Liveaboard.com

Coral Sea Liveaboard Diving

Our guests rated liveaboard diving in Coral Sea as 9.2

  • 100% Best Price Guarantee

Liveaboard Diving in Coral Sea

What To Expect On A Coral Sea Liveaboard

Coral Sea liveaboards will visit dive sites located in the world's largest living structure, the famous Great Barrier Reef (GBR). The sea stretches from the Queensland Coast in Australia to the west coast of Vanuatu.. It therefore includes the nearly 300 individual reefs and 900 islands of the GBR, a significant number of which are located far from shore and thus only accessible by liveaboard boat. Liveaboard diving in the Coral Sea allows the adventurous diver to explore much of the outer sections of the reef, which are less visited, quieter, and feature a diversity of marine life found in very few places across the globe.

The Coral Sea Underwater

With warm, clear waters, in tropical climes, the Coral Sea offers great year round diving conditions, with visibility good all the time, and sea life plentiful. A stunning array of hard and soft corals will greet each diver jumping in from a liveaboard boat, from tiny colourful polyps to gigantic fans. There's the full range of tropical fish, including Anglefish, Butterfly Fish, Clown Fish, Parrotfish, Surgeons, Triggerfish and Trout, all swimming amongst mesmerised divers in huge numbers. You'll be diving with the big stuff too, such as White Tip Sharks, Hammerheads, Manta Rays, and if the season is right - Humpback Whales and dwarf Minke Whales. Liveaboard diving in the coral sea will allow you to cruise through some of the most unpsoilt natural marine reserves known, where you'll be diving in peace and comfort. Liveaboard.com has several boats with a range of exciting itineraries, dive trips lasting from 3 days up to 8, and thus offering something to suit every time frame.

Dive Sites of The Coral Sea

If we were to list and then talk about every site for scuba diving in the Coral Sea, we could be writing for a long time! There's some wonderful places to dive, with the vast majority only accessible on board a liveaboard cruise.

Osprey Reef is renowned for it's 40m+ visibility, where shark sitings are almost a given - especially at North Horn, arguably Australia's premier site for viewing multiple species of shark - notably Hammerheads, Silkys, Grey Reefs and White Tips. If your liveaboard diving holiday is between June and November, Osprey Reef also offers a good chance of spotting Humpback Whales.

The Ribbon Reefs, to the very north of the Great Barrier Reef, have some of the most unspoilt areas for diving in the world. It's a long way from Cairns and so is worth boarding a liveaboard that lasts a few days, as there's so much to see - sea snakes, sharks and healthy coral to name but a few. If you come here during the Australian winter, it's also likely you'll be able to view dwarf Minke Whales, and some liveaboard diving operators even allow divers to participate in the important research and monitoring associated with these animals. Within the chain of ten reefs that form the Ribbon Reefs is world famous Cod Hole, a site not to be missed and sure to be on every diving itinerary in these parts. Diving at Cod Hole will allow you to come up close and personal to the giant Potato Cod that live here - they are docile, friendly and curious creatures that will be sure to make for a unique diving experience.

Diving in the Coral Sea as part of a liveaboard cruise will normally include the beautiful sites of Milln Reef and Flynn Reef, where there are stunning coral gardens sporting the full range of staghorn, table, boulder and plate coral. There's a magical and healthy range of fish here too, and sometimes dolphins and whales are seen here. Both these sites are perfect for night diving, and it's very likely that your liveaboard crew will arrange a night dive here.

Diving from a liveaboard in the Coral Sea will enable you, in the correct conditions, to visit one of the most isolated dive sites in Australia - Bougainville Reef. If the crew are able to cruise here, they'll be just as excited as the guests, as it's not always that conditions allow diving here. As a result of this, there's incredibly pristine examples of coral and underwater life, as well as a partially submerged wreck!

Top Tips For Divers

Diving in the Coral Sea is a great privilege, with a range of dives to suit all levels of experience. Even so, it's important that you bring your certification and log book so that the liveaboard crew can assess the group as a whole. Liveaboard boats in this region generally have equipment available to rent, but this should be checked prior to departure. Most international credit cards are accepted, but it's always a good idea to bring enough cash on board (the local currency is the Australian Dollar) - there are plenty of ATMs available onshore. Liveaboard diving crews can often speak a variety of languages, but the main communication will be in English - the national language.

Getting to The Coral Sea

Scuba diving trips in the Coral Sea, and liveaboard diving boats, almost always depart from Cairns, in the north east of Queensland. By far the easiest way to get here is by air, as the airport here is a big international and domestic hub, with regular flights arriving from overseas and within Australia. It's likely you'll be able to fly directly into Cairns, although if not it's straight forward to catch a flight from pretty much all over Australia.


Coral Sea liveaboards dive the largest coral reef in the world, the Great Barrier Reef. With over 1400 species of fish and a wide variety of sharks, mantas and whales, it's on nearly every divers bucket list. Cod Hole, Flynn, Milln, Osprey and Ribbon reef are often guest favourites.


