Belize - Belize District

Blue Hothe

«The marine blue crater that has hypnotized for 12,000 years» - one of Cousteau's ten most beautiful diving spots in the world, in the heart of Lighthouse Reef atoll.

124 m deep
318 m diameter
1996 UNESCO classified
Diving
About the Blue Hole

The most emblematic karst crater in the Caribbean

Imagine a perfectly circular disc of navy blue, encircled by a turquoise ring of coral reef, sitting in the middle of a lost atoll 80 km off the coast of Belize. This is the Great Blue Hole - an underwater cenote 124 meters deep and 318 meters in diameter, the remains of a limestone cave that collapsed at the end of the last ice age, some 12,000 years ago, when rising waters engulfed the entire karst system.

The commander Jacques-Yves Cousteau led a mapping expedition there in 1971 aboard the Calypso and included it in his famous world's top 10 most beautiful dives. Since then, the site has been classified UNESCO in 1996 within the Belize Barrier Reef Reserve System, the second largest barrier reef in the world after the Australian Great Barrier Reef.

The Blue Hole is part of the Lighthouse Reef, one of only three coral atolls in the Caribbean - the other two being Turneffe Atoll and Glover's Reef, also a UNESCO site. A geological combo unique in the Western Hemisphere.

Our field tip: the Blue Hole is not a beginner's dive. Advanced level required (depth 40 m). But the experience is much more about the emotion than the fauna - descending into a 12,000-year-old cathedral of stalactites is like diving into a dry Pleistocene cave.

Diver descending the Blue Hole wall with visible stalactites
Lighthouse Reef Atoll - 80 km from Belize City
Reference

Geography & climate

An atoll lost off the coast of Belize - access exclusively by boat, weather that dictates everything, narrow optimal window. All you need to know before booking your live-aboard or day trip.

🗺️

Location & Access

  • 📍LocationLighthouse Reef Atoll, Belize district, 80 km east of Belize City, Caribbean Sea
  • ✈️AirportPhilip S.W. Goldson International (BZE) to Belize City - Paris flights via Miami, Atlanta, Houston or Cancún
  • 🚤Blue Hole access2h-2h30 by speedboat from San Pedro (Ambergris Caye) - OR live-aboard 4 to 7 days from Belize City Marina
  • 🏝️Atoll islandsLong Caye - Northern Caye - Half Moon Caye - Sandbore Caye - 4 islets only
  • ⚠️Diving levelAdvanced Open Water required (40 m+) - logbook check by tour ops
☀️

Climate & Season

  • 🌡️Water temperature26-28°C all year round - 3 mm shorty wetsuit sufficient
  • ☀️Dry seasonDecember → May - flat sea, clear sky, high diving season
  • 🌬️Sweet spot absoluApril → June - falling winds, visibility 25-30 m, mirror surface
  • 🌧️Green seasonJune → November - hurricane risk September-October, outings cancelled
  • 💨Absolute criterionCaribbean winds > 20-25 knots = cancellation. Always allow 2 buffer days

Month by month - when to dive?

The Blue Hole is weather-dependent: the ideal window is narrow but crucial.

Jan
☀️
Feb
💨
Mar
☀️
Apr
🐋
May
🐋
Jun
🤿
Jul
🌤️
Aug
🌧️
Sep
🌀
Oct
🌀
Nov
🌤️
Dec
☀️
Sweet spot Toucan (April-June) High diving season Hurricane risk / cancellation
Not to be missed

The 5 dives signature

The Blue Hole is the star of the trip, but without its neighbors, the experience remains incomplete. Here's the ideal combo of the three atolls and their major spots, in the order we program it on Dynamics.

1 Diving inside the Blue Hole, divers follow the karst wall with stalactites.
🤿 Mythical diving

Great Blue Hole - descent to 40 m

An underwater archaeology dive rather than a wildlife safari. Descent along the vertical wall to 40 m where stalactites and stalagmites appear - proof that 12,000 years ago, this cave was in the open air. Fauna: Caribbean reef sharks (Carcharhinus perezi), midnight parrotfish, occasional bull sharks. No sea horses despite persistent rumors.

