Is Great Blue Hole a shore dive or a boat dive?

Great Blue Hole is a boat dive — access is by boat rather than from shore. The entry is recorded as a giant-stride entry. The entry area is recorded as sheltered from surge. No facilities are recorded at the site, and cell service is recorded as good. Entry details and parking notes, where known, are listed in the access section of this page.

What will I see at Great Blue Hole?

Divers at Great Blue Hole in Belize commonly report sightings of Hawksbill turtle, Nurse shark, Horse-eye jack, Blacktip shark, and Midnight parrotfish. Nurse shark is recorded as common sightings, while Hawksbill turtle, Horse-eye jack, Blacktip shark, and Midnight parrotfish are reported only occasionally. Marine life varies by season and conditions—check the site page for recent diver observations and photos.

AdvancedBoat entry

Great Blue Hole

Lighthouse Reef, Belize

AOW suggested12–40 m depthBoat entryRash guard or 2mm shorty typical

Boat dive — see Entry & access.

Great Blue Hole at a glance

Great Blue Hole is an advanced boat dive site in Lighthouse Reef, Belize with depths of 12–40 m (39–131 ft). Typically most favorable Aug · from 3 years of archive data. Divers commonly see Hawksbill turtle, Nurse shark, and Horse-eye jack. Recent reports put the water around 30°C (86°F). Check the latest conditions and entry details before you go.

Marine model · graded 1h ago

0.8 mwaves — under a meter expected

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

Site hazards: Depth and narcosis, short no-decompression time, offshore boat logistics, blue-water ascent discipline, dark or deep water, gas planning, and remote-site weather exposure.

Read the full hazards ↓

Dive windows this week

Best: Thu

Fri12:00–18:00

Sat6:00–18:00

Sun11:00–17:00

Mon6:00–17:00

Tue6:00–18:00

Wed6:00–18:00

Thu6:00–18:00

Favorable windowModerate window— no window

First light 5:16 · Sunrise 5:37 · Sunset 17:55

Source: Open-Meteo marine · model point 2.7 km from site · graded 1h ago

Forecast only — always assess conditions on site.

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.

Dived here today — did the forecast match?

What Divers Say

Known for: Nurse shark, Caribbean reef shark, Bermuda chub

Best time: Plan through a Belize operator or liveaboard on a calm offshore weather window; confirm maximum depth, dive order, sea state, visibility, and backup sites locally.

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.

Jan59%27°C1.4 m
Feb55%27°C1.4 m
Mar53%28°C1.4 m
Apr58%28°C1.4 m
May53%29°C1.3 m
Jun50%30°C1.3 m
Jul60%29°C1.2 m
Aug94%30°C0.8 m
Sep93%30°C0.8 m
Oct77%30°C1.0 m
Nov72%29°C1.3 m
Dec58%28°C1.4 m

August 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

Carcharhinus perezii recorded here Apr, Aug–Sep, Nov (4 records)
most recent 2015
Scarus vetula recorded here May–Jun (3 records)
most recent 2017
Acanthemblemaria spinosa recorded here Jun (2 records)
most recent 2017
Acanthurus chirurgus recorded here Jun (2 records)
most recent 2017
Aplysina fistularis recorded here Jun (2 records)
most recent 2017
Cephalopholis cruentata recorded here Jun (2 records)
most recent 2017
Coenobita clypeatus recorded here Jun (2 records)
most recent 2017
Colpophyllia natans recorded here Jun (2 records)
most recent 2017

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.

The underwater calendar

When these animals are most recorded around Caribbean & Bahamas — from open sighting data, not a promise.

Bull sharkFebruary

Watch the whole year animate on the Migrations map

Fills & rentals nearby

No dive shops mapped within 25 km. Know one? Add it to the map.

Featured Belize dive guide

Great Blue Hole Belize dive guide

The Great Blue Hole is the Belize dive site people research first, but it is not a casual reef dive. Use this guide to understand the Lighthouse Reef setting, deep profile, stalactite ledge, operator logistics, and why the dive should be planned conservatively with local guidance.

Open map Check conditions Compare nearby sites Read reviews

PickADive guides and forecast windows are planning context, not a safety clearance. Confirm current conditions, rules, training limits, and operator guidance before diving — the decision is yours.

