Destinations Turtle Species When to Go
Find turtle tours →

Sea turtle tours worldwide · Free cancellation

Cairns · Port Douglas · Year-round

Swim With Turtles on the Great Barrier Reef, Australia

The Great Barrier Reef is one of the best places on earth to swim with turtles. Six of the world's seven sea turtle species live along the reef, and green and hawksbill turtles are a regular sight on the coral gardens off Cairns, Port Douglas and the southern reef. Snorkel day trips reach the Outer Reef and reef islands where turtles feed and rest, and sightings are reliable in every season.

Green, hawksbill & loggerhead turtles Outer Reef & islands Cairns & Port Douglas From $108 Year-round

Check Availability

8 reef tours
$108 starting price
Year-round turtle season
6 species of sea turtle

Swim With Turtles in Great Barrier Reef

Cairns: Great Barrier Reef Premium Snorkeling Cruise, swim with turtles in Great Barrier ReefTop Pickfrom $190

Cairns: Great Barrier Reef Premium Snorkeling Cruise

★★★★★4.8(3724 reviews)·Full day
  • Cruise to the Outer Great Barrier Reef from Cairns
  • Snorkel with green and hawksbill turtles on the coral
  • Two reef sites, lunch and gear included
  • The most-booked Great Barrier Reef trip
Check Availability →
Cairns: Great Barrier Reef Half-Day Snorkeling Tour, swim with turtles in Great Barrier Reeffrom $124

Cairns: Great Barrier Reef Half-Day Snorkeling Tour

★★★★★4.7(1690 reviews)·Full day
  • A shorter half-day reef trip from Cairns
  • Snorkel with turtles and coral fish
  • Gear and guide included
  • Great value for a first reef taste
Check Availability →
Port Douglas: Outer Great Barrier Reef Snorkeling Cruise, swim with turtles in Great Barrier Reeffrom $220

Port Douglas: Outer Great Barrier Reef Snorkeling Cruise

★★★★★5(820 reviews)·Full day
  • Sail to the Outer Reef from Port Douglas
  • Snorkel with turtles on pristine coral
  • Top-rated 5-star cruise with lunch
  • Marine biologist guides on board
Check Availability →
Cairns: Silverswift 3 Great Barrier Reef Sites in One Day, swim with turtles in Great Barrier Reeffrom $213

Cairns: Silverswift 3 Great Barrier Reef Sites in One Day

★★★★★4.7(591 reviews)·Full day
  • Snorkel three Outer Reef sites in one day
  • Turtles, coral gardens and reef walls
  • Lunch, gear and guides included
  • A fast catamaran from Cairns
Check Availability →
Bundaberg: Lady Musgrave Island Great Barrier Reef Tour, swim with turtles in Great Barrier Reeffrom $239

Bundaberg: Lady Musgrave Island Great Barrier Reef Tour

★★★★★4.8(350 reviews)·Full day
  • Sail to Lady Musgrave Island on the southern reef
  • Snorkel a coral lagoon full of turtles
  • Glass-bottom boat, lunch and gear included
  • A quieter corner of the Great Barrier Reef
Check Availability →
Port Douglas: Cape Tribulation Ocean Safari Reef Adventure, swim with turtles in Great Barrier Reeffrom $150

Port Douglas: Cape Tribulation Ocean Safari Reef Adventure

★★★★★4.9(203 reviews)·Full day
  • Small-group reef safari off Cape Tribulation
  • Snorkel the reef where turtles feed
  • Two snorkel stops with a marine guide
  • Where the rainforest meets the reef
Check Availability →
Cairns: Green Island Snorkeling & Glass-Bottom Boat, swim with turtles in Great Barrier Reeffrom $108

Cairns: Green Island Snorkeling & Glass-Bottom Boat

★★★★★4.3(103 reviews)·Full day
  • Day trip to Green Island off Cairns
  • Snorkel the reef with turtles and fish
  • Glass-bottom boat for non-swimmers
  • Budget-friendly reef and island day
Check Availability →
Agnes Water / 1770: Southern Great Barrier Reef Snorkeling Day Trip, swim with turtles in Great Barrier Reeffrom $207

Agnes Water / 1770: Southern Great Barrier Reef Snorkeling Day Trip

★★★★★5(26 reviews)·Full day
  • Snorkel the quiet southern Great Barrier Reef
  • Turtles, coral and clear water
  • Top-rated 5-star small-group day
  • Gear, lunch and guide included
Check Availability →

How Much Does It Cost to Swim With Turtles on the Great Barrier Reef?

Reef day trips vary by gateway and boat, from a short Cairns snorkel to a premium Outer Reef cruise or a southern-reef island day. All include gear and free cancellation.

Most options
Cairns & Green Island
$108 – $213

Day trips from Cairns to the Outer Reef or Green Island, snorkeling coral gardens where turtles feed. From a short half-day to a three-site cruise.

