How deep is Blue Hole?

Blue Hole has a depth range of 15.2–40 metres (50–131 feet). Check the dive site page for current conditions and any depth-specific guidance before planning your dive.

Can beginners dive Blue Hole?

Blue Hole is rated as advanced difficulty, which may not suit new divers. A Advanced Open Water/deep experience for the standard route. Technical training and appropriate gas/redundancy are required for any plan below recreational limits or outside the guided route. certification or equivalent is suggested. Consider your experience level, conditions, and local guidance before planning.

What will I see at Blue Hole?

Divers at Blue Hole in United States commonly report sightings of anemonefish, blacktip reef sharks, green sea turtles, moray eels, and octopus. Marine life varies by season and conditions—check the site page for recent diver observations and photos.

Add the first photo

AdvancedBoat entry

Blue Hole

Q: When is the best time to dive Blue Hole?

The best time to dive Blue Hole is typically Use a calm-weather, low-current window selected by local operators; avoid strong afternoon/current conditions.. Conditions vary, so check the latest reports and forecasts on the dive site page before your trip.

Guam, United States

AOW suggested15–40 m depthBoat entryRash guard or 2mm shorty typical

Boat dive — see Entry & access.

Blue Hole at a glance

Blue Hole is a advanced boat dive site in Guam, United States with depths of 15.2–40 m (50–131 ft). Typically most favorable Jun · from 3 years of archive data. Divers commonly see anemonefish, blacktip reef sharks, and green sea turtles. Recent reports put the water around 30°C (85°F). Check the latest conditions and entry details before you go.

Marine model · graded 4h ago

0.9 mwaves — under a meter expected

Tap a factor for its source and model point · Forecast 30°C · seasonal avg 30°C

Site hazards: Deep shaft, easy accidental over-depth, narcosis, strong current/drift exposure, brief overhead/cavern-like route, wall drop-off beyond recreational limits, boat pickup, and military/restricted shoreline nearby.

Read the full hazards ↓

Dive windows this week

Best: Tue

Sun—

Mon7:00–19:00

Tue7:00–19:00

Wed7:00–19:00

Thu7:00–19:00

Fri7:00–19:00

Sat7:00–19:00

Favorable windowModerate window— no window

First light 5:42 · Sunrise 6:05 · Sunset 18:51

Source: Open-Meteo marine · model point 6.8 km from site · graded 4h ago

Forecast only — always assess conditions on site.

Forecast · NOAA tide model

Tide & slack timing

Recent diver reports

Dated firsthand observations from divers — not current conditions.

No diver reports for this site yet. — one dated observation helps every diver after you.

What Divers Say

Best time: Use a calm-weather, low-current window selected by local operators; avoid strong afternoon/current conditions.

Based on community reviews and site data. Conditions vary — always verify before diving.

Best months, historically

What conditions have historically been typical at this site, month by month — not a forecast.

Jan11%29°C2.2 m
Feb1%28°C2.2 m
Mar32%28°C1.9 m
Apr54%29°C1.5 m
May73%29°C1.5 m
Jun87%30°C1.1 m
Jul78%30°C1.3 m
Aug71%30°C1.3 m
Sep73%30°C1.4 m
Oct55%30°C1.6 m
Nov22%29°C1.8 m
Dec10%29°C2.0 m

June hastypically had the largest share of favorable days here. Conditions vary year to year — this is historical context, not a forecast.

Based on 3 years of archive data. Bar height shows the share of days each month whose conditions have historically scored favorably.

Marine life recorded at this site, by month

Recorded observations — evidence of past sightings, not a promise of what you’ll encounter.

Species seen here

anemonefishOccasionally seen
blacktip reef sharksOccasionally seen
green sea turtlesOccasionally seen
moray eelsOccasionally seen
octopusOccasionally seen
snapperOccasionally seen

Carcharhinus limbatus recorded here Apr (1 record)
most recent 2012
Chelonia mydas recorded here Apr (1 record)
most recent 2012
Gymnothorax flavimarginatus recorded here Apr (1 record)
most recent 2012
Myliobatis aquila recorded here May (1 record)
most recent 2013
Triaenodon obesus recorded here May (1 record)
most recent 2013

Counts are occurrence records near this site from public biodiversity datasets (GBIF), grouped by calendar month across all sampled years. Sightings vary — past records are context, not a prediction.

Fills & rentals nearby

Facts from OpenStreetMap, corrected by the community — listed by distance only. Details change; confirm with the shop.

MDA (Piti Shop)9.4 km
Report a fix

Shop facts come from OpenStreetMap and community corrections, shown nearest first. PickADive lists facts and contacts only — no listing is sponsored or ranked.

Site details

Natural shaft/sinkhole off Orote Point, normally dived from a boat. Divers enter the opening on the reef top, descend through the blue-water shaft, and exit onto the outside wall near the recreational depth limit. The bottom continues far beyond recreational limits, so depth control is the central planning issue.

boatcavewall

Deep shaft, easy accidental over-depth, narcosis, strong current/drift exposure, brief overhead/cavern-like route, wall drop-off beyond recreational limits, boat pickup, and military/restricted shoreline nearby.

Reviews

No reviews yet — this site is waiting for its first. Dived here? Your rating and a few lines help the next diver.

Spot something off?

Help keep this listing accurate for the next diver.