🤫 Secret Pro : Less visibility in the hole (18-25 m) than around it (25-30 m). It's the dark cave atmosphere that strikes you, not the transparency.
👑 Level required: Advanced Open Water minimum, ideally Deep Diver. Depth 40 m, decompression stop mandatory on ascent.
2 Half Moon Caye Wall with multicolored tropical fish
🐠 Vertical wall

Half Moon Caye Wall - one of the most beautiful in the Caribbean

A 10-minute boat ride from the Blue Hole, the wall of Half Moon Caye drops steeply from a depth of 8 m to over 1000 m. Giant sponges, purple gorgonians, eagle rays, green turtles, nurse sharks resting under ledges. Visibility 25-30 m guaranteed, explosive colors. It's the diving that justifies the trip as much as the Blue Hole itself.

🤫 Secret Pro : do this dive second of the day (after the Blue Hole) - ideal nitrogen stop, midday light on the wall.
💡 Tip: keep an eye on the blue of the open sea: eagle rays, occasional hammerheads, hammerhead sharks in April-May.
3 Colony of red-legged boobies nesting in the vegetation of Half Moon Caye, Belize
🐦 Bird sanctuary

Half Moon Caye Natural Monument

The islet Half Moon Caye was classified Belize's first marine reserve in 1982. In between dives, 4,000 red-legged boobies (Sula sula) nesting in ziricotes, the only breeding colony in the Western Hemisphere. Free-roaming green iguanas, hermit crabs, pristine white sand beach. Birdwatching from a stilt tower in the heart of the trees.

🤫 Secret Pro : April-June = breeding season, juveniles visible. Bring lightweight binoculars + telephoto lens.
👑 Bonus wildlife : green turtles lay their eggs on the beach between May and October - the Belize Audubon Society organizes night watches in season.
4 Long Caye Aquarium shallow coral reef with schools of multicolored fish
🐟 Bright reef

Long Caye Aquarium - relaxing diving

To complete a day of 3 dives, we always choose Long Caye Aquarium bright reef, 6 to 18 m deep, schools of gorettes (Haemulon flavolineatum), parrotfish, spotted eels and the occasional seahorse. The name is not misleading: the water is so transparent and the density of fish so high that you have the impression of swimming in a giant aquarium. Pleasure diving, shallow, flippers on the surface possible.

🤫 Secret Pro : ideal for snorkeling - the reef starts 1.50 m below the surface.
💡 Tip: take away waterproof camera: exceptional color and fish density for underwater photos.
5 Live-aboard dive boat anchored off a coral atoll in Belize
⛵ Live-aboard adventure

Diving cruise 4 to 7 days - the 3 atolls

To get the full experience, the best formula is the live-aboard - a dive-dedicated hotel-boat that sails the three atolls for 4 to 7 nights: Lighthouse Reef (Blue Hole + Half Moon), Turneffe Atoll (Elbow, mythical drift dive) and Glover's Reef (Long Caye Wall). 3 to 4 dives a day, including one at night, no lost boat transfers, we sleep between two sites. The cream: Belize Aggressor IV and Sun Dancer II.

👑 Comfort: 8 to 18 air-conditioned double cabins, galley on board, instructor, nitrox included depending on formula. Ideal for diving couples or groups of 6-10.
💡 Tip: departure Saturday from Belize City marina, return the following Saturday. Price ~2,600 to 3,800 USD/person depending on season and formula.
Marine geography

Lighthouse Reef & the three atolls

Belize is the only Caribbean country to boast three true coral atolls - marine formations comparable to those in the Pacific. Understanding their geography helps you choose your dives and itinerary.