Difficulty: Advanced profile; Depth and offshore logistics require conservative planning.
Access: Boat dive; Usually reached as a Lighthouse Reef day trip or liveaboard stop.
Best for: Geology and scale
Planning note: Verify locally; Use this as research, not a same-day safety decision.
Depth: 12-40m; Confirm your plan against current conditions and training.
Best time: See timing notes; Plan through a Belize operator or liveaboard on a calm offshore weather window; confirm maximum depth, dive order, sea state, visibility, and backup sites locally.

Why dive Great Blue Hole

Great Blue Hole needs more context than a bucket-list photo can provide. Divers should understand that the famous experience is a deep, short, atmospheric sinkhole dive, while the best overall day often comes from pairing it with shallower Lighthouse Reef wall and reef dives.

How to dive it

Plan it as a boat dive with an established Belize operator. Ask about departure point, crossing time, maximum planned depth, gas and no-decompression limits, surface interval plan, weather backup, and which shallower Lighthouse Reef sites are included after the Blue Hole profile.

Marine life and site character

The Blue Hole itself is usually researched for geology, scale, and the ancient stalactite overhang rather than dense reef life. Expect the stronger marine-life value to come from nearby Lighthouse Reef sites visited on the same trip.

Best season and conditions

Choose the operator and weather window, not only a calendar month. Sea state, wind, crossing comfort, visibility, and the planned sequence of dives matter. If the offshore crossing or deep profile does not fit the day or the diver, choose a shallower Belize reef alternative.

Hazards and diver readiness

Depth, narcosis, short no-decompression time, overhead-looking formations, blue-water ascent discipline, boat logistics, and remote location are the main concerns. PickADive is a research aid only; local operators and same-day conditions decide whether the trip should run.

Local tips

Many divers remember the overall Lighthouse Reef day more than the Blue Hole descent alone. Compare Half Moon Caye, wall dives, and shallower reef options before assuming the deepest famous site is the best fit for your trip.

What the dive is really like

The signature route is a controlled descent along the sinkhole wall toward the stalactite ledge, followed by a conservative ascent and surface interval before shallower reef dives. It is more about geology and scale than coral color.

Treat the Blue Hole as a deep specialty-style profile, not a beginner reef tour.
Ask the operator what maximum depth is planned for your certification and comfort.
Use nearby Lighthouse Reef sites for the reef-life part of the day.

Questions to ask before booking

The right operator conversation matters more than a generic best-season claim. Clarify the route, backup options, dive order, and what happens if offshore conditions are marginal.

What is the planned maximum depth and bottom time?
Which sites are normally paired with the Blue Hole?
What weather or sea-state threshold cancels or changes the route?

Common questions about Great Blue Hole

Is the Great Blue Hole suitable for beginner divers?

It is commonly treated as an advanced or deep-profile dive because of depth, short no-decompression time, and offshore logistics. Newer divers should ask operators about certification requirements and consider shallower Belize reef sites instead.

How deep is the Great Blue Hole dive?

The sinkhole is much deeper than a normal recreational profile, while many guided scuba routes focus on a ledge around the deep recreational range. Confirm the exact planned maximum depth with your operator before booking.

Is the Great Blue Hole the best dive in Belize?

It is the most famous Belize dive, but not always the most colorful. Many divers value the Blue Hole for geology and the surrounding Lighthouse Reef wall dives for marine life and reef scenery.

Can PickADive tell me if conditions are safe today?

No. PickADive provides planning context only. Confirm weather, sea state, visibility, operator guidance, equipment, training limits, and local rules before diving.

Data updated June 2026

Site details

The Great Blue Hole is a near-perfectly circular marine sinkhole 318m across and 124m deep at the centre of Lighthouse Reef, famed worldwide since Jacques Cousteau surveyed it in 1971. Divers descend a sheer wall to a ledge at around 40m where huge ancient stalactites hang from an undercut overhang. It is a short, deep, atmospheric bounce dive rather than a marine-life dive, requiring conservative deep-diving discipline; most operators dive it first then visit shallower wall sites afterward.

boatcavereefwall

Depth and narcosis, short no-decompression time, offshore boat logistics, blue-water ascent discipline, dark or deep water, gas planning, and remote-site weather exposure.

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