The Great Barrier Reef is the world's largest living organism — a UNESCO World Heritage marine ecosystem stretching 2,300 kilometres along Queensland's coastline, encompassing around 2,900 individual reefs and 900 islands. It is home to more than 1,500 fish species, 400 types of coral, 4,000 varieties of molluscs, and countless other marine animals including sea turtles, dolphins, reef sharks and seasonal humpback whales.

Cairns is Australia's premier gateway to the Great Barrier Reef — uniquely positioned to access some of the healthiest and most spectacular outer reef sections. Modern high-speed catamarans depart daily from Cairns Marina, reaching outer reef pontoons in as little as 90 minutes. Whether you want to snorkel vibrant coral gardens, learn to dive with PADI instructors, drift above the reef in a glass-bottom boat, or soar over coral cays by helicopter — the full spectrum of reef experiences launches from this city.

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2,300km
World's largest coral reef
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1,500+
Fish species
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UNESCO
World Heritage listed 1981
⛵
90 min
From Cairns to outer reef

Choose Your Experience

Great Barrier Reef Tour Options

From first-time snorkellers and young families to experienced divers seeking remote outer reef sites — there's a reef tour designed for your adventure level and interests.

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Most Popular

Full-Day Snorkelling Tour

From $129 per person

The classic Great Barrier Reef day trip from Cairns — the most popular reef experience and the best introduction to Australia's greatest natural wonder. Board a modern high-speed catamaran and cruise to two outer reef locations for a full day of snorkelling above pristine coral gardens. All equipment included, expert marine guides in the water with you, and a comprehensive marine biology presentation on the way out.

  • 2 outer reef sites
  • All snorkel gear
  • Wetsuit & flotation vest
  • Marine biology talk
  • Buffet lunch
  • Hotel transfers
  • Glass-bottom boat
🕗 8–9 hours · Departs ~8 am Book now →
Bucket List

Scuba Diving Experience

From $189 per person

Cairns is one of the best places in the world to learn to scuba dive — and the outer Great Barrier Reef is your classroom. Introductory dives are available to complete beginners (minimum age 12), with PADI-certified instructors guiding you through your first underwater experience in sheltered, crystal-clear conditions. Certified divers can explore deeper reef walls, coral bommies and pelagic zones with multiple dive sites included.

  • Intro dives for beginners
  • PADI certified instructors
  • Certified dive sites
  • Dive equipment included
  • Multiple reef sites
  • Dive photos available
🕗 Full day · Min age 12 Book now →
Family Favourite

Reef Pontoon Cruise

From $239 per person

Experience the Great Barrier Reef from the comfort of a purpose-built floating reef platform — perfect for families, non-swimmers and anyone who wants a leisurely, all-inclusive day on the water. Reef pontoons feature underwater observatories, glass-bottom boat tours, semi-submersible vessels, waterslides, children's enclosed snorkel areas, sundeck and covered dining. See the reef from every angle without ever leaving the platform.

  • Underwater observatory
  • Glass-bottom boat
  • Semi-submersible
  • Children's swim area
  • Waterslide (Moore Reef)
  • All meals included
  • Non-swimmer friendly
🕗 Full day · All ages welcome Book now →
Ultimate Experience

Helicopter & Reef Combo

From $399 per person

See the Great Barrier Reef from above and below the water on the same day — one of Australia's most breathtaking combined experiences. Fly over turquoise coral cays, Heart Reef and outer reef formations in a scenic helicopter, then descend below the surface to snorkel the coral gardens in person. A fly-cruise or cruise-fly option reduces travel time to the reef, giving you more time in the water. Once-in-a-lifetime.

  • Scenic helicopter flight
  • Heart Reef aerial view
  • Outer reef snorkelling
  • Fly-cruise or cruise-fly
  • Aerial photography
  • Green Island combo option
🚁 Full day · Premium experience Book now →

What You'll See

Great Barrier Reef Marine Life

The reef's extraordinary biodiversity means every tour delivers genuine wildlife encounters — no two dives are ever the same.

400+ coral species
Iconic · Every Tour

Coral Gardens

Vast formations of hard and soft coral — staghorn, brain coral, fan coral, massive porites — teeming with thousands of species of fish, molluscs and invertebrates in an underwater cityscape that beggars description.

