How deep are the dives?

Intro dives are 5–10 meters; certified dives may reach 18–30 meters depending on experience.

What marine life can I expect to see?

Expect to see <link linkType="internal" newTab="true" url="" id="ZZ9X0tNQ" shortCodeType="link" relationTo="pages" documentId="68930faef24a5bbd728912b9" text="marine life" uid="www.cairnstickets.com.great-barrier-reef.marine-life" lang="en" /> such as clownfish, parrotfish, sea turtles, rays, reef sharks, and vibrant corals.

Yes, most tours offer full buffet lunch plus snacks and drinks onboard.

What if I’ve never dived before?

An intro dive is designed for beginners; you'll be briefed and dive with an instructor beside you. No certification needed.

Can I learn to dive in Cairns?

Yes, PADI Open Water courses run about four days and finish on the outer reef.

What are the dive durations?

Each dive typically lasts 30–50 minutes, depending on the site and your air supply. Most tours include 1–2 dives per day.

What equipment is provided?

All essential scuba gear is provided: mask, fins, snorkel, wetsuit, tank, and weights. Certified divers should bring their PADI or equivalent certification card.

Can I do multiple dives in one day?

Yes! Tours often include two dives with a surface interval in between, allowing rest and hydration.

What happens in bad weather?

Tours monitor conditions closely. If weather prevents diving, operators may reschedule, offer <link linkType="internal" newTab="true" url="" id="ILZjjEcU" shortCodeType="link" relationTo="pages" documentId="67ed36b070b6441ab59143b2" text="snorkeling" uid="www.cairnstickets.com.great-barrier-reef.snorkeling-tours" lang="en" />, or provide refunds/credits depending on policy.

Is there a weight or age limit?

Intro dives typically have a minimum age of 12. Weight limits may apply for safety; check with the operator before booking.

How crowded are the dive sites?

Outer reef sites are usually less crowded than inner reef areas, but numbers depend on the tour operator and group size.

How should I prepare physically?

Being in reasonable health is important. Avoid heavy meals or alcohol before diving and stay well-hydrated.

Absolutely, dive boats run snorkelling too. → <link linkType="internal" newTab="true" url="/great-barrier-reef/snorkeling-tours/" id="phhRr81d" shortCodeType="link" relationTo="pages" documentId="67ed36b070b6441ab59143b2" text="Snorkelling tours" uid="www.cairnstickets.com.great-barrier-reef.snorkeling-tours" lang="en" />

Below the Surface: Great Barrier Reef Scuba Diving

Crafted by Headout, a global experiences brand offering curated tours, tickets & experiences. Discover with ease, book with peace.

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4,723 travellers from around the world love this

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Sightseeing Cruises

Cairns to Outer Reef Snorkel Cruise with 2 Reef Visits & BBQ Lunch

Tip: Try to take some time out to visit the rusty market between Sheridan and Grafton Street, which comes to life from Friday to Sunday and offers visitors a wide variety of exotic fruits and vegetables.
This activity is dependent on the weather.
All divers are required to complete an onboard medical questionnaire.
Divers over 65 must have medical clearance from a physician confirming they are fit to dive. Please be aware that certain medical conditions (e.g. asthma, heart disease, diabetes) and any prescription medications will require a letter or email from a doctor clearing you to dive. This clearance must state your full name, the doctor's name, and practice, and the clearance to dive for the specific medications/condition.
The experience is restricted for guests aged 12 and under.
Diving within 24 hours before your flight is not permitted.
For the certified dives, you will need to produce your certification card. For intro dives, no experience is necessary.

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Check availability

Flexible cancellation

Book now, pay later

8 hrs - 8 hrs 30 mins

Guided tour

Transfers available

Meals included

🧭 Trying diving, or already certified? First time?

An introductory dive needs no experience and no certification: just a briefing and an instructor at your side. Certified, or want to be? Day dives, PADI courses, and liveaboards go further out, deeper, and across more sites. See all your options.

Diver exploring underwater with a lionfish during Scuba Diving tour.

