Port Douglas: Great Barrier Reef Snorkeling & Diving Cruise

Summary

Three reef sites in a day with marine biologist talks and fresh seafood lunch

You’ll swim through vibrant coral gardens at three remote Agincourt Reef sites on this small-group cruise from Port Douglas. With marine biologist guides sharing stories right in the water and time for both snorkeling or up to three dives, you’ll taste fresh prawns at lunch and maybe catch sight of minke whales if luck’s on your side. The day ends with sun-warmed skin and new stories buzzing in your head.

What’s the experience like?

I was already halfway into my wetsuit when someone pointed out the flying fish skimming beside us — just a flicker of silver in the blue. The Poseidon crew were busy sorting gear and joking about who’d spot a turtle first. Our guide, Jamie, handed me my mask and asked if I’d ever seen coral this far out from Port Douglas before. I hadn’t, not even close. There’s something about the way the air smells here — sharp with salt, but also this faint metallic tang that clings to your skin.

The first plunge at Agincourt Reef kind of stole my words. Not in that “wow” way people always say, but more like I had to just float for a second and listen to my own breathing through the snorkel. Jamie gathered us for a reef talk right there in the water, pointing out these tiny blue damselfish darting around. She told us how they’re sort of like gardeners for the coral — I tried repeating their name (Pomacentridae?) but probably butchered it; she laughed anyway. It’s wild how quiet it gets under there except for your bubbles and the distant hum from the boat.

Lunch was prawns so fresh they still smelled faintly sweet, plus focaccia and cake that disappeared fast — maybe it was just all that swimming. We drifted between three reef sites all day, each one different: one with these steep drop-offs where sunlight turned everything electric; another where clownfish hid in anemones so close you could almost touch them (but obviously don’t). At one point, someone thought they saw a minke whale shadow off in the blue — everyone got excited but it slipped away before we could be sure. That part still makes me grin thinking about it.

I liked how nobody rushed us back on board after snorkeling — people lingered on deck with tea or just watched the horizon blur into sky. There’s this feeling you get after a day trip to Great Barrier Reef from Port Douglas: salty hair, tired arms, and your mind still drifting somewhere underwater. It’s hard to explain unless you’ve been out there yourself.

Step-by-step itinerary

Day 1 — Snorkeling and diving at Agincourt Reef

• Depart from Port Douglas on Poseidon
• Visit three snorkeling and diving sites
• Certified divers complete up to three dives
• Snorkelers join guided reef interpretation tour
• Participate in marine life monitoring survey
• Enjoy morning tea, buffet lunch, and afternoon tea
• Relax on air-conditioned saloon and open deck

Top questions

How many reef sites do you visit on this cruise?

You visit three different snorkeling or diving sites at Agincourt Reef during the cruise.

Is hotel pickup included from Port Douglas?

Yes, hotel pickup and drop-off are included for hotels in the Port Douglas area.

Can beginners join or is this only for experienced divers?

Both beginners and experienced divers are welcome; introductory diving is available as well as up to three dives for certified divers.

Is lunch provided during the tour?

Yes, buffet lunch including prawns is provided along with morning tea, coffee, cake, focaccia on boarding, and afternoon tea.

Are marine biologists part of the crew?

Yes, marine biologist guides lead reef interpretation talks and guided snorkel tours at each site.

Can you swim with minke whales on this tour?

If dwarf minke whales are encountered during the trip, guests can swim with them thanks to a special permit.

What should I bring for this Great Barrier Reef tour?

You should bring towel, swimmers (swimsuit), sunscreen, and a hat.

Is snorkeling equipment provided?

Yes, all necessary snorkeling equipment is included in your tour package.

Are vegetarian meal options available?

Vegetarian options are available; please advise any dietary requirements when booking.

What’s included

Your day includes hotel pickup and drop-off within Port Douglas, use of all snorkeling equipment (or dive gear if booked), guided snorkel tours led by a marine biologist at each site plus reef interpretation talks onboard. You’ll enjoy morning tea with coffee and cake as you board Poseidon’s catamaran, buffet lunch featuring local prawns and fresh focaccia between swims, then afternoon tea before heading back ashore — all while exploring three unique outer reef locations.