Port Douglas reef cruises
$150 – $220

Cruises to the Outer Reef and Cape Tribulation from Port Douglas, with marine-biologist guides and quieter reef sites.

Southern reef islands
$207 – $239

Day trips to the quieter southern Great Barrier Reef, snorkeling the coral lagoons of Lady Musgrave Island and the reefs off Agnes Water and 1770.

What affects the price?

Which gateway

Cairns has the most options and the cheapest day trips; Port Douglas and the southern-reef islands cost more for quieter reefs.

Half or full day

A short half-day snorkel costs far less than a premium cruise with several reef sites and a marine biologist on board.

Reef fees

The reef has an environmental management charge and, in stinger season, a stinger suit, usually built into the tour price.

Bottom line: For most people a Cairns Outer Reef cruise around $190 is the sweet spot for turtles and coral. Choose Port Douglas or the southern-reef islands for quieter reefs, or a Cairns half-day if the budget is tight.

Which Great Barrier Reef Tour Is Right for You?

Tour Duration Group size Best for Rating From
Cairns premium Outer Reef cruise Full day Group Most-booked all-rounder 4.8★ $190 Check →
Cairns half-day snorkel Half day Group A quick reef taste 4.7★ $124 Check →
Port Douglas Outer Reef cruise Full day Group Top-rated, quieter reef 5.0★ $220 Check →
Silverswift 3 reef sites Full day Group Most reef sites in a day 4.7★ $213 Check →
Lady Musgrave Island Full day Group A southern coral lagoon 4.8★ $239 Check →
Green Island snorkel Full day Group Cheapest, reef island 4.3★ $108 Check →
Agnes Water / 1770 southern reef Full day Small A quiet southern day 5.0★ $207 Check →

Sea Turtle Species & Best Months in Great Barrier Reef

Species January–March April–June July–September October–December Likelihood
Green Sea Turtle Common Common Common Common Near-guaranteed
Hawksbill Turtle Regular Regular Regular Regular Regular
Loggerhead Turtle Occasional Occasional Occasional Occasional Southern reef
The Great Barrier Reef is home to six of the world's seven sea turtle species: green, hawksbill, loggerhead, flatback, olive ridley and the rare leatherback. Snorkelers most often meet green turtles grazing the reef and hawksbills feeding on sponges, while loggerheads nest on the southern reef islands. All are protected, so keep your distance, stay off the coral, and never touch or chase them.

What to Expect on the Day

1

Board at the gateway

Cruises leave from Cairns or Port Douglas marinas, or from Bundaberg and 1770 for the southern reef. Most include hotel pickup.

In stinger season (Nov–May) wear the lycra stinger suit the crew provides.
2

Cruise to the reef

Ride out to the Outer Reef or a reef island, anywhere from 45 minutes to two hours depending on the trip.

3

Snorkel with turtles

Snorkel the coral gardens and reef flats where green and hawksbill turtles feed, with a guide or marine biologist pointing them out.

4

More reef and lunch

Move to a second or third reef site, with lunch on board and often a glass-bottom boat for non-swimmers.

No turtle sighted? The Great Barrier Reef has resident turtles across its reefs and islands, so sightings are reliable on a snorkel day. Green turtles in particular are seen on most trips. For the highest concentrations, the reef islands like Green Island and Lady Elliot are the surest bets.

Sea Turtle Behaviors to Watch For

Grazing the Coral Gardens

Green turtles graze the algae and seagrass on the reef flats and coral gardens, where snorkelers watch them feed from the surface.

On the reef
Cleaning Stations

Turtles pause at reef cleaning stations, where wrasse and other fish pick algae off their shells. One of the best moments to watch, from a distance.

On the reef
Surfacing to Breathe

Turtles rise for air every few minutes to about an hour. Give them a clear path to the surface and never crowd the space above one.

On every snorkel
Nesting on the Islands

From November to March, green and loggerhead turtles nest on the southern reef islands such as Lady Elliot and Heron, viewed on guided night tours, not in the water.

Nov–Mar, southern islands

What to Bring (and What to Leave at Home)

✓ Bring

  • Reef-safe (oxybenzone-free) sunscreen
  • Swimsuit worn under your clothes
  • Towel and a change of clothes
  • Waterproof phone case or GoPro
  • Motion-sickness tablet for the reef crossing
  • A hat and layers for the boat
  • Your booking voucher (printed or phone)

✗ Leave at home

  • Regular sunscreen (harmful to the coral)
  • Anything you would touch a turtle or the coral with
  • Single-use plastics
  • Your own stinger suit; the crew provides one in season
Seasickness tip: The crossing to the Outer Reef can be bumpy in the trade winds. Take a tablet the night before or on the day if you are prone, and pick a larger, faster boat for a steadier ride.