Compare all diving tours

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Scuba Diving

From Cairns: Snorkel Cruise to 2 Outer Reefs with Lunch & Optional Dive

This activity is not wheelchair, pram/stroller accessible.
This activity is not recommended for those with impaired physical mobility.
This activity is able to accommodate special dietary requirements (allergies, gluten intolerance, vegetarian diets, or other dietary needs).
You are advised to bring along a change of clothes, sunscreen, caps or hats, swimwear, cash, towel, and sunglasses.

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Check availability

Flexible cancellation

Book now, pay later

8 hrs 15 mins - 8 hrs 30 mins

Guided tour

Pickup available

Meals included

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Guided Tours

Cairns to Great Barrier Reef Cruise Guided Snorkelling Tour at 3 Outer Reefs

8am: Check in at Cairns Marlin Marina and board the boat
8.30am: Depart Cairns and receive safety briefings as we travel to the outer reef
10am: Arrive at first snorkel and dive site
12.45pm: Move to second site and enjoy lunch
1.30pm: Continue diving and snorkelling
3pm: Depart reef site
4.30pm: Arrive back in Cairns

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Check availability

Flexible cancellation

Book now, pay later

8 hrs 30 mins

Meals included

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Sightseeing Cruises

From Cairns: 2 Islands in 1 Day Trip of Fitzroy & Green Islands

Explore two Great Barrier Reef islands in one day; snorkel, hike, and discover vibrant marine life.

Everything you get: Fitzroy and Green Island visits in one day, over 6 hours to explore the reef, rainforest trails and beaches, expert commentary and marine biology presentation, all-day snorkel equipment use at both islands.
Why choose this: Perfect for travelers short on time, see two iconic islands, snorkel in crystal-clear waters, and learn from marine experts, all in one seamless adventure.
Upgrades: Enhance your day with a Fitzroy glass-bottom boat tour, snorkelling gear, or a picnic lunch.

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Check availability

Flexible cancellation

Book now, pay later

8 hrs 30 mins

Meals included

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Sightseeing Cruises

Cairns to Green Island and Outer Reef Sailing Cruise with Guided Snorkel and Lunch

Tip: Keep an eye out for blue-spotted stingrays and turtles in the shallow waters of Green Island when you take a stroll around the remote beaches.
This experience is not accessible by wheelchair and pram/strollers.
Guests with asthma, diabetes, heart conditions, and epilepsy are restricted from participating in the scuba diving experience.
Children must be supervised by their parents at all times.
Guests can convey their dietary preferences or allergy concerns to the operator 24 hours prior to the trip.
Guests must be at least 12 years old to do an introductory dive.

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Check availability

Flexible cancellation

Book now, pay later

9 hrs

Meals included

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Sightseeing Cruises

Cairns to Great Barrier Reef Full Day Cruise with Scenic Heli-Flight and Lunch

7:15am to 7.45am: Check-in at the Reef Fleet Terminal - 1
8.00am: Evolution departs Cairns for the first reef location
11:30am: Enjoy a BBQ buffet lunch onboard
1:00pm: Evolution arrives at the second reef location where you will take to the sky for your scenic helicopter flight
3:00pm: Evolution departs for Cairns
4:30pm: Evolution arrives back in Cairns

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Check availability

Flexible cancellation

Book now, pay later

8 hrs 30 mins

Guided tour

Transfers available

Meals included

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Great Barrier Reef scuba diving: Explore coral reefs & swim with turtles

Drop below the surface and the reef unfolds in three dimensions: coral walls dropping into blue, swim-throughs cut with light, a reef shark gliding by like it owns the place (it does). And here's the part most people don't realize about scuba diving in the Great Barrier Reef: you don't need to be certified to do this. An introductory dive puts a total beginner underwater with an instructor right beside them. First-timers and log-book veterans both leave grinning. Scroll down to discover the best dive spots, what marine life you’ll encounter, and tips to make your adventure truly unforgettable.

5 reasons to make Great Barrier Reef your next scuba diving destination

1/5

Iconic dive sites

Explore world-famous locations like Agincourt Reef, Flynn Reef, and Norman Reef, each offering unique underwater landscapes, vibrant coral gardens, and dramatic drop-offs.

Convenient access

Depart directly from Cairns for full-day or multi-day tours with hotel transfers included, making it easy and hassle-free.

Expert-guided tours

Certified instructors and guides ensure safety, share local knowledge, and help you get the most out of your underwater adventure.

