Cocos Island of the Sharks

Cocos Island of the Sharks

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Cocos Island of the Sharks

Cocos Island Liveaboard Diving: Costa Rica's Shark Paradise

Cocos — just the name elicits a knowing smile from experienced divers. This UNESCO World Heritage Site sits 550 kilometers from Costa Rica in the eastern Pacific, consistently ranked among the top three dive destinations on Earth. Here’s why: nutrient-rich currents converge around volcanic seamounts, attracting schools of hammerheads so massive they fill your entire field of vision. A signature of liveaboards in Cocos Island.

This isn’t your typical dive trip. A Cocos Island liveaboard means an epic expedition to an uninhabited tropical rainforest island, the surrounding seas brimming with life, including a dozen shark species. White-tips patrol every crevice, tiger sharks cruise the depths, and whale sharks glide overhead while you’re watching hundreds of hammerheads. This is bucket-list diving. The kind that even the most experienced divers talk about for decades.

You’ll constantly hear “pura vida” here. It’s how Costa Ricans say hello, goodbye, and “everything’s okay” — a relaxed attitude toward life, no matter the circumstance. It’s the perfect mindset for this adventure, reminding us how fortunate we are to travel in this protected paradise.

That spirit starts the moment you arrive. We depart from Marina Bahia Golfito, a modern facility nestled at the rainforest’s edge near Osa Peninsula and Corcovado Park — perfect for adding a pre- or post-trip land adventure (or joining our Oceans and Rainforest expedition). During peak pelagic season (June-November), upwellings bring the best odds for whale sharks, humpback whales, and giant mantas. Yes, it’s technically “rainy season,” but afternoon showers are brief, and this is when the ocean truly comes alive.

Cocos Island Liveaboard Diving: Costa Rica's Shark Paradise
Wildlife

What Wildlife Can You See on a Cocos Island Liveaboard?

Hundreds of Hammerheads

Scalloped hammerhead sharks are the reason why most divers make the 30-hour crossing to Cocos. At sites like Bajo Alcyone, hammerheads gather at cleaning stations where butterflyfish busily pick parasites from their skin, creating opportunities for remarkably close encounters. These aren't fleeting glimpses — they linger at the cleaning stations, wave after wave of them glide past, sometimes just an arm's length away. While we can never guarantee wildlife sightings, diving during the summer season (June through November) consistently delivers the hammerhead action that's made it legendary.

Whale Sharks, Humpback Whales & Giant Mantas

May to August is considered “whale shark season”, offering chances to see the ocean's largest fish filtering plankton in the blue. Humpback whales migrate through Cocos waters during the summer months, and surface sightings between dives bring an extra dimension to the whole experience. Between June and November, giant oceanic manta rays — with wingspans reaching 7 meters — can be seen spiralling onto cleaning stations.

Numerous Sharks & Spectacular Marine Life

Beyond the hammerheads, Cocos is home to an impressive variety of sharks. Tiger sharks cruise the seamounts, identified by their distinctive stripes. White-tip reef sharks are abundant — you'll see them on almost every dive, resting on ledges or hunting small fish and crustaceans. Silky sharks, Galapagos sharks, and the occasional silvertip add to the diversity. Marble rays often appear on sandy bottoms, while enormous schools of jacks and yellowfin tuna create swirling bait balls that attract even more predators.

Possible Marine Life Sightings:

  • Scalloped hammerhead sharks
  • Large schools of jacks & tuna
  • White-tip reef sharks
  • Humpback whales
  • Tiger sharks
  • Whale sharks
  • Marble rays
  • Giant manta rays and more!
    Activities

    Cocos Island Liveaboard: Shark Diving & Island Exploration

    This is serious, world-class diving: dramatic underwater topography with seamounts, pinnacles, arches, and volcanic walls, all surrounded by some of the highest concentrations of marine megafauna in the eastern Pacific. Typically, there will be opportunities for 2 dives in the morning and 1 in the afternoon, with water temperatures of 78-82°F (27-28°C).

    Between dives, there will be several opportunities to go ashore and explore the island. During surface intervals, keep an eye out for humpback whales breaching, and relax on the sun deck. Evenings bring daily cocktail hours and marine life presentations by our top-notch guides, diving deeper into the fascinating species and ecosystems you're experiencing.

    Extend your Costa Rica adventure with our Oceans & Rainforests expedition. Diving Caño Island and exploring Corcovado National Park make a perfect pre- or post-trip extension.

    Highlights include:

    • Scuba diving
    • Island explorations & nature walks
    • Marine life presentations
    • Whale watching
    Accommodation

    Your home at sea

    Life on board

    These expeditions are based on large ocean-going liveaboard vessels. The daily action happens from smaller, fast support boats designed to get you nice and close to the dive sites, while the mothership handles everything else: comfort, food, and a good night's rest.