Green & Hawksbill
Most Sighted

Sea Turtles

Green and hawksbill sea turtles are among the most reliable sightings on any reef tour. Watch them glide effortlessly through the water or rest on coral heads between feeding.

1,500+ fish species
Everywhere

Tropical Fish

Clownfish (Nemo), parrotfish, angelfish, butterflyfish, giant wrasse, Maori wrasse and vast schools of fusiliers create a living kaleidoscope around every coral head.

Whitetip & Blacktip reef
Thrilling

Reef Sharks

Whitetip and blacktip reef sharks are common visitors to outer reef sites — completely harmless to snorkellers and divers, and a genuinely thrilling encounter to experience.

Seasonal & remote sites
Spectacular

Manta Rays

Reef manta rays with wingspans up to 5 metres frequent outer reef cleaning stations — seeing one glide overhead in silence is a spine-tingling moment that many divers call a highlight of their lives.

Up to 100+ years old
Ancient

Giant Clams

Century-old giant clams, some over a metre wide, sit in shallow reef sections in extraordinary colours — electric blues, purples and greens — pulsing gently as you float above them.

Outer Reef Locations

Popular Reef Sites
from Cairns

🪸 Moore Reef Pontoon 🪸 Michaelmas Cay & Reef 🪸 Hastings Reef 🪸 Flynn Reef 🪸 Milln Reef 🪸 Thetford Reef 🪸 Upolu Reef 🪸 Ribbon Reefs 🪸 Cod Hole 🐟 Agincourt Reef

What's Included

Standard Tour Inclusions

Most full-day Great Barrier Reef tours from Cairns include the following as standard. Always confirm with your operator at the time of booking.

Free Hotel Transfers
Complimentary pick-up and drop-off from Cairns CBD and most Northern Beaches accommodation.
High-Speed Catamaran
Comfortable, air-conditioned fast catamaran transfer to outer reef sites — reaching the reef in 90 minutes or less.
Snorkelling Equipment
Full snorkel kit — mask, fins, wetsuit or stinger suit, buoyancy vest and flotation noodles for non-swimmers.
Expert Marine Guides
PADI instructors and marine biologists in the water with you — guided snorkel tours at every reef site.
All Meals
Hot and cold buffet lunch with tropical fruits, morning tea and afternoon tea. Dietary requirements catered for on request.
Marine Biology Presentation
Expert reef ecology and marine biology talk on the way to the reef — learn what you'll see before you see it.
Glass-Bottom Boat
Guided glass-bottom boat tours at reef sites — ideal for non-swimmers, children and those who prefer to stay dry.
Reef-Safe Sunscreen
Reef-safe mineral sunscreen available onboard. Use of reef-safe products is required within the Great Barrier Reef Marine Park.
Professional Photography
Onboard professional photographers capture your reef moments. Packages available for purchase on the day.

Plan Your Trip

Best Time to Visit the
Great Barrier Reef

Reef tours depart daily from Cairns year-round — each season delivers its own unique marine encounters and conditions.

Dry Season
May – October

Peak snorkelling & diving season — calm seas, 20–30 m visibility, comfortable 22–28°C. Best time to visit overall. Book well in advance for July–August school holidays.

Minke Whales
June – July

The exclusive window to swim with dwarf minke whales on select liveaboard trips at the Ribbon Reefs — one of the rarest and most magical marine encounters on Earth. Only available June–July.

Humpbacks
July – September

Humpback whale season — migrating pods pass through reef waters between July and September. Many tour vessels encounter whales on transit to and from reef sites.

Wet Season
November – April

Warmer water (26–30°C), coral spawning events (November–December), whale shark sightings and fewer crowds. Afternoon storms possible. Excellent value and availability during this period.

Before You Go

Practical Travel Information

Departure Times

Most full-day reef tours depart from Cairns Marina between 7:30 am and 8:30 am, returning by 5:30–6:00 pm. Half-day tours depart at noon (afternoon) or 8:00 am (morning), giving you flexibility to combine with another activity. Cruise ship visitors should note 3 daily departure windows on select tours.

What to Bring

Pack swimmers (worn under clothes), a towel, reef-safe sunscreen, hat, sunglasses, light jacket for the boat ride, and any personal medication. Leave valuables at your hotel — secure storage is limited. A small waterproof camera or GoPro is highly recommended. Most operators have underwater cameras for hire.