Incredible marine life

Home to 1,500+ fish species, 400 types of coral, and rare creatures like the pygmy goby, showcasing the reef’s incredible diversity.

Year-round accessibility

With favorable weather conditions and water temperatures ranging from 24°C to 30°C, the Great Barrier Reef is a year-round diving destination.

Compare every Great Barrier Reef scuba diving option

Tour	Price from	Best for	Inclusions	Dive options
Dreamtime: 2 Outer Reefs + Optional Dive	AU$255	Divers wanting choice + cultural insight	Gear, buffet lunch, Indigenous ranger talks, teas	Intro & certified · 2 outer reefs
Down Under: Outer Reef, 2 Reefs + BBQ	AU$275	A flexible snorkel-or-dive day	Transfers, gear, BBQ buffet, 2 outer reef sites	Snorkel or dive · 2 outer reefs
Divers Den: 3 Outer Reefs — Norman, Saxon, Hastings	AU$275	Chasing the most reef variety	Lunch, expert guides at 3 sites	Guided snorkel · dive available · 3 reefs
Ocean Free: Green Island + Outer Reef Sailing Cruise	AU$289	Small-group intro divers & couples	6-hr sail, buffet, drift snorkel, 2:1 intro dives	Intro dive (2:1) · outer reef
Superyacht Full Day + Scenic Heli-Flight	AU$440	A luxury dive splurge	Superyacht, gourmet BBQ + wine, 10-min heli, guided dive	Intro & certified · 2 reefs

Everything to know about your Great Barrier Reef diving experience

What's included

All dive gear and a professional guide/instructor
Full safety briefing and (for intro divers) in-water instruction
Snorkelling gear too, so non-diving friends share the day
Buffet or BBQ lunch and refreshments
Marine-park fees and reef taxes

The process

The briefing: Your instructor walks you through the gear, the hand signals and how to clear your ears.
Shallow first: You start in a calm, shallow spot to get used to breathing underwater.
Onto the reef: Once you're comfortable, your instructor leads you out over the coral, holding on if you want them to. Depth is gentle for intro dives.
The encounters: Clownfish in their anemones, giant clams, maybe a turtle or a reef shark cruising past.
Back on board: Peel off the gear, grab lunch, and start planning your next one .

Good to know before you dive

No experience? No problem. Intro dives are built for complete beginners, this is the most common "first dive ever" on the reef.
Health check. You'll complete a short medical questionnaire; some conditions need a doctor's sign-off, so read it in advance.
Certified? Bring your card and logbook, and note when you last dived.
Flying home? Leave 18–24 hours between your last dive and your flight.

Top diving sites at Great Barrier Reef

Marine life you’ll see during your dive

Sea turtles

Green turtles and hawksbill turtles glide gracefully among coral reefs, often seen feeding on seagrass or resting on the reef, adding a serene charm to every dive.

Shark swimming at Clearwater Aquarium exhibit.

Manta rays swimming underwater in a sunlit ocean.

Humphead Wrasse swimming with fish, Great Barrier Reef, Whitsundays.

Nudibranch on coral in Great Barrier Reef, Australia.

Plan your diving tour

Guests relaxing on cruise ship deck overlooking the Great Barrier Reef, Australia.

Duration: Approximately 8 hours, including hotel transfers.
Departure: Hotel pickups start around 7:15–8:30am from Cairns.
Return: Guests are typically back at their hotels by 3:30–4.30pm.

Beach essentials for snorkeling including a hat, towel, sunglasses, flip-flops, and sunscreen.

Swimwear and towel: Comfortable swimwear for diving or snorkeling and a towel for drying off.
Sunscreen and sunglasses: Reef-safe sunscreen to protect your skin and sunglasses for post-dive relaxation.
Underwater camera or GoPro: Capture vibrant corals, marine life, and unforgettable moments underwater.
Certification card (for certified divers): PADI or equivalent card required for certified dives; beginners can join guided intro dives.
Motion sickness remedies: If you’re prone to seasickness, take tablets before boarding.

Instructor guiding tourists on diving equipment during Outer Great Barrier Reef cruise, Australia.

