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

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Guided Tours

From Cairns [Cruise Out, Scenic Flight Back]: Half Day Moore Reef Tour with Activities & Lunch

Make time count with reef time then helicopter views, seeing the coral from both water and sky.

Everything you get: Ferry to Moore Reef for 2.5 hours reef time, with snorkel gear, lycra suit and lifejacket provided. Glass bottom and semi-sub tours, waterslide, sundeck, kids pool and underwater observatory, plus 25 min helicopter to Cairns Airport, transfer and fuel surcharges included.
Why choose this: Maximizes a morning in Cairns with a compact outing that still leaves most of the day free for city, rainforest or beach time.

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Free cancellation

Book now, pay later

8 hrs

Transfers available

Meals included

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Multi-Day Tours

From Cairns: 4 Day PADI Open Water Dive Course with 2 Pool + 2 Outer Reef Trips [Beginner Friendly]

Earn your first PADI certification with training that blends pool skills and real reef dives.

Everything you get: Learn to dive with four open water training dives on two Outer Reef day trips, using all provided PADI materials, equipment, air fills and tuition. Enjoy chilled water, tea and coffee, plus Cairns accommodation transfers and all applicable fees, taxes and levies.
Why choose this: Leave your trip as a certified diver instead of just sampling scuba, so one booking gives you a complete beginner to diver journey.

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Free cancellation

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4 days

Transfers available

Pickup available

Meals included

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Sightseeing Cruises

Cairns to Green Island Half Day Cruise with Activity Upgrades

Tip: Don't just use the jetty to arrive and depart. Take a few minutes to walk along it and look down into the water. You can often spot schools of fish, sometimes rays, reef sharks, and even turtles.
This experience is not wheelchair accessible.
This experience is pram/stroller accessible.
Service animals are allowed on this experience.
Guests over 16 years of age can travel without adult supervision. However, photo identification will be required at check in.
Guests over 18 years of age must be with guests under 16 years of age at all times.

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4 hrs

Guided tour

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Sightseeing Cruises

#Cairns to Green Island Full/Half-Day Cruise with Glass Bottom Boat Tour

Reef island cruise suited to families and non-swimmers, with reef viewing and time to explore ashore at your pace.

Starting point: Board at Reef Fleet Terminal, Cairns.
Sights covered: Cruise from Cairns across the Great Barrier Reef to Green Island, enjoying ocean views and the island on the horizon.
Everything you get: Snorkeling demonstration and reef presentation en route to Green Island, 30-minute glass-bottom boat tour, self-guided walk on island trails.
Upgrades: Upgrade from half-day to full-day for a longer 5-hour stay on Green Island, or add buffet lunch with vegan, halal, vegetarian, gluten-free options.

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4 hrs - 8 hrs

Guided tour

Meals included

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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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8 hrs - 8 hrs 30 mins

Guided tour

Transfers available

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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Free cancellation

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8 hrs 30 mins

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 .

Top diving sites at Great Barrier Reef

Marine life you’ll see during your dive

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

From Cairns [Cruise Out, Scenic Flight Back]: Half Day Moore Reef Tour with Activities & Lunch

From Cairns: 4 Day PADI Open Water Dive Course with 2 Pool + 2 Outer Reef Trips [Beginner Friendly]

Cairns to Green Island Half Day Cruise with Activity Upgrades

#Cairns to Green Island Full/Half-Day Cruise with Glass Bottom Boat Tour

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

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

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