Lighthouse Reef (where the Blue Hole is)

For: mythical diving - ornithology - live-aboard

  • 🕳️ Great Blue Hole crater 124 m / 318 m, stalactites visible at 40 m, UNESCO 1996
  • 🐦 Half Moon Caye 1ʳᵉ country marine reserve (1982), red-legged booby colony, green turtles
  • 🌊 Half Moon Caye Wall wall dropping to 1000 m+, one of the most beautiful in the Caribbean
  • 🐠 Long Caye Aquarium dazzling shallow reef, ideal for snorkeling and photography
  • 🏝️ Inhabited islands Half Moon Caye - Long Caye - Northern Caye - Sandbore Caye

Turneffe & Glover's (UNESCO neighbors)

For: drift diving - wall diving - pelagic fauna

  • 🌀 Turneffe Elbow mythical drift diving, eagle rays, lemon sharks
  • 🐬 Turneffe Atoll Belize's largest atoll, mangroves, resident dolphins
  • 🪸 Glover's Reef UNESCO, easternmost atoll, clear waters, pristine reef
  • 🛶 Long Caye Wall (Glover's) abyssal wall, little-frequented waters
  • 🚤 Access only live-aboard or day-trip from San Pedro / Belize City
Bestiary

The wildlife that wait

The Blue Hole itself is an atmospheric dive, with no dense fauna. But the surrounding walls and reefs are teeming with iconic Caribbean marine life - and Half Moon Caye offers a unique bird show.

🦈
Caribbean reef shark
Carcharhinus perezi
All year round - Blue Hole & walls
🐦
Red-legged booby
Sula sula
April → June - Half Moon Caye
🐢
Green turtle
Chelonia mydas
May → October - beach egg-laying
🦎
Green Iguana
Iguana iguana
All year round - Half Moon Caye
🐟
Midnight parrotfish
Scarus coelestinus
Year-round - reefs
🦅
Eagle ray
Aetobatus narinari
All year round - walls
🦞
Caribbean lobster
Panulirus argus
All year round - ledges
🐠
Yellow gorette
Haemulon flavolineatum
All year round - Long Caye
Gastronomy

Flavors marine Belize

Aboard a live-aboard or on Half Moon Caye, the table features local seafood - lobster, conch, grilled fish - prepared in Belizean Creole, a fusion of Caribbean, Mayan and Garifuna influences.

🦞 Grilled lobster
~25 USD - flat
The atoll specialty. Caribbean lobster caught in the morning, grilled over coals, garlic butter and lime. Peak season: July to February (closed 15 Feb-15 Jul).
🐚 Ceviche de conch
~10 USD - entry
Sliced raw queen conch, marinated in lime, onion, cilantro and habanero pepper. A Belizean institution served with fried tortillas.
🐟 Grilled snapper
~18 USD - flat
Wood-grilled whole red snapper, tomato-thyme-pepper Creole sauce, rice with coconut milk and beans, fried plantains. Incomparable smoky flavor.
🍚 Rice & Beans
~7 USD - accompaniment
Rice cooked in coconut milk with kidney beans, onion, thyme and chili pepper. The signature accompaniment to any Belizean meal. Different from Costa Rican gallo pinto: creamier.
🍹 Rum punch
~6 USD - cocktail
Signature cocktail: One Barrel or Travellers (Belize) white rum, pineapple, orange, grenadine, grated nutmeg. In the evening, on the deck of a live-aboard, after 3 dives.
☕ Mayan coffee
~4 USD - cup
Coffee grown in the hills of Toledo (southern Belize) by Mayan Mopan cooperatives. Earthy, chocolaty notes. Breakfast on board with pineapple and fresh papaya.
Our field selection

Where sleep to dive the Blue Hole?

Most visitors choose a live-aboard or day-trip from Ambergris Caye. Here are our 3 options validated by our field team - depending on whether you prefer land- or sea-based.

4★
ITCA Lighthouse Reef Resort
Eco-luxury lodge on Long Caye, Lighthouse Reef atoll - diving at the door - close to Half Moon - seawater pool - 12 cabanas
Diving couples - Honeymoon adventure - Photographers
Book Dynamics
5★
Belize Aggressor IV (live-aboard)
Live-aboard premium 8 double cabins - 4-7 nights - 4 dives/day including night dives - nitrox included - chef on board - departure Belize City marina
Advanced divers - Couples - Groups 8-16 pax
Book Dynamics
5★
Sun Dancer II / Belize Aggressor III
Alternative live-aboards - 9 to 10 cabins - 7 standard nights - 3 covered atolls - premium service - ideal for couples underwater photographers
Premium travelers - Diver-photographers - Couples
Book Dynamics

Note Toucan terrain : the vast majority of Blue Hole travellers use either a live-aboard from Belize City (total immersion 4-7 days), i.e. a 13h day-trip from Ambergris Caye / San Pedro (departure 5:30 am, return 7 pm, 3 dives). Accommodation on the atoll itself is rare and confidential. We tailor your package to your level, budget and weather conditions. Plan my diving trip on Dynamics.

