Big Blue

Type:

Scuba Diving

Entry:⚓Boat Entry

Difficulty:Intermediate

Tags:

ReefWall

About This Dive Spot

Big Blue is a curved, sloping reef that starts near the surface and drops beyond 130 ft, known for colorful hard corals and consistently good visibility. It’s described as a popular site for beginner divers while still offering enough depth and marine life to interest advanced to expert divers. Divers commonly see rays, schools of barracuda, turtles, and a variety of reef fish, with pufferfish frequently reported. Blacktip sharks are often spotted in the shallows.

Planning details

Reported depth and seasonality.

Depth note

Sloping reef extends from near the surface to 130’+ (about 40 m+).

Typical conditions

Great visibility is commonly reported.

Safety & access

Hazards, restrictions, and required precautions.

Hazards

Dangerous wildlife

Safety notes

Depth extends beyond 130 ft; plan appropriate limits. Blacktip sharks are commonly seen in shallow areas.

Local intel

Community notes to help plan your visit.

Tailored notes for different activities.

Scuba

Suitable for beginners, with depth and variety that can also appeal to advanced to expert divers.

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Spots Near Big Blue

📍 2.3 km

Palace Wall

🏖️

Palace Wall is a reef-wall site near the former Palace Hotel, known for its deep wall that appeals to technical divers while also offering shallow reef flats that suit a wide range of experience levels. The deep wall can attract pelagic life, and manta sightings are possible. Hard and soft corals support abundant reef fish, and turtles are commonly seen. Conditions are best in summer when seas are calmer, and the site can be accessed from shore with a long walk and surface swim.

📍 2.6 km

Gun Beach

🏖️

Located in North Tumon Bay within the Tumon Marine Preserve, this site is known for healthy coral growth and a high abundance of reef fish. The reef features hard and soft corals along with numerous sea anemones. It is home to several turtles and is also visited by manta rays, with shallow depths suitable for relaxed reef diving.

📍 2.9 km

Fai Fai

⚓

This site is typically dived as a boat drift, ending near a beach exit. It’s generally considered an easy dive for divers of most experience levels on most days. Divers often see green and hawksbill turtles along with a variety of reef fish. Rays may be encountered, and spinner dolphins are sometimes seen; manta rays are reported seasonally in spring and fall.

📍 9.7 km

The Pinnacle - Guam

⚓

A deep-water reef pinnacle with its shallowest point around 120 ft, featuring sea fans at both ends. The site is known for encounters with schooling barracuda and other large pelagic fish. Currents can be present and the dive is described as very advanced, suited to experienced deep or technical certified divers. Access is by boat and is dependent on calm sea conditions.

📍 10.9 km

Double Reef - Guam

⚓

Double Reef is a northern boat-only site featuring a coral reef with clear water and pronounced coral formations. Depth ranges from about 10 to 70 ft, with schooling reef fish commonly seen. It’s described as very easy for divers and snorkelers, and is typically visited in summer when winds and seas are calm. Spinner dolphins are often in the area in the mornings, with occasional pelagic sightings.

📍 11.9 km

Piti Channel

🏖️

Piti Channel is a natural channel dive accessed from shore, starting near the Cabras Power Plant. Runoff from the plant is described as creating warmer water that supports crustaceans. Currents can be very strong and the site is described as an advanced dive that requires caution.

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Frequently Asked Questions

What's the best entry point at Big Blue?

Entry at Big Blue is detailed in the spot description above. Look for specific landmarks, access paths, and any tide or condition requirements. Local divers often share updated entry tips in their dive logs.

What conditions are best for diving Big Blue?

Optimal conditions at Big Blue depend on several factors including tide, wind, and season. Check recent dive logs for current condition reports and patterns. Generally, calmer seas and high tide provide better visibility and easier entry.

What is the maximum depth and typical visibility at Big Blue?

Depth and visibility information for Big Blue can be found in the spot details and recent dive logs. Conditions can vary significantly based on weather, tide, and season. Always plan your dive according to current conditions and your certification level.

Are there any safety considerations or local etiquette at Big Blue?

When diving Big Blue, respect local regulations, marine life, and other water users. Be aware of any specific hazards like currents or boat traffic mentioned in the spot description. Follow Leave No Trace principles and local diving etiquette.