What are the Must See Snorkeling Spots of Guam?

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Expert: Cameron – I have been snorkeling for over two decades and have a certification with the Professional Association of Diving Instructors. I have traveled throughout many exotic marine locations and have been to Guam for months at a time.

When it comes to exploring the vibrant underwater world of Guam’s coral reefs, there are several outstanding snorkeling sites that offer breathtaking experiences.

While there are some that require military access to get to these good snorkel spots, not all do.

Let’s dive into the top snorkeling destinations in the Pacific paradise of Guam.

Best Snorkeling Sites in Guam’s Coral Reefs

Check out this article for 4 other amazing snorkeling locations around the world.

Tumon Bay

Tumon Bay Beach

Click here for directions to Tumon Bay.

Tumon Bay is a popular snorkeling spot known for its crystal-clear waters and abundant marine life.

Located on the western coast of Guam, this bay is easily accessible and offers snorkelers a chance to witness colorful coral formations and a diverse array of fish species.

The calm and shallow waters of Tumon Bay make it an ideal location for beginners and families.

Apra Harbor

Apra Harbor Guam

Click here for directions to Apra Harbor.

Apra Harbor, situated on the western side of Guam, boasts a unique snorkeling experience.

Another name you might hear is the ‘Bomb Holes.’

As one of the largest deep-water harbors in the Pacific, it is home to diverse marine life and fascinating underwater structures.

Also home to the Piti Bomb Holes Marine Preserve, who’s website can be found here.

Snorkelers can explore the coral reefs, swim alongside tropical fish, and even encounter sea turtles in this enchanting underwater realm.

Gab Gab Beach

Sea Turtle Murky Water

Click here for directions to Gab Gab Beach.

Gab Gab Beach, located on the southeastern coast of Guam, offers snorkelers a chance to immerse themselves in a tranquil and picturesque environment.

The beach’s calm waters and thriving coral formations make it a perfect spot for snorkeling enthusiasts.

Snorkelers can expect encounters with colorful reef fish, sea cucumbers, and various coral species while exploring the underwater wonders of Gab Gab Beach to include sea turtles.

This is where I encountered my first sea turtle in fact!

The entrance to the water is a large concreate enclosure, which is a few meters deep, and makes it easy to head into the water with your snorkel gear.

This location is on the ‘Big Navy’ naval station and is blocked from non US military personnel.

Gun Beach

Gun Beach Guam

Click here for directions to Gun Beach.

Gun Beach, situated in Tumon Bay, is another fantastic snorkeling destination in Guam.

With its vibrant coral gardens and an abundance of marine life, Gun Beach provides an unforgettable snorkeling experience.

Snorkelers can observe vibrant corals, spot numerous fish species darting through the water, and even come across fascinating creatures like moray eels and sea urchins.

Be cautious while snorkeling here, the coral is quite close to the surface of the waters and you could easily find yourself scraping against the coral with the wake.

Overview of Guam’s Coral Reefs

Snorkeler in Vibrant Ocean

Location and geography of Guam

Guam is an island territory located in the western Pacific Ocean.

It is the largest island in Micronesia and is known for its stunning landscapes, white sandy beaches, and pristine coral reefs.

Surrounded by warm tropical waters, Guam’s geographical location makes it a paradise for snorkelers and divers alike.

The mountainous terrain also offers the chance to view waterfalls from a moderate hike into the tropical forests.

We did not make it to the waterfall that we intended to, however we made it to a fresh water runoff that had a rope swing and diving rock.

Coral Reef ecosystems in Guam

Guam is blessed with an extensive network of coral reef ecosystems, covering a vast area around the island.

These reefs are teeming with life and exhibit a remarkable diversity of coral species.

The thriving ecosystem supports a wide array of marine life, including colorful fish, sea turtles, rays, and various invertebrates.

Snorkeling in Guam allows visitors to witness the remarkable beauty and biodiversity of these underwater habitats.

Biodiversity in Guam’s Coral Reefs

Rich marine life and coral species

Guam Octopus

The coral reefs of Guam are home to a rich variety of marine life.

The photo above is a baby octopus I found living in an old rusty beer can I was throwing away.

Snorkelers can expect to encounter a colorful array of reef fish, such as butterflyfish, angelfish, and parrotfish.

The reefs are also adorned with stunning coral formations, including brain corals, staghorn corals, and table corals.

These vibrant and diverse ecosystems create a mesmerizing underwater landscape.

Endangered species found in Guam’s Coral Reefs

Guam’s coral reefs are not only a haven for common marine species but also serve as critical habitats for endangered species.

Snorkelers may have the incredible opportunity to spot endangered creatures such as hawksbill turtles, which are known for their stunning shells and graceful presence.

Hawksbill Sea Turtle

Guam’s Coral Reefs also provide refuge for the Guam Micronesian kingfisher, a bird species that is on the brink of extinction.

This bird was nearly wiped out from the brown tree snakes that are non native inhabitants to the island according to Science Alert.

Threats to Guam’s Coral Reefs

Coral and Fish

Despite their beauty and significance, Guam’s coral reefs face several threats that endanger their existence.

Understanding these threats is crucial for their conservation and preservation.

Let’s explore the main challenges faced by Guam’s coral reefs:

Climate change and coral bleaching

Climate change poses a significant threat to Guam’s coral reefs.

Rising sea temperatures, as a result of global warming, can lead to coral bleaching.

When corals are exposed to prolonged high temperatures, they expel the colorful algae living within their tissues, causing them to turn pale or white.

If the stress persists, the corals can die.

