Liveaboard Diving in Bajo Alcyone

What To Expect On a Bajo Alcyone Liveaboard

Liveaboards to Bajo Alcyone will normally be as part of a dive trip incorporating all the sites of the Cocos Islands. Virtually every liveaboard itinerary will stop here for some time, allowing divers to experience some of the best shark diving in the world. Once you jump into the pleasantly warm waters of this famous site, you'll soon realise why divers consistently sail nearly 2 days to get here. Superb visibility, incredible biodiversity, and the sight of circling groups of over 100 Scalloped Hammerheads, give this unbelievable site it's well deserved status amongst the finest scuba diving spots on the planet.

What You Can See

Live aboard dive boats come here for one main reason: Scalloped Hammerhead Sharks. Arguably there's no better place to view these incredible creatures than this isolated spot off the Costa Rican Pacific coast. Their distinct body shape form some stunning silhouettes as they swim in the sunlight above groups of divers, allowing fantastic opportunities for underwater photography enthusiasts.

The sheer numbers of Hammerheads on show will mesmerise even those that are expecting it, and even after a few dives over several days, we've yet to hear of anyone tiring at the view! They are often found in groups of over 100, a site very rarely seen across the entire globe. Liveaboard dive cruises to this region tend to last for at least 10 days, giving guests ample time to dive with these beautiful animals, as well as relax on board in style.

The Hammerheads are present all year round, although they are in their highest numbers during the wet season which runs from June through to December. The dry season however offers the best visibility and calm seas, and so in truth there really is no bad time to be underwater here.

Although the main draw is the Hammerheads (and rightly so), there's no shortage of other marine life to be seen at Bajo Alcyone in addition to the premier attraction. Manta and Mobula Rays are normally present, attracted by cleaning stations in the area. There are also several different shark species to complement what you will have already encountered - including Whitetips, Blacktips, Silvertips and Silkys. It really is a world class site, and a true pleasure to dive at, which will no doubt be one of the main highlights of any liveaboard trip to Costa Rica.

Getting to Bajo Alcyone

As it is within the Cocos Islands, some 550 kilometres from the Costa Rican mainland, diving at Bajo Alcyone is only possible on a dive liveaboard cruise. These normally depart from the port of Punterenas, a 90 minute drive from the country's capital San Jose. Guests can either arrange their own accommodation in the city and then transfer to Punterenas, although commonly liveaboard operators will include these as part of the itinerary.

Getting to San Jose is straight forward as it has a well served international airport, flying to and from many destinations across the Americas. If you are coming from elsewhere, your route will often involve changing in the United States.

Some longer term travellers will arrive in Costa Rica overland also, as it is well connected to it's neighbouring Central American countries.

Bajo Alcyone Diving Reviews

  • 8.9 Fabulous
  • 23 Verified Reviews
  • 8.0 Very good
  • Malcolm C
  • Malta Malta

Incredible - “fish soup” on an open exposed reef with ripping currents ! Challenging but very rewarding - great fun.

Diving Bajo Alcyone in July on the Okeanos Aggressor

  • 9.6 Exceptional
  • China China

1. The first time, I did not hold the rope to dive down, which was very dangerous due to heavy flow, but I saw a lot of hammerhead sharks

Diving Bajo Alcyone in September on the Okeanos Aggressor II

  • 8.8 Fabulous
  • Takashi D
  • Japan Japan

Alcyone is one of the best dive site in Cocos. Hummer head sharks, jacks, and especially I met dolphins.

Diving Bajo Alcyone in July on the Okeanos Aggressor II

  • 10.0 Exceptional
  • Michael P
  • United States United States

Regardless of the weather, sea life every dive had something to offer if you desired to take it in.

Diving Bajo Alcyone in June on the Okeanos Aggressor

  • 8.8 Fabulous
  • Dave F
  • United States United States

Alcyone was one of a couple of great dive sites. Listen to the guides; they know best.

Diving Bajo Alcyone in May on the Argo

  • 9.6 Exceptional
  • David D
  • United States United States

All diving in Cocos is great. Alcyone is a long panga ride but worth the trip.

Diving Bajo Alcyone in April on the Okeanos Aggressor II

  • 9.2 Superb
  • Mary S
  • United States United States

Pretty good. Lots of current.

Diving Bajo Alcyone in April on the Okeanos Aggressor II

  • 10.0 Exceptional
  • Natsumi U
  • Japan Japan

Other group found a lot of Hummer heads, but we saw only a few.

Diving Bajo Alcyone in February on the Sea Hunter

  • 9.6 Exceptional
  • Lena L
  • Norway Norway

Amazing dive site. Dirty Rock and Alcyone by far my favourite dive sites, followed by Manuelita on an honorable mention

Diving Bajo Alcyone in June on the Sea Hunter

  • 9.6 Exceptional
  • Andreas S
  • Switzerland Switzerland

The best dives of the trip. Hundreds of scalloped hammers schooling and circling. Epic, jaw dropping stuff!

Diving Bajo Alcyone in October on the Okeanos Aggressor

  • 8.8 Fabulous
  • Nora S
  • Hungary Hungary

Spectacular with hammerheads, lobsters, marble rays, tip sharks

Diving Bajo Alcyone in March on the Okeanos Aggressor

  • 6.0 Review score
  • Kristi S
  • United States United States

We did one dive at this site and it wasn't very memorable

Diving Bajo Alcyone in December on the Okeanos Aggressor II

  • 9.2 Superb
  • Christophe M
  • France France

Alcyone was a bit poor but December is not the season for the famous picture, however Manuelita was on fire? guides were good.

Diving Bajo Alcyone in December on the Argo Liveaboard

  • 9.2 Superb
  • Alexander S
  • Austria Austria

one of the best diving sites there

Diving Bajo Alcyone in November on the Argo Liveaboard

  • 8.4 Very good
  • Anette S
  • Norway Norway

The first morning dive in Alcyone was amazing. a lot of Galapagos shark. An real eating an octopus and many hammerheads. the visibility was actually pretty good this dive

Diving Bajo Alcyone in September on the Okeanos Aggressor

  • 9.2 Superb
  • Jesus S
  • Spain Spain

Awesome, one of the best sports to enjoy huge hammerhead schools.

Diving Bajo Alcyone in August on the Okeanos Aggressor II