Reef
down to 40 m
Gun Beach
Shore dive through a cable trench to the outer reef, where green turtles are common and eagle rays glide past the drop-off.
- Advanced
- Manta rays
Experienced≤40 m
Blue Hole
Dive site in Guam
A vertical shaft from 18 m with a window onto the wall at about 40 m, and visibility that can reach 30 m or more.
- Usual dive
- 41 m
- Deepest point
- 91 m
- Level
- Experienced
- Best months
- Apr–Aug
- Entry
- By boat
- Current
- Strong
The story
The Blue Hole is a vertical shaft whose entry begins at 60 feet and drops past 300 feet. At 130 feet a window opens onto the wall.
Source: world.dan.org
The dive
A blue hole and wall dive from a boat. Known for whale sharks, blacktip reef sharks and reef sharks.
Who it's for
Experienced≤40 mSource: guamdiveguide.com
Recommended minimum: Experienced (Deep Specialty, N3).
- DepthThe usual dive goes deeper than lower certifications allow.
- CurrentCurrent can be strong; you need good air management and buoyancy.
- OverheadPart of the dive is under a ceiling, without a direct way up.
- Strong current: dive with a local guide and carry a surface marker buoy.
- The site goes deeper than 40 m: Experienced divers stay above 40 m.
Conditions
- Dive type
- Blue hole, Wall
- Environment
- Cavern (daylight visible)
- Water
- Sea water
What you might see
- Whale sharks
- Blacktip reef sharks
- Reef sharks
- Pilot whale
- Turtles
- Eagle rays
- Tuna
- Barracuda
- Flashlight fish
- Lionfish
- Moray eels
Season in Guam
- J
- F
- M
- A
- M
- J
- J
- A
- S
- O
- N
- D
- Best
- Good
- Possible
- Closed
- Not documented yet
Best months: Apr–Aug.
Source: diveadventures.com.auPrices in Guam
- One dive
- €78–81
- Try dive
- €72
- Open Water course
- €303–448
Prices found at the area's dive centres, not specific to this site. Details and sources
Where is Guam?
The point shows the Guam area, not the exact dive site.
More dives in Guam
Reef
down to 30 m
Gab Gab II
- Advanced
- Nurse sharks
Reef
down to 11 m
Piti Bomb Holes (Fish Eye)
- Open Water
- Blacktip reef sharks
Wreck
down to 40 m
SMS Cormoran
German WWI transport scuttled in 1917 in Apra Harbor, now lying beside a WWII Japanese freighter.
- Experienced
Wreck
down to 37 m
Tokai Maru
A 1943 Japanese freighter lying against a WWI German ship: the only known site where wrecks from both world wars touch.
- Advanced
- Turtles
Reef
down to 21 m
Western Shoals
Apra Harbor reef whose top is covered with vast staghorn coral colonies home to thousands of small reef fish.
- Open Water
About this page
Values marked “Estimated” come from our original catalogue and are being checked against published sources one by one. Sourced values link to where they come from. Conditions change with the season, the weather and the tide: confirm with a local dive centre before you dive.