Scuba Diving and Snorkeling in Guam

Scuba Diving and Snorkeling in Guam

Scuba diving information in Guam

Guam is one of the best dive destinations in the world. Located just off the Marianas Trench, the deepest part of the ocean in the world, Guam offers divers exceptionally clear waters, unspoiled coral reefs and sheer walls, hundreds of varieties of coral and fish, and a number of World War II airplane and ship wrecks. A number of marine preserves have been established to protect Guam's undersea life which are open to divers and underwater photographers. Because of the island’s proximity to the Coral Triangle, Guam has the richest and most diverse coral reefs in the United States. More than 300 types of coral, 220 species of benthic marine algae and 950 species of coral reef fish live in the surrounding waters. Guam’s underwater world is home to several impressive sites. The Piti Bomb Holes are in reality collapsed underwater caves, filled with numerous tame fish. It is an excellent night dive. Blue Hole is a naturally formed tunnel that cuts into a sloping reef. Visibility is excellent. Coral Gardens is a reef with coral pillars, sandy flats and blocks of healthy coral reef. Apra Harbor is reportedly the only site in the world where wrecks from both world wars sit so close: the SMS Cormoran from WWI and the Tokai Maru from WWII. Guam’s warm waters are teaming with hundreds of varieties of colorful fish and coral species, a seascape of unimaginable beauty and clarity, dotted with historic wrecks. Guam’s open ocean is not only home to many diverse coral and marine life species; it’s also one of the region’s most affordable places to dive. Along with a number of dives fit for every level of diver, the tropical waters are warm year round. Oceans stay about 28°C and have up to 46 meters of excellent visibility. Diving environments are concentrated more heavily in the south, with the exception of a few accessible dive spots in the northern part of the island.

Geography and climate

Guam is an island in the western South Pacific Ocean, about three-quarters of the way from Hawaii to the Philippines. It is the southernmost island in the Mariana island chain and is also the largest island in Micronesia, with an area of 549 km². Guam is a territory of the United States of America. Guam enjoys a tropical marine climate: generally warm and humid, moderated by northeast trade winds. The dry season, which runs from January to June, provides the most pleasant weather, with slightly lower humidity. The rainy season is from July to December. There is little seasonal temperature variation, with an average low of 22°C and high of 30°C. During the rains, squalls are common, though destructive typhoons are rare.

Entry requirements

To enter Guam a valid passport and a visa are necessary, except for American Citizens and citizens of some countries, who can travel to Guam without a visa under the USA's Visa Waiver Program.

Health and safety

There are no mandatory vaccinations to enter Guam, although it is recommended to have the vaccinations for typhoid, hepatitis A and B, rabies, measles, malaria, rubeola, diphetheria and tetanus. Mosquitoes could be a problem, so cover up and use plenty of mosquito repellant. There are no serious security or safety concerns. Petty crime is prevalent.

Time zone



Few foreign mobile phone companies offer international roaming to Guam so double-check before leaving. Alternatively, you should be able to get a Pay-as-you-go SIM card from various locations. Wireless internet is available in nearly all coffee shops on the island.

Power and Electricity

110 Volts at 60 Hertz USA plug.

Scuba Diving locations in Guam

Which are the best scuba diving locations in Guam? Below, you will find a list of all locations of Guam, organized by regions, in which you can dive and snorkel.

Scuba diving locations and photos from each location in Guam

Which locations in Guam have underwater photos? Below, you will find the list of locations from Guam and for each location a list of underwater photos.

Marine Species and photos of each species in Guam

Which marine species can I observe in Guam? Below, you will find the list of marine species and the photos for each species.

Underwater Photographers and photos from each photographer with photos taken in Guam

Which photographers have taken underwater photos in Guam? Below, you will find the list of underwater photographers and their photos in Guam.

Scuba Diving centers in Guam

Which scuba diving centers can I dive with in Guam? Below, you can see the list of scuba diving centers in Guam. Click on “more info” to find out more about each scuba diving center.

There are no diving centers available

Liveaboards in Guam

Which liveaboard can I dive with in Guam? Below, you can see the list of liveaboard in Guam. Click on “more info” to find out more about each liveaboard.

There are no liveaboard available

Accommodation in Guam

Which accommodation can I rest after my dive in Guam? Below, you can see the list of accommodation in Guam. Click on “more info” to find out more about each accommodation.

There are no accommodation available