< Back

Contact us

Our scuba travel experts are available 24/7 to assist you in planning and booking a fantastic scuba diving vacation

Diving in Guam

Untouched by mass tourism, the remote Micronesian island of Guam is the perfect destination for divers ready for adventure. Expect WWI and WWII wrecks, colorful corals and plentiful marine life.

Diving in Guam

Quick facts

Diving in Guam is the ultimate adventure. With reefs and wrecks left untouched by mass tourism, Guam’s dive sites are a pristine playground. Here you will find something for every interest and every level of diver.

Guam is probably most famous for its wrecks. In fact, this is one of the only places in the world you can touch two wrecks at the same time. The German Cormoran from WWI and the Japanese Tokai Maru from WWII sank bow to stern and now lie at 100 feet (30 meters). Many other shipwrecks surround the island suiting both Open Water and Advanced divers. For beginners, the American Tanker in Apra Harbor sits at 50 feet (15 meters) and is now a flourishing artificial reef. Don’t miss your chance to take a photo with the American flag underwater.

While the shipwrecks may be of interest, Guam’s premier dive site is the Blue Hole. With crystal clear visibility, this dive starts at 60 feet (18 meters) and progresses to the cavern entrance at 115 feet (35 meters). The hole then drops to an unreachable 230 feet (70 meters). Look out for some large pelagic species including reef sharks and tuna on your dive into the depths.

The remainder of Guam’s dive sites are colorful reefs and walls which are accessible by both boat and shore dives. On some reef dives, the currents may be strong and dive masters will recommend the direction for a drift dive. 11-Mile Reef, Gab Gab, Cocos Island and Gun Beach are all popular dive sites for viewing some of Guam’s 1000 species of reef fish.

Guam’s climate is tropical, making diving possible year-round. September to December can be rainy while December to April is considered the windy season. However, water temperatures remain a constant 82-86°F (28°C). Guam is the perfect destination at any time of the year if you are looking for an unforgettable diving holiday filled with magnificent and uncrowded dive sites.

When to go

Rain and temperature

Click to expand

Water temperature

Click to expand

What to see

Guam’s equatorial warm waters attract all types of wildlife. On the biggest side of things, you might see spinner dolphins and pilot whales. Green sea turtles are making their way back into the area now that their eggs are no longer being collected. One might also come across reef sharks or tuna during a dive in the Blue Hole. Rays, octopus, eels, giant trevally, lion fish, colorful crabs, shrimp and christmas tree worms are likely to be seen closer to shore. Guam is also home to over 1000 species of fish and 375 species of coral, so expect an ultra-colorful dive every time you enter the water.


For better readability of the table, pass into the landscape mode.

Most likely sightingsPossible sightings


Officially considered the largest island geographically in Micronesia, Guam is the southern most island in the Mariana Islands archipelago. The island is between the Philippines and Hawaii in the Pacific Ocean. As remote as it may be, Guam is an American territory due to its strategic military importance.

Guam’s history began about 4,000 years ago when the Chamorros moved onto the island. In 1521, Ferdinand Magellan landed here while on expedition for Spain, and a Spanish colony was subsequently established in 1668. At this time, Catholic missionaries also landed on the island which is today approximately 85% Roman Catholic. For the next 200 years, Guam was a strategic stopping-off point for Spanish galleons crossing the Pacific. However, in 1898, Spain ceded the island of Guam to the United States as a result of the Spanish-American War. In 1941, Japan captured the island hours after the attacks on Pearl Harbor. Two and a half years later, the United States recaptured the island following intense fighting. Guam has remained an American territory since. Today, tourism makes up the majority of the economy followed closely by military operations.

While most of Guam is a veritable wonderland of lush nature, its position as a stop-over for trans-Pacific journeys hasn’t left the island without environmental troubles. Devastatingly, the mildly venomous brown tree snake was introduced to the island shortly after World War II. It is thought that the snake was a stowaway on a US military transport. Previous to the introduction of the brown tree snake, Guam was an island without snakes. Unfortunately, this single species has caused the total elimination of some endemic bird species including the Guam flycatcher and has created an island with a very low population of aviary species. With nothing to eat them, Guam, in turn, has 40 times more spiders than neighboring islands. With that said, the snakes are rarely seen during the day time and marine species have thrived under the protection of the US Environmental Protection Agency.

Other attractions

Guam is a great destination for the whole family. When you aren’t diving, you can expect a unique combination of beach and city atmosphere. The local markets are sure to be a delight for any visitor. The Chamorro Night Market is held every Wednesday night at the Chamorro Village in Agana. The Mangilao Night Market is held every Thursday night in front of the Santa Teresita Church in Mangilao. Divers traveling with non-diving family members should also check out the Fish Eye Marine Observatory in the Piti Bomb Holes Preserve. Guests can snorkel or look through underwater windows while scuba divers feed the fish below. Finally, a holiday to Micronesia isn’t complete without a day at the beach. Check out Gun Beach in the north of the island for the best atmosphere. You are sure to make memories that last a lifetime during your stay in Guam.

Getting there

Won Pat Guam International Airport (GUM) welcomes flights from Hawaii, Australia, Micronesia and much of Eastern Asia. Occasionally, cruise ships also arrive at the island during trans-Pacific cruises.

Once on the island, it is possible to get around by car, bus or your own two feet.


Time zone




Calling code

110 V

Electric volt



Plug type


Main airport
Note - Travel to any destination may be adversely affected by conditions including (but not limited) to security, entry and exit requirements, health conditions, local laws and culture, natural disasters and climate. Regardless of your destination, check your local travel advisory board or department for travel advice about that location when planning your trip and again shortly before you leave.

Save that favourite

With a PADI Travel account, you can favourite dive operators to come back to later on any device or computer

Log in or sign up