Marine Park Rules

The Great Barrier Reef Marine Park has strict environmental protection rules. Do not touch, stand on or collect any coral or marine life. Use only reef-safe mineral sunscreen. Do not feed fish. Stay within guide-marked snorkel zones. These rules exist to protect the reef for future generations — all operators take compliance seriously.

Families & Children

Most reef tours are family-friendly from age 4+, with snorkelling recommended from age 6. Reef pontoons with enclosed children's swimming areas are ideal for young families. Introductory scuba diving is available from age 12. Children's rates apply on most tours — ask about family pricing packages when booking.

Sea Conditions & Safety

Outer reef sites are generally calm with minimal current. Stinger suits (lycra) are provided year-round and are strongly recommended November–May when marine stingers are present in reef waters. All operators carry onboard medics, oxygen and first aid equipment. Tours may be modified or cancelled in severe weather with full refunds offered.

Booking & Cancellation

Book online 24/7 or call 07 4041 3244 (Mon–Fri, 9am–5pm AEST). Free cancellation is available up to 48 hours before departure on most tours. Peak season (June–September) books out weeks in advance — we recommend booking at least 5–7 days ahead. Early bird discounts of up to 15% available on selected dates.

Common Questions

Great Barrier Reef Tours
FAQ

Most full-day Great Barrier Reef tours from Cairns run 8–9 hours total, including the 90-minute catamaran journey each way. You'll spend approximately 4–5 hours at the outer reef sites for snorkelling, diving and other marine activities. Half-day tours (4–5 hours total) are available for visitors with limited time, including three daily departures designed specifically for cruise ship passengers.
Basic swimming ability is recommended for snorkelling, but all operators provide buoyancy vests and full-length wetsuits that help you float naturally in the water. Guided snorkel tours stay in calm, shallow areas. Non-swimmers can still fully experience the reef via glass-bottom boat tours, semi-submersible vessels and underwater observatories — you don't need to enter the water at all to witness stunning reef life.
The dry season (May–October) delivers the best overall conditions — calm seas, 20–30 metre water visibility, comfortable temperatures and reliable weather. June and July offer the unique chance to swim with dwarf minke whales on liveaboard trips (the only place in the world to do this). July–September is humpback whale season. The wet season (November–April) brings warmer water, dramatic coral spawning and fewer crowds, with excellent value on accommodation and tours.
Yes — all visitors to the Great Barrier Reef Marine Park are strongly encouraged to use reef-safe, mineral-based sunscreen free from oxybenzone and octinoxate, chemicals that cause coral bleaching. Many tour operators sell reef-safe sunscreen onboard and some require it as a condition of entry to the water. A full-length wetsuit or stinger suit provides excellent UV protection and reduces sunscreen use altogether.
Many reef pontoons and larger catamaran vessels are wheelchair accessible, with ramps, accessible bathrooms and viewing platforms. The Sunlover Moore Reef pontoon and Great Adventures reef platform both have good accessibility. Contact operators directly to discuss specific needs — most are experienced in accommodating guests with mobility challenges and can arrange adaptive snorkelling equipment.
Essential items: swimmers worn under your clothes, towel, reef-safe mineral sunscreen, hat, sunglasses, light jacket for the boat ride (can be cool at speed even in summer), any personal medication, and a waterproof camera or GoPro. Leave valuables, jewellery and large bags at your hotel. Most operators have lockers or secure storage, but space is limited. Underwater cameras and GoPros are available to hire onboard.

Also Popular from Cairns

Daintree Rainforest
Daintree & Cape Tribulation Day Tour
Full dayFrom Cairns
Tandem Skydiving
Cairns Tandem Skydive over the Reef
Half day15,000 ft
Fitzroy Island
Fitzroy Island Day Trip & Reef Snorkel
Full day45 min from Cairns
Green Island
Green Island Coral Cay Day Tour
Half or full day40 min from Cairns
Atherton Tablelands
Atherton Tablelands Waterfalls Day Tour
Full dayFrom Cairns

Ready to Explore the Great Barrier Reef?

Whether you want to snorkel vibrant coral gardens, scuba dive with sea turtles, cruise in comfort on a reef pontoon, or combine reef and helicopter in one unforgettable day — book with confidence through Cooee Tours. Daily departures, free hotel transfers, and expert local advice.

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07 4041 3244Mon–Fri · 9am–5pm AEST
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