    Nautilus Adventures is the only liveaboard operator in the world with a certified ISM safety management system — audited annually to the same standards as the world's largest cruise ships. In short, safety is taken seriously. A full briefing and practice drill means you'll always know exactly what to do — and can spend the rest of the trip focused on the water.

    • 10 Days / 9 Nights trip: 9 nights' accommodation on a liveaboard
    • Up to 18 dives (weather dependent)
    • Tanks, weights, safety gear (Nautilus LifeLine, DiveAlert, SMB)
    • Scheduled group transfers
    • All meals and snacks
    • Non-alcoholic drinks
    • Dive guides and expert crew
    • Scuba gear rental
    • Nitrox
    • Alcoholic beverages and bar
    • Gift shop purchases
    • Internet access (US$120 per device, per trip)
    • Crew gratuities
    • Port fee (US$ 35 pp payable in cash onboard)
    • Cocos Island National Park fee (please inquire, as this changes annually)
    TRIP ITINERARY

    Cocos Island Liveaboard: Your Day-by-Day Itinerary

    Itinerary Image Itinerary for Cocos



    The Nautilus Explorer will be berthed in Marina Bahía Golfito. It's beautiful. We imagine you will be excited to board, but please give our hardworking crew time to get the ship turned around, cleaned, fuelled, provisioned, and ready for you. We ask that you take advantage of the local facilities and not drop by the boat until 6:30 pm. We don't mean to be rude, but it would be much appreciated if you could avoid coming by early to say “hi.” Boarding will begin after 6:30 pm, and we will sail by 8 pm for the approximately 30-hour run to Cocos Island.

    Your ship is a heavy steel stabilized oceangoing ship, ensuring you the best ride possible. We encourage you to relax, and it's usually a good idea to take some anti-seasickness medicine just in case. It's far better to feel 100% and enjoy the crossing than to risk feeling under the weather without medication… There will be ample time for briefings, setting up dive and camera gear, and, of course, cocktail hour at 7 pm with all our other guests!

    Anchored in the lee of Cocos Island!! Enjoy some of the best diving in the world on the pinnacles surrounding cocos. The choice of dive sites is at the discretion of the park rangers and influenced by Mother Ocean, with a lot of input from your captain and dive guides. Typically, there will be an opportunity for 2 dives in the morning and 1 in the afternoon, with water temps ranging from 78 – 82°F (27 – 28°C). Plus, there's the opportunity to go ashore several times, whale watch with the humpbacks, relax, and have a great time!!

    Voyage back to Golfito. Packing gear up, visiting with your new friends, and making plans for your next adventure with Nautilus.

    Arrival back at the Golfito marina by 5 am for those catching the early morning Sansa flight. Early breakfast and 7 am departure for guests heading back to San Jose in our courtesy shuttle (to arrive SJO by 1 pm latest). Or a more leisurely 8:30 am disembarkation for this who are staying on in Golfito (the hotel in the marina is beautiful and well-priced: Marina Bahia Golfito Hotel) or heading off for another adventure in one of the nearby national parks

    Departure dates

    Cocos Island of the Sharks

    All prices are in US dollars

    Select Departure Month
    Frequently Asked Questions

    WHAT TO BRING

    What do I need to pack?

    Personal toiletries. Dive gear (or travel light and use our rental gear!) Summer wear, noting that nights can sometimes be chilly which makes a sweater or fleece jacket a good addition. Sunscreen (reefsafe sunscreen will be available onboard with our compliments). Towels and bed linen are provided onboard. Good walking shoes are recommended if you want to go ashore on Cocos.

    What dive gear do I need to bring?

    We provide aluminum 80 cu. ft tanks and weightbelts. Larger steel rental cylinders are available. 5 mm wetsuit recommended to avoid losing body core temp during multiple days of repetitive diving. It's always better to layer down rather than be cold with no options. We have rentals onboard by prior arrangement for almost anything you need. Please make any rental requests as early as possible.

    Baggage limitations?

    Pack lightly since you will be dressing for warm tropical weather. At Customs there are no limitations on the personal equipment such as diving, camera and video equipment as well as computers that are for personal use.

    What kind of safety gear do you provide divers?

    Nautilus LifeLines, DiveAlerts and SMB safety sausages

    TRAVEL DETAILS

    Do I need a passport and/or visa?

    YES and it must be valid six months from entry. US citizens do not require an entry visa to Costa Rica. However, they must have a return ticket to exit Costa Rica within 90 days. (Either to return to your country or to go to another country). Guests visiting us from other countries may not require an entry visa also. Please check the requirements for your country.

    Do I need dive and other insurance?

    Cocos Island is a very remote area and the cost involved in evacuating a diver is very high. Guests are required to have medical and evacuation insurance from a recognized provider before participating in any of our activities. Dive Assure is our recommended carrier. They are really great and have always looked after our guests during difficult situations. Click here to purchase online. The