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Destination guide

Guam

Wrecks from two world wars, a heart shaped blue hole, and tropical walls in the Western Pacific

Double wreck divingYear round water tempsProtected snorkel preserves
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Overview

Wrecks from two world wars, a heart shaped blue hole, and tropical walls in the Western Pacific

Guam blends accessible boat dives inside Apra Harbor with dramatic outer reef walls and historic wrecks. The island's dry season runs January to June, with July to November bringing more rain and the peak of typhoon risk. Water stays around 28°C and visibility often exceeds 30 m on walls like Blue Hole. Snorkelers love the Piti Bomb Holes and Tumon Bay marine preserves. Travel is straightforward via Antonio B. Won Pat International Airport, and U.S. entry rules apply. Expect American style convenience with Chamorro culture, plus daily dive charters from Cabras Marina.

Why Guam for water people

  • Two wrecks from different world wars lie side by side in Apra Harbor, creating a unique double wreck dive.
  • The island's signature Blue Hole drops from a plateau at 18 m to an opening near 38 m, then along a sheer wall.
  • Marine preserves at Tumon Bay and Piti Bomb Holes protect easy snorkel sites with schooling fish.

Marine setting and conditions

  • Leeward west coast offers calmer water most of the year. North and east coasts see stronger trade winds and surf.
  • Typical visibility: 20 m to 40 m on outer walls. Currents vary from mild to strong, especially at points and passes.

Access and operators

  • Daily boats run from Cabras Marina into Apra Harbor and out to the Orote Peninsula. Major operators include MDA Guam and GTDS.

Rules and etiquette

  • Guam Coral Reef Marine Preserves prohibit taking marine life, anchoring on coral, and harmful contact. Use mooring buoys and perfect buoyancy.
  • Inside Apra Harbor, observe port security zones and follow operator instructions for SMB use and pick ups.

Topside

  • Non divers can explore WWII history at War in the Pacific National Historical Park, watch sunsets from Two Lovers Point, and hike to overlooks like Cetti Bay.

Trip callouts

  • Double wreck diving

    Tokai Maru and SMS Cormoran sit adjacent in Apra Harbor, letting qualified divers visit wrecks from WWI and WWII on one dive.

  • Year round water temps

    Expect 27°C to 29°C with light exposure protection for most divers.

  • Protected snorkel preserves

    Tumon Bay and Piti Bomb Holes are easy entries with abundant reef fish for families and first timers.

Activity highlights

scuba

Why Guam for Scuba Diving

Blue HoleTokai MaruSMS CormoranOrote PeninsulaApra Harbor

Guam delivers signature walls, photogenic macro at pinnacles, and historically significant wrecks. Boats from Cabras Marina reach Apra Harbor reefs in minutes and outer wall sites like Blue Hole and Shark's Pit along the Orote Peninsula. Operators such as Micronesia Divers Association and Guam Tropical Dive Station run daily charters and training, with nitrox widely available.

freedive

Why Guam for Freediving

freedive wallline trainingApra Harbor

Clear warm water, short boat rides, and drop offs close to shore make Guam attractive for line training and exploration. Drift along the Orote Peninsula cliffs, practice technique over harbor bommies, and time sessions for leeward conditions in the dry season.

snorkel

Why Guam for Snorkeling

Piti Bomb HolesTumon Baymarine preserve

Marine preserves make for easy, fishy snorkels close to hotels and family facilities. Piti Bomb Holes hosts schooling reef fish near an observatory, while Tumon Bay is a calm lagoon with sandy entries and coral patches.

topside

What to do when you are not in the water

War in the PacificTwo Lovers PointValley of the LatteRitidian

Guam pairs war history with island vistas and village culture. Visit War in the Pacific National Historical Park at Asan and Agat, watch the sunset from Two Lovers Point, tour the Valley of the Latte by riverboat, and walk the pristine sands of Ritidian at the National Wildlife Refuge.

About these guides

DiveJourney destination guides are living documents built from local knowledge, operator experience, and publicly available sources. Conditions, regulations, and logistics can change. Each guide shows its last update date and sources used.

Last updated: October 30, 2025 • 34 sources

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