Climate change mitigation and reducing carbon emissions are essential for protecting Guam’s coral reefs from the devastating effects of bleaching events.

Overfishing and destructive fishing practices

Overfishing and destructive fishing practices can have detrimental effects on coral reef ecosystems.

Unsustainable fishing practices, such as using dynamite or cyanide, not only harm fish populations but also cause physical damage to the coral structures.

Implementing responsible fishing regulations and promoting sustainable fishing practices are vital to maintaining the delicate balance of Guam’s coral reef ecosystems.

Pollution and sedimentation

Pollution from various sources, including coastal development, sewage discharge, and agricultural runoff, can introduce harmful substances into the marine environment.

Chemical pollutants and excessive nutrients can negatively impact coral health and contribute to the growth of harmful algal blooms.

Additionally, sedimentation resulting from land erosion can smother corals, impeding their growth and reproduction.

Efforts to reduce pollution and promote sustainable land use practices are crucial for safeguarding the health of Guam’s coral reefs.

Conservation Efforts in Guam

Recognizing the importance of preserving Guam’s coral reefs, both the government and local communities have taken active measures to protect these fragile ecosystems.

Some notable conservation initiatives include:

Government initiatives and marine protected areas

The government of Guam has implemented various initiatives to protect its coral reefs.

Marine protected areas (MPAs), such as the Piti Bomb Holes Marine Preserve and the War in the Pacific National Historical Park, help conserve and manage the reefs’ resources.

These protected areas serve as sanctuaries for marine life, allowing them to thrive and recover from human-induced disturbances.

Community involvement and conservation organizations

Local communities in Guam actively engage in conservation efforts to protect the coral reefs.

Numerous organizations, such as the Guam Nature Alliance and the Micronesia Conservation Trust, work tirelessly to raise awareness, conduct research, and implement conservation projects.

Community-led initiatives, including beach clean-ups and educational programs, play a crucial role in fostering a sense of stewardship and promoting sustainable practices among residents and visitors.

Check out this article to see 7 ways to promote environmental awareness while snorkeling.

Snorkeling Tips and Safety Guidelines

Before embarking on a snorkeling adventure in Guam, it’s essential to prioritize safety and follow these guidelines:

PADI certifications and training

Underwater Seaplane Wreck

While snorkeling does not require extensive training, obtaining a PADI certification or participating in a snorkeling course can provide valuable knowledge and enhance your overall snorkeling experience.

These programs teach essential skills, safety procedures, and responsible snorkeling practices.

More importantly Guam is one of the cheapest places in the world to obtain a PADI diving certification.

This certification is well known and will allow you to dive anywhere a certification is required.

Equipment essentials for snorkeling in Guam

To enjoy snorkeling in Guam’s coral reefs, it’s important to have the right equipment.

Essential items include a well-fitting snorkel mask that provides a clear view underwater, a snorkel tube for breathing, comfortable fins for efficient swimming, and a buoyancy aid or life jacket for added safety, especially for inexperienced swimmers.

Check out this article to see what equipment you will need to snorkel.

Snorkeling planning and safety protocols

Before snorkeling, it’s crucial to plan your outing. Check weather conditions, tides, and currents to ensure safe snorkeling conditions.

Snorkel with a buddy, stay within designated areas, and avoid touching or stepping on corals to prevent damage.

Additionally, be mindful of marine life and maintain a respectful distance to avoid disturbing the delicate ecosystem.

Other Activities in Guam

Aside from snorkeling, Guam offers a plethora of activities to complement your coral reef exploration:

Exploring Guam’s beaches and cultural heritage

Guam’s stunning beaches are worth exploring, whether for sunbathing, swimming, or simply enjoying the picturesque surroundings.

Take a leisurely stroll along the sandy shores, admire the turquoise waters, and immerse yourself in the local culture.

Visit historical sites like the Latte Stone Park or the Guam Museum to learn about Guam’s rich heritage and Chamorro culture.

Water sports and recreational activities

For those seeking adventure, Guam offers a wide range of water sports and recreational activities.

Engage in thrilling experiences such as jet skiing, kayaking, paddleboarding, or even parasailing.

These activities allow you to appreciate Guam’s natural beauty from a different perspective while enjoying the excitement of aquatic adventures.


Snorkeling the coral reefs of Guam is an awe-inspiring experience that allows you to connect with the wonders of the underwater world. It is essential to approach this activity responsibly and with a commitment to conservation.

By understanding the best snorkeling sites, the biodiversity of Guam’s coral reefs, the threats they face, and the conservation efforts in place, you can contribute to the preservation of these precious ecosystems.

Embrace the opportunity to explore the vibrant marine life, encounter endangered species, and witness the breathtaking beauty of Guam’s coral reefs.

Let’s encourage responsible tourism, spread awareness about the importance of coral reef conservation, and work together to ensure that future generations can continue to marvel at the wonders that lie beneath the surface of Guam’s crystal-clear waters.

Snorkeling in Guam is not just an adventure; it’s an invitation to appreciate and protect our invaluable natural treasures.

[Sources and References]

McRae, Mike. “Guam’s Plague of Snakes Is Devastating the Whole Island Ecosystem, Even the Trees.” ScienceAlert, 9 Mar. 2017, www.sciencealert.com/guam-s-plague-of-snakes-is-having-a-devastating-impact-on-the-trees.

[Image Attribution and Licensing]

#1 Image by minjung84
#2 Image by David Mark
#3 Image by JUYOUNG SUNG
#4 Image by Kanenori
#5 Image by Lisa
#6 Image by Arhnue Tan