Where Tours Depart From

Port / AreaDetailsBest for
Cairns The main reef gateway, with the most day trips and the widest price range. Outer Reef and Green Island
Port Douglas A smaller town an hour north of Cairns, closer to quieter Outer Reef sites. Quieter Outer Reef cruises
Agnes Water / 1770 The gateway to the southern reef, with fewer crowds. Southern reef day trips
Bundaberg The launch for Lady Musgrave Island and its coral lagoon. Lady Musgrave Island
The reef runs 2,300 km along the Queensland coast, so pick one gateway per trip. Cairns and Port Douglas in the north have the most day trips; Agnes Water, 1770 and Bundaberg reach the quieter southern reef and its turtle islands like Lady Elliot.

How to Choose an Ethical Tour

What ethical operators do

  • Brief a strict no-touch, no-chase policy
  • Keep a respectful distance from turtles
  • Never block a turtle’s path to the surface
  • Require reef-safe sunscreen from all guests
  • Cap group sizes for calmer encounters
  • Support reef and sea-turtle conservation

Red flags to avoid

  • Let guests touch, ride, or chase turtles
  • Feed turtles to lure them in
  • Crowd or corner a turtle in the water
  • Stand on coral or trample seagrass
  • Oversized groups with no guide in the water
  • Any “hold a turtle” photo op

Best Shore Spots to See Turtles in Great Barrier Reef

These shore and reef spots let snorkelers and beachgoers find sea turtles in Great Barrier Reef without a boat. Keep your distance and never touch a resting turtle.

Green Island

Reef island turtles

A coral cay off Cairns with a reef right off the beach where green turtles graze. Reached by a short ferry, with snorkeling and a glass-bottom boat.

💡 Snorkel the reef edge off the jetty; turtles feed on the seagrass flats.

Fitzroy Island

Turtle rehab

A rainforest-and-reef island off Cairns with fringing reef, turtles and a turtle rehabilitation centre you can visit.

💡 Snorkel Nudey Beach and visit the turtle hospital between swims.

Michaelmas Cay

Bird & turtle cay

A sand cay and bird sanctuary on the Outer Reef off Cairns, ringed by coral where turtles and reef fish gather.

💡 A common stop on Outer Reef cruises; snorkel the cay's sheltered side.

Lady Elliot Island

The turtle island

A coral cay at the southern tip of the reef, famous for turtles and manta rays, with green and loggerhead turtles nesting from November to March.

💡 Reached by light plane; the house reef has turtles right off the beach.

Lady Musgrave Island

Coral lagoon

A southern reef cay with a huge sheltered coral lagoon, snorkeled from Bundaberg, full of turtles and reef fish.

💡 The lagoon is calm and clear, good for beginners and turtle sightings.

Great Barrier Reef Turtle Snorkeling Map

FAQ: Swimming With Turtles in Great Barrier Reef

What is the price of swimming with turtles on the Great Barrier Reef?

⌄
Reef snorkel day trips start at about $108 for a Green Island trip from Cairns, with Outer Reef cruises around $124 to $220 depending on the boat and how many reef sites you visit. Southern-reef island days to Lady Musgrave run up to about $239. Every tour includes gear and free cancellation up to 24 hours before.

Where is the best place to swim with turtles on the Great Barrier Reef?

⌄
From Cairns, Green Island and the Outer Reef are reliable, and Fitzroy Island has a turtle rehab centre. Port Douglas reaches quieter Outer Reef sites. On the southern reef, Lady Elliot Island is famous as a turtle and manta island, and Lady Musgrave has a coral lagoon full of turtles.

How many turtles will I see?

⌄
Green turtles are a regular sight on almost every reef trip, grazing the coral gardens and reef flats, with hawksbills on the coral. Six of the world's seven turtle species live on the reef, so the Great Barrier Reef is one of the most turtle-rich places you can snorkel.

What is stinger season, and do I need a suit?

⌄
From about November to May, box jellyfish and Irukandji can be in the water off the Queensland coast. Reef tours provide a lycra stinger suit to wear while snorkeling, which also gives sun protection. Outside those months a suit is optional. Always follow the crew's advice.

What is the best time of year to visit the reef?

⌄
Turtles are on the reef year-round. The dry season from June to October brings the calmest, clearest water and cooler air. The wet season from November to April is warmer with more rain and stinger season, though snorkeling runs all year with a stinger suit.

Is the snorkeling good for beginners?

⌄
Yes. Reef cruises carry life vests, flotation aids and guides, and many have a glass-bottom boat for non-swimmers, so beginners and children manage well. Reef islands like Green Island and Lady Musgrave have calm, shallow reef right off the beach, ideal for first-time snorkelers.

More Places to Swim With Turtles in Cairns & Port Douglas

Swim with turtles in Ningaloo Reef
Ningaloo Reef
Australia · from $102
See tours →

Browse all the best places to swim with turtles worldwide, warm water year-round.

Ready to swim with turtles in Great Barrier Reef?

8+ tours · from $108 · free cancellation · instant confirmation

See all tours →