Expertise in the field

Tips Experts Toucan

The real advice that brochures don't give. 8 shortcuts to successful Blue Hole diving without disappointment or unpleasant surprises.

🤿
Level

Advanced Open Water compulsory

The Blue Hole = 40 m depth. Advanced level (PADI or CMAS 2★ equivalent) verified on boarding. Logbook required. Open Water only = serious tour ops refused.

📅
Season

Sweet spot: April to June

Late dry season, winds dropped, flat sea. Maximum visibility 25-30 m. Before April: 25-knot trade winds = frequent cancellations. After June: risk of hurricanes September-October.

💨
Weather

Always allow 2 buffer days

Caribbean winds > 20-25 knots = tour cancelled by serious tour ops. Allow 2 floating days in the itinerary to reschedule. Cancellation = standard refund, but day lost.

🚤
Day trip

Day-trip = 13h boat trip

Depart San Pedro 5.30am, return 7pm. 2h-2h30 speedboat outward, ditto return. Fast boat, jolts, seasickness possible. Scopoderm patch the day before recommended. Light breakfast.

⛵
Live-aboard

Comfort makes all the difference

The premium option = live-aboard 4-7 nights. 3-4 dives/day, sleeping on site, no transfers. Belize Aggressor IV or Sun Dancer II = worldwide references. Count ~2600-3800 USD/pers.

🦈
Fauna

No prehistoric sea horses

There's a persistent rumour about giant seahorses in the Blue Hole. False. The real fauna: Caribbean reef sharks, sometimes bull sharks, midnight parrotfish, and the real show = stalactites + cave atmosphere.

🛂
Formalities

No EU visa < 30 days

Passport valid 6 months after return. Belize Travel Authorization no longer in effect since 2024. Airport exit tax 20 USD (to be paid in cash). Up-to-date PADI logbook or PADI app.

🌐
Tour ops

Choose a serious agency

On day trip San Pedro: Amigos del Mar, Belize Diving Adventures, Scuba School Caye Caulker. Avoid the low-cost agencies on Coconut Drive: aging equipment, under-trained instructors.

Avoid the classic pitfalls

  • ❌ Book without weather buffer: 1 day = Russian roulette. Allow at least 2-3 days on the itinerary to plan the dive.
  • ❌ Coming as a novice: Open Water is not enough. Do your Advanced upstream at Ambergris or Caye Caulker.
  • ❌ Choose low-cost agency: poorly maintained equipment, insufficient deep dive safety. Save 50 USD, risk of serious accident.
  • ❌ Hurricane season : September-October = air gaps, cascade of cancellations. Prefer April-June or December window.
  • ❌ Tired diving : 13h boat trip + 3 dives = exhausting. Arrive rested, hydrated and on a light stomach.
  • ❌ Forget your PADI license: tour ops refuse boarding without proof. Photo in phone insufficient: plastic card or official PADI app.
📄

Take the Blue Hole plug everywhere

PDF version complete with atoll map, climate, signature dives, live-aboard accommodations and expert tips. Ideal for preparing your trip offline or slipping into your dive bag.

Download PDF file
Frequently asked questions

Your questions, our answers

The 6 most frequently asked questions about Blue Hole and Lighthouse Reef.