Health & fitness: Guests should be in good health; pregnant women or those with heart/respiratory issues should consult a doctor.
Diving certification: Certified divers must bring their card; beginners can participate in supervised intro dives.
Punctuality & safety: Arrive on time for hotel pickup and attend the mandatory safety briefing before diving.
Designated zones: Stay within the areas marked for snorkeling and diving to protect marine life.
No feeding or touching: Do not feed, touch, or disturb fish, corals, or other marine life.
No smoking or alcohol: Prohibited during the tour and onboard the yacht.

Key tips for diving at Great Barrier Reef

Choose the right dive option: Beginners should opt for introductory dives with certified instructors. Certified divers can access deeper sites like Agincourt or Norman Reef. Know your skill level to maximize safety and enjoyment.
Maintain neutral buoyancy: Controlling your buoyancy prevents accidental contact with delicate corals, keeps you safe, and allows better viewing of marine life.
Monitor air supply & depth: Regularly check your tank pressure and depth gauge. Ascend slowly, follow your guide, and never push beyond your comfort or certification limits.
Plan your surface intervals: Use breaks wisely between dives to rest, hydrate, and prepare for the next dive. Avoid strenuous activity immediately after diving.
Observe dive fags & markers: These indicate safe swimming zones and guide boats. Always respect them to avoid accidents and protect marine life.

Frequently asked questions about Great Barrier Reef scuba diving tours

No. Many tours offer supervised intro dives with no certification required.

Below the Surface: Great Barrier Reef Scuba Diving

Cairns to Outer Reef Snorkel Cruise with 2 Reef Visits & BBQ Lunch

From Cairns: Snorkel Cruise to 2 Outer Reefs with Lunch & Optional Dive

Cairns to Great Barrier Reef Cruise Guided Snorkelling Tour at 3 Outer Reefs

From Cairns: 2 Islands in 1 Day Trip of Fitzroy & Green Islands

Cairns to Green Island and Outer Reef Sailing Cruise with Guided Snorkel and Lunch

Cairns to Great Barrier Reef Full Day Cruise with Scenic Heli-Flight and Lunch

Great Barrier Reef scuba diving: Explore coral reefs & swim with turtles

5 reasons to make Great Barrier Reef your next scuba diving destination

Iconic dive sites

Convenient access

Expert-guided tours

Incredible marine life

Year-round accessibility

Compare every Great Barrier Reef scuba diving option

Everything to know about your Great Barrier Reef diving experience

What's included

The process

Top diving sites at Great Barrier Reef

Marine life you’ll see during your dive

Sea turtles

Plan your diving tour

Key tips for diving at Great Barrier Reef

Frequently asked questions about Great Barrier Reef scuba diving tours

Do I need to be certified to dive the Great Barrier Reef?

How deep are the dives?

What marine life can I expect to see?

Is lunch included?

What if I’ve never dived before?

Can I learn to dive in Cairns?

What are the dive durations?

What equipment is provided?

Can I do multiple dives in one day?

What happens in bad weather?

Is there a weight or age limit?

How crowded are the dive sites?

How should I prepare physically?

Can non-divers come?

Continue planning your reef journey

Outer Great Barrier Reef tours

Green Island tours

Pontoon tours

Tours from Port Douglas

Agincourt Reef

Flynn Reef

Norman Reef

Saxon Reef

North Hastings Reef

What's included

The process

Outer Great Barrier Reef tours

Green Island tours

Pontoon tours

Tours from Port Douglas

Cairns to Outer Reef Snorkel Cruise with 2 Reef Visits & BBQ Lunch

From Cairns: Snorkel Cruise to 2 Outer Reefs with Lunch & Optional Dive

Timings

Important Information

Discounted Tickets

Cairns to Great Barrier Reef Cruise Guided Snorkelling Tour at 3 Outer Reefs

From Cairns: 2 Islands in 1 Day Trip of Fitzroy & Green Islands

What to bring

What’s not allowed

Accessibility

Additional information

Cairns to Green Island and Outer Reef Sailing Cruise with Guided Snorkel and Lunch

Cairns to Great Barrier Reef Full Day Cruise with Scenic Heli-Flight and Lunch

Timings

Important Information

Discounted Tickets

What to bring

What’s not allowed

Accessibility

Additional information

Below the Surface: Great Barrier Reef Scuba Diving