Poseidon Outer Reef Cruises

Dive & Snorkel Day, Agincourt Ribbon Reefs · Port Douglas

4.7 / 5 | GuestTours Rating
Dive & snorkel
Certified and introductory dives
3 reef sites
Agincourt ribbon reefs and/or Escape Reef
8:30 AM to 4:30 PM
Mon, Wed and Fri · check in 8:00 to 8:15am
From $328
per adult · children $238
Our Review

The short version

Poseidon is the Port Douglas boat to pick if you came here to dive. It visits three reef sites in a day, at the Agincourt ribbon reefs and/or Escape Reef, with a Reef Biosearch marine biologist briefing at every site. Snorkellers are covered too, with premium snorkel gear, instruction and a guided snorkel tour in the fare. It only sails Monday, Wednesday and Friday.

See full review ↓

GuestTours Verdict
GuestTours award: Best for Divers. GuestTours rating: 4.7 / 5.
Poseidon Outer Reef Cruises
Dive & Snorkel Day · Port Douglas
4.7 / 5 GuestTours Rating
Poseidon Outer Reef Cruises
Fares
Adult
per person
$328
Child
4–14 years
$238
Infant
3 years and under
Free

Sails Monday, Wednesday and Friday. A fuel surcharge of $10 per adult and $5 per child (4 to 14 years) is collected at check-in on the day of travel, on top of the fare. The Marine Park Environmental Management Charge is already in the fare.

Inclusions

What your fare covers

  • Return coach transfers from Port Douglas accommodation
  • Return cruise from Port Douglas Marina to three reef sites
  • Morning tea and coffee with fresh muffins and focaccia on boarding
  • Tropical buffet lunch with prawns
  • Afternoon tea with cake and a tropical fruit platter
  • Premium snorkelling equipment (mask, snorkel and fins) and instruction
  • Guided snorkel tour
  • Lycra suits and flotation devices
  • Prescription masks at no extra cost
  • Premium dive equipment and wetsuit with the full gear dive options
  • Reef Biosearch marine biologist site brief and interpretation at each reef site
  • Hot freshwater showers
  • The chance to observe and take part in a GBRMPA monitoring survey
  • Marine Park Environmental Management Charge of $8.50 per person
Who It's For

Is this the right reef day for you?

Great fit
🤿
Certified divers
Three reef sites, and three dives with full gear add $128 to the fare.
Great fit
👨‍👩‍👧
First-time divers
Introductory diving with dive gear and wetsuit adds $98 for one dive or $186 for two.
Great fit
⛵
Snorkellers travelling with a diver
Premium snorkel gear, instruction and a guided snorkel tour are in the base fare, so you both get a proper day.
Look elsewhere
⚠️
People who want a pontoon
Poseidon is a boat-based dive and snorkel day. Quicksilver runs the platform, underwater observatory and semi-submarine.
Look elsewhere
🚫
Anyone set on a sailing boat
Sailaway is the one that sails.
Your Day

How the day runs

Times follow Poseidon’s published itinerary and may vary depending on which reef sites are visited on the day.

8:00 to
8:15 AM
Arrive at Port Douglas Marina
Check in for your boarding passes and board the vessel. Tea, coffee, muffins and focaccia are served until departure.
8:30 AM
Depart for the outer barrier reef
Wharf Street, Port Douglas Marina, heading out to Agincourt Reef.
10:20 AM
First reef site
A marine biologist briefs the site before you get in. Snorkel or dive.
11:30 AM
Second reef site
A short transit at 11:20am, then a fresh briefing and back in the water.
12:00 PM
Tropical buffet lunch
A buffet lunch with prawns is served.
1:30 PM
Third reef site and guided snorkel tour
Transit at 1:20pm. The guided snorkel tour runs here, and afternoon tea is served.
2:40 PM
Head for home
Everyone is back on board at 2:30pm for the final passenger count, then the return run begins.
4:30 PM
Back at Port Douglas Marina
Return coach transfers to Port Douglas accommodation are included in the fare.
Practical Information

Before you go

🚢
Departure point
Port Douglas Marina, Wharf Street
🕗
Check-in time
Arrive between 8:00 AM and 8:15 AM for boarding passes and boarding
🚢
Departure time
8:30 AM
🕗
Return time
4:30 PM at Port Douglas Marina
📅
Days of operation
Monday, Wednesday and Friday. Poseidon does not operate on Christmas Day.
🐠
Reef sites
Three sites at the Agincourt ribbon reefs and/or Escape Reef
🛥
The boat
24 metre vessel, maximum 65 passengers, repowered in September 2024
👶
Ages
Child fare 4 to 14 years. Children 3 and under travel free. Minimum age for diving is 12.
🚌
Transfers
Return coach transfers from Port Douglas accommodation are included. From Cairns and the northern beaches they are $41 adult and $36 child.
⛽
Fuel surcharge
$10 per adult and $5 per child (4 to 14 years), collected at check-in on the day of travel, on top of the fare
🤿
Dive gear
Premium dive equipment and wetsuit come with the full gear dive options. Tanks and weights only is also available
Full Review