Can you dive the Blue Hole with an Open Water?
No, serious tour operators require a Advanced Open Water (PADI) or equivalent (CMAS 2★, SSI Advanced). The dive descends to 40 m, a depth reserved by certification for the Advanced level. Check logbook on boarding. If you arrive with an Open Water certification, allow 2 days on Ambergris Caye to validate your Advanced (~350 USD, 4 dives) before the Blue Hole outing.
How many days should I reserve in Belize for the Blue Hole?
Minimum 5 days on site. Typical pattern: 2 nights in San Pedro (Ambergris Caye) for acclimatization and warm-up dives + 1 day Blue Hole day-trip + 1-2 days weather buffer + rest / recovery. Ideal: 7-10 days to combine Caye Caulker, Ambergris, Blue Hole and a little of the continent (Caracol, Hopkins). Live-aboard: 5-8 days.
Are there really sharks in the Blue Hole?
Yes, we regularly come across Caribbean reef sharks (Carcharhinus perezi), often in groups of 4-8 on patrol along the walls. Occasional bull sharks or hammerheads in high season. These species are non-aggressive towards respectful divers, but instructor supervision is essential. This is one of the great thrills of the site.
How do I get to the Blue Hole from France?
Flights Paris → Belize City (BZE) via Miami, Atlanta, Houston, Newark or Cancún. No direct flights from France to Belize. Allow 12-16 hours total travel time. On arrival: transfer to San Pedro by Tropic Air domestic flight (15 min, 100 USD) or by speedboat (1h30, 35 USD). For live-aboard: departure from Belize City marina on Saturday. Our Toucan team builds the complete itinerary on Dynamics.
What's the budget for diving the Blue Hole?
Day-trip 3 dives from San Pedro 280-340 USD/person (transport, 3 dives Blue Hole + Half Moon Wall + Long Caye Aquarium, lunch, 40 USD marine park taxes included). Live-aboard 7 nights USD 2,600-3,800/person depending on season and package (cabin, meals, 18-22 dives, nitrox). Ambergris Caye 4★ hotel: 180-280 USD/night. Total budget for 8-day diving trip: 2,500-5,000 USD/person excluding international flights.
Is the Blue Hole really worth the detour?
Honest answer from divers: yes for the symbol, the emotion and the photo. One of the most iconic descents in the world, the feeling of plunging into a 12,000-year-old sunken cave is unique. But not if you're looking for dense wildlife Blue Hole: visibility in the hole is reduced, and the fauna limited to a few reef sharks. The ideal combo = Blue Hole + Half Moon Wall + Long Caye Aquarium on the same day, turning a signature dive into a memorable day.
Build your itinerary

Combining the Blue Hole with...

The Blue Hole is the signature experience, but Belize is full of complementary nuggets. Here are 5 destinations to combine for a complete 10-15 day trip.

Ambergris Caye white sand beach in Belize with turquoise waters
Ambergris Caye
2H - SPEEDBOAT
Ideal base for Blue Hole day-trip, San Pedro ambience, Hol Chan diving
Discover →
Caye Caulker in Belize with colorful houses along a wooden dock
Caye Caulker
1H - BOAT
Bohemian backpacker island, Go Slow atmosphere, snorkeling The Split
Discover →
Maya pyramid at Caracol, Belize, emerging from the tropical jungle
Caracol - Cayo
5H - 290 KM
Monumental Mayan city, highest Caana pyramid 43 m, virgin jungle
Discover →
Placencia beach in southern Belize with hammock and palm trees
Placencia
4H - 250 KM
South Peninsula, white sand beaches, Glover's Reef accessible, shark whale
Discover →
Garifuna village of Hopkins in Belize with colorful wooden houses
Hopkins
3H30 - 220 KM
Authentic Garifuna village, Afro-Caribbean culture, drumming, traditional cuisine
Discover →
Ready for the big blue?

We organize your dive at Blue Hole

Build your diving holiday in just a few clicks with Toucan Dynamics - Aggressor / Sun Dancer live-aboards in real time, day-trips from San Pedro, PADI Advanced certifications on site, transfers included, secure payment. Or let us take care of everything for you: an English-speaking consultant based in Central America will accompany you from briefing to last fin.

Compose my trip Request a customized quote

You are travel agent, diving club or tour operator ? Toucan Discovery is also your local receptive in Central America and the Caribbean - B2B access to Dynamics, net rates, on-site French-speaking support, diving expertise Belize / Honduras / Mexico / Costa Rica.