Coral Sea Diving Reviews

  • Rating 9.2 out of 10
  • 9.2 Superb
  • Rating 8.8 out of 10
  • 8.8 Fabulous
  • Ken C
  • Flag of United StatesUnited States

We were the only boat that we saw in the four days in the Coral Sea - it felt as we had the sea to ourselves this trip

Diving Coral Sea in October on the Spirit of Freedom
  • Rating 8.4 out of 10
  • 8.4 Very good
  • Joseph D
  • Flag of United StatesUnited States

More beautiful than the pictures, you have to see it!

Diving Coral Sea in July on the Spirit of Freedom
  • Rating 9.6 out of 10
  • 9.6 Exceptional
  • Patricia T
  • Flag of United StatesUnited States

Unvelievable variety of fish and coral. It's like being in the Pixar film, Finding Nemo!

Diving Coral Sea in July on the Spirit of Freedom
  • Rating 10.0 out of 10
  • 10.0 Exceptional
  • Alex D
  • Flag of United StatesUnited States

The Coral Sea, with its crystal clear waters, was the perfect setting for this dive trip.

Diving Coral Sea in February on the Pro Dive Cairns


What to know about diving in Coral Sea

Where is the Coral Sea located?

The Coral Sea lies off Australia's northeast coast, bordered by the Great Barrier Reef to the west and stretching out to Papua New Guinea, the Solomon Islands, Vanuatu, and New Caledonia — making it the body of water most Coral Sea liveaboards from Cairns actually cross to reach reefs like Osprey and Bougainville.

What was the Battle of the Coral Sea?

Fought in May 1942, it was a major World War II naval battle between Allied and Japanese Imperial forces that stopped a planned Japanese seaborne invasion of Port Moresby, New Guinea — a turning point early in the Pacific War, fought in the same waters many Coral Sea liveaboards cross today.

What is the Coral Sea?

It's a marginal sea of the South Pacific Ocean off northeastern Australia, home to the Great Barrier Reef along its western edge as well as more remote, isolated reef systems like Osprey and Bougainville Reef further offshore.

Where does the Coral Sea meet the Pacific Ocean?

The Coral Sea is itself part of the South Pacific Ocean, blending into open Pacific waters to the east beyond the reefs and islands of Vanuatu and New Caledonia.

How deep is the Coral Sea?

It averages about 7,850 ft (2,394 m) deep, with a maximum depth of roughly 29,990 ft (9,140 m) — though the reefs divers actually visit, like Osprey and Bougainville, rise from that abyssal floor to within a few meters of the surface.

How big is the Coral Sea?

It covers about 1,850,000 sq mi (4,791,000 sq km), bordered by Australia, Papua New Guinea, the Solomon Islands, Vanuatu, and New Caledonia.

What countries border the Coral Sea?

Australia, Papua New Guinea, the Solomon Islands, Vanuatu, and New Caledonia (a French territory) all border the Coral Sea.

What dive sites are in the Coral Sea?

Osprey Reef, Bougainville Reef, Holmes Reef, and Flinders Reef are the best-known liveaboard destinations, all isolated coral formations well beyond the Great Barrier Reef's eastern boundary.

Is the Coral Sea part of the Great Barrier Reef?

No — the Great Barrier Reef sits along the Coral Sea's western edge, but the wider Coral Sea extends far beyond it, encompassing separate, more remote reef systems.

Is the Coral Sea a marine park?

Yes — the Coral Sea Marine Park, proclaimed in 2013 and renamed in 2017, covers about 381,988 sq mi (989,836 sq km), making it Australia's largest single marine protected area.

How do you dive the Coral Sea?

Only by liveaboard — its reefs sit far beyond day-boat range, so multi-night expeditions from Cairns are the only way to reach sites like Osprey and Bougainville Reef.

What's the visibility like in the Coral Sea?

Exceptional — often 100 ft (30 m) or more — since the Coral Sea's remote reefs sit far from any mainland runoff or sediment.

What sharks can you see in the Coral Sea?

Grey reef, whitetip reef, and silvertip sharks are common, with scalloped hammerheads aggregating seasonally at sites like Osprey Reef's North Horn.

When is the best time to dive the Coral Sea?

The season runs roughly year-round for liveaboards, though many operators favor the calmer months from around June through November, with cooler water bringing the best chance of hammerhead sightings.

Is the Coral Sea safe for diving?

Yes, for divers who follow standard open-water precautions — the main considerations are the remoteness (help is a long way off) and the currents at exposed walls, both of which liveaboard crews plan around carefully.

We’re here to help, 24/7.

Connect with our expert travel consultants to plan your next trip.

  • Oksana Kovaleva
  • Nicole Laughlin
  • Josue Zarco
  • Andrea Martinez
  • Nina Kapp
  • Farah Celada-Benito
  • Juliane Ball