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Cocos Island, Costa Rica


One of the best diving in the world!

Cocos, liveaboard diving destination for scuba divers eager for hammerhead sharks

Cocos is an uninhabited island located in the eastern Pacific, 340 miles southwest of Costa Rica, surrounded by deep waters and lapped by strong currents. Its extremely humid and changeable climate and the oceanic character of the island make travel and dive challenging. Cocos is a destination for experienced divers. The only way to dive in Cocos Island is by cruise with one of the few liveaboards operating in the region.

The journey from Puntarenas, departure port on the west coast of Costa Rica takes 32-36 hours, sea conditions can be difficult during the crossing. The scheduled cruises generally last 10 nights, the diving days are 7, the rest of the time is spent on the round trip.

In Cocos you go to see the pelagic, especially hammerhead sharks, but also sharks, manta rays, and huge schools of fish. Whale sharks, marlins and dolphins have been spotted on some occasions. The depths of the island are rich in pinnacles of volcanic rock, the best of diving is found between 15 and 30 meters deep, around these pinnacles. Visibility varies from 15 to 30 meters. All dives, up to 4 per day, for a total of about 24, are carried out by tenders. Night nights are not possible at the moment. The water temperature varies from 22 to 27 degrees, with termoclines.

Understanding Cocos diving season

The best time to visit Cocos is from June to November with August being the best month ever. In these months the waters are very rich in nutrients that attract large schools of hammerhead sharks, the main attraction of the island. Unfortunately the period coincides with the rainy season. Precisely due to the suspension caused by the plankton, the visibility in this period drops to 15 meters. On the surface, rains and winds can cause rough seas and difficult conditions on board.

From December to May it rains less, although the climate in this area is very unstable, visibility is better and navigation is less difficult, but the number of pelagics decreases significantly.

Dive cruises in Cocos Island

Liveaboards operating diving cruises in Cocos:

Okeanos Aggressor I & II

The Okeanos Aggressor I is 36 meters long, has 8 double / twin cabins and one quadruple cabin, for a total of 22 divers. The Okeanos Aggressor II is 40 meters long, has 8 deluxe double / twin cabins, 1 master with double bed, 02 suites, one with separate beds and one with double bed, for a total of 22 passengers.

Both Okeanos Aggressors are stable and suitable for offshore sailing, an essential feature for trips to Cocos. The Okeanos Aggressors have an air-conditioned lounge, sundeck for relaxation and a dive deck. The stay on board includes full board, soft drinks, beer and wine at dinner.

Okeanos Aggressor I has been in service in Cocos since 1998, Okeanos Aggressor II since 2010.


Sea Hunter Liveaboard

Sea Hunter was born to serve oil platforms in the Gulf of Mexico, stable and robust, with powerful engines, it is the ideal boat for navigation in the Pacific. In 1994 Sea Hunter was converted into a luxury yacht for liveaboards, 38 meters long accommodating 20 guests in 10 cabins. Much loved by photographers for private spaces for cameras and individual rinse tanks.


Argo Liveaboard

Argo was set up with the experience gained by the owners on the Sea Hunter, forming a good mix between a work boat and a luxury yacht. Robust and with excellent seaworthiness, 40 meters long, Argo has 9 cabins for 18 guests, a large deck for leisure and diving, a room dedicated to photographers and for the recharging and maintenance of cameras, an air-conditioned lounge where meals are taken . Argo has a submarine for exploration at great depth.

Sea Hunter and Argo are equipped with hydraulic stabilisers, which allow to reduce the roll when they are stopped at anchor in Cocos, making life on board more comfortable.


Hammerhead sharks in Cocos Island
The best time to spot hammerhead sharks? In August, when the waters are rich in nutrients that attract large schools of hammers, the island's main attraction in Cocos
Cocos Island aerial view
Cocos Island is one of the best 10 scuba diving spots in the world according with PADI
Whale sharks in Cocos Island
Whale sharks are frequently spotted from June to November in Cocos Island
Dolphins in Cocos Island
Bottlenose dolphins are the most playful of all the species of dolphins in Cocos island
White tip sharks in Cocos Island
Whitetip shark is the dark knight of Cocos Island
Mantas in Cocos Island
Giant Manta Ray -manta birostris- is commonly spotted in Cocos Island
Tour extension in Cocos Island 1
We are happy to program a land tour extension after cruise or a very special tour in Costa Rica for your significant other if she/he does not dive
Tour extension in Cocos Island 2
A very special tour in Costa Rica for nature lovers and photographers
Tour extension in Cocos Island 3
After your dive cruise a land tour extension in Costa Rica
Cocos Island by liveaboard diving
The remote Cocos Island is easily reached by liveaboard


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Cruising Indonesia - diving and liveaboards