer reef near the entrance to Apra Harbor, Blue and White offers a mix of hard coral formations, gentle sand flats, and outer drop-offs. The site takes its name from nearby navigational markers that guide vessels past the reef line. Divers commonly encounter sea turtles resting among massive Porites coral heads and schooling reef fish feeding in the coastal current.

Guam's signature natural formation features a vertical limestone shaft opening on a shallow coral plateau off Orote Point. Divers descend straight down the natural chimney into clear ambient light before exiting through a massive natural archway onto the open ocean wall. The sheer vertical drop-off outside plunges into the abyss, offering views into deep cobalt water where pelagic species cruise past.

Situated along Guam's sheltered southwestern coastline in Agat Bay, Coral Gardens features sprawling fields of massive Porites and delicate branching corals interspersed with white sand channels. The gentle reef slope provides an easy navigation path, making it popular for photography, training, and relaxed exploration.

Located inside Guam's sheltered Apra Harbor, Finger Reef is a long coral ridge that extends like an outstretched digit from the harbor wall toward the deeper sandy floor. Large colonies of Porites and finger corals blanket the top of the formation, stepping down gentle slopes to meet fine sand. Because the site sits well within the harbor's protective breakwater, sea conditions remain calm throughout most of the year, making it a reliable spot when outer ocean swells pick up.

Located in Piti Bomb Holes Marine Preserve, this site centers around a natural sinkhole depression in the reef flat adjacent to the Fish Eye Underwater Observatory. Divers share the water with snorkelers and observatory visitors observing through subterranean windows. Sand channels meander between dense Porites coral heads, forming a sheltered basin that stays calm during prevailing trade winds.

Situated along the calm coastline of Apra Harbor, Gab Gab features an easy entry point leading to a vibrant sloping hard coral reef. A series of coral heads rise up along the drop-off, providing habitat for territorial damselfish and resting green sea turtles. Because Apra Harbor buffers open ocean swell, surface conditions remain unusually calm year-round, making it a staple site for training dives and relaxed reef exploration.

Gab Gab II sits inside the sheltered confines of Apra Harbor, characterized by large coral mounds that rise from a sandy seafloor. Long associated with local submarine tours and dive operations, the site attracts resident fish that approach divers without hesitation. Hard coral cover spreads across the bommies, providing shelter for reef fish and cleaning stations.

Located off the coast of Agat, Hap's Reef features a series of coral bommies and sprawling hard-coral formations rising from a flat sandy bottom. Named after a legendary local dive pioneer, the site is known for dense concentrations of reef fish and clean coral structures that provide shelter for macro critters and resting pelagics.

Harley Reef sits in the protected waters of Apra Harbor, centered around a vintage Harley-Davidson motorcycle resting on the sea floor. Surrounding the submerged bike are scattered hard coral formations, Porites bommies, and gently sloping sandy patches that provide habitat for small macro critters and cruising reef dwellers. The calm harbor environment ensures easy navigation, making it a favorite for relaxed photography sessions and training dives.

Located along the inner waters of Apra Harbor on Guam, Outhouse Beach serves as a primary site for open water checkouts, training, and easy night dives. The entry is a walk across a coarse sand beach into sheltered water protected by the harbor breakwater. Underwater, the topography features a gently sloping sandy bottom interspersed with scattered coral heads, anemone colonies, and discarded harbor debris that has formed artificial reef habitat.

Located within Apra Harbor, SeaBee Junkyard is an underwater relic field created after World War II when US Navy construction battalions discarded heavy machinery and surplus materials offshore. Divers navigate past bulldozers, pipes, structural beams, and vehicle frames that have transformed into artificial reef structures. Hard corals and sponge colonies encrust the weathered metal chassis, offering sheltered habitats across a sloping seabed.

Located along Guam's western coast near Orote, Shark's Pit is an offshore drop-off centered around a dramatic sandy bowl and coral plateau. Divers descend along coral ridges that plunge into deeper blue water, where pelagic species cruise alongside resident bottom-dwellers. Oceanic currents sweep past the point, bringing clean water and steady pelagic action.

Resting on the floor of Apra Harbor, the SMS Cormoran is an auxiliary cruiser scuttled by its German crew in April 1917 to avoid capture by American forces upon the United States entry into World War I. The vessel lies on its starboard side right beside the Tokai Maru, an armed Japanese freighter sunk during World War II. Divers can touch both historic wrecks simultaneously along their point of contact. While the hull has deteriorated over decades of immersion, major structures including the engine room skylights, deck hardware, and interior compartments remain accessible for trained divers navigating the harbor waters.

Resting inside Apra Harbor, the Tokai Maru is an intact Japanese passenger-cargo freighter sunk during World War II. The ship settled directly against the SMS Cormoran II, a scuttled German merchant raider from World War I. Touching both wrecks simultaneously is a unique underwater historical encounter.

Tumon Bay is protected as a marine preserve along Guam's western coast. While the inner lagoon remains a shallow training area and snorkeling hub, scuba diving takes place along the outer barrier reef where spur-and-groove coral formations slope toward deeper oceanic waters. Hard coral growth flourishes across the outer drop-off, providing shelter for reef sharks, sea turtles, and passing pelagics.

Resting upside down on a coral-strewn slope inside Apra Harbor, the Val Bomber is the wreckage of a World War II Japanese Aichi D3A carrier-borne dive bomber. Divers can inspect the exposed radial engine, propeller blades, and fixed landing gear spats that remain intact despite decades on the seabed. Surrounding coral heads host reef fish, while the metal airframe provides shelter for cryptic macro critters.

Western Shoals rises from the sandy floor of Apra Harbor, forming a coral mound topped with massive hard coral formations. Because the site sits within the sheltered harbor waters, it remains largely protected from heavy open-ocean swells. Divers navigate around towering porites coral heads, investigate deep crevices, and observe cleaning stations where reef fish queue up for cleaner wrasses.