The full review

Poseidon is the Port Douglas boat to pick if you came here to dive. It visits three reef sites in a day, at the Agincourt ribbon reefs and/or Escape Reef, with premium dive equipment and wetsuits on the full gear options and a Reef Biosearch marine biologist briefing every site. Certified diving with full gear adds $72 for one dive and $128 for three, which is good value once you are already out there, and introductory dives are on offer too. Snorkellers are covered as well: the fare includes premium snorkel gear, instruction and a guided snorkel tour. Guests also get the chance to observe and join a GBRMPA reef monitoring survey. Two things to plan around: it only sails Monday, Wednesday and Friday, and the operator pitches it at experienced divers and confident snorkellers.

Frequently Asked Questions

Poseidon Outer Reef Cruises FAQs

Diving is added on top of the snorkel and cruise fare, and the fare plus the add-on equals the operator's dive price. Certified diving with dive gear and wetsuit adds $72 for one dive, $104 for two and $128 for three, which makes $400, $432 and $456 with the adult fare. With tanks and weights only it adds $61, $93 and $117 ($389, $421 and $445). Introductory diving with dive gear and wetsuit adds $98 for one dive and $186 for two ($426 and $514). The minimum age for diving is 12.
No. Poseidon runs introductory dives, with dive gear and wetsuit included in the introductory dive price. The minimum age for diving is 12. The operator pitches the day at experienced divers and confident snorkellers.
Three, at the Agincourt ribbon reefs and/or Escape Reef.
Arrive at Port Douglas Marina between 8:00am and 8:15am to check in and board. Poseidon departs at 8:30am.
Poseidon is back at Port Douglas Marina at 4:30pm. Times can vary depending on which reef sites are visited.
Monday, Wednesday and Friday. Poseidon does not operate on Christmas Day.
A maximum of 65 passengers.
Return coach transfers from Port Douglas accommodation are included in the fare. From Cairns and the northern beaches they cost $41 per adult and $36 per child.
Yes. Morning tea with muffins and focaccia on boarding, a tropical buffet lunch with prawns, and afternoon tea with cake and a tropical fruit platter.
Yes, $10 per adult and $5 per child (4 to 14 years), collected at check-in on the day of travel, on top of the fare. It is not part of your booking total.
Yes. The base fare is a snorkel and cruise fare, and premium snorkelling equipment, instruction and a guided snorkel tour are included. A marine biologist gets in the water with snorkellers.
Yes, there are hot freshwater showers on board.
Poseidon gives guests the chance to observe and take part in a GBRMPA reef monitoring survey during the day.
Yes, the $8.50 per person Environmental Management Charge is built into the fare. It applies to everyone aged 4 and over.
The child fare covers ages 4 to 14. Children 3 and under travel free.
A 24 metre vessel carrying a maximum of 65 passengers, repowered with two new generation engines in September 2024.
No. Lycra suits and flotation devices are provided, and prescription masks are available at no extra cost. A wetsuit comes with the full gear dive options.
Poseidon holds a special permit that allows guests to swim with dwarf minke whales if they are encountered. It is a chance meeting rather than something anyone can promise you.
Poseidon Outer Reef Cruises
Dive & Snorkel Day · Port Douglas
4.7 / 5 GuestTours Rating
Poseidon Outer Reef Cruises
Fares
Adult
per person
$328
Child
4–14 years
$238
Infant
3 years and under
Free

Sails Monday, Wednesday and Friday. A fuel surcharge of $10 per adult and $5 per child (4 to 14 years) is collected at check-in on the day of travel, on top of the fare. The Marine Park Environmental Management Charge is already in the fare.

Before you book

Planning guides from our team in Cairns

We live in Cairns and we book these tours every week. These are the guides we send guests before they choose.

CostsWhat a Reef Tour Costs

Half-day to premium, and where the extras hide.

Read the guide → When to goBest Time to Visit Cairns

Month by month, with the honest trade-offs.

Read the guide → SafetyIs Snorkelling the Reef Safe?

Flotation vests, age limits and the rules on board.

Read the guide → PlanningHow Many Days in Cairns?

Four is the minimum, five is the sweet spot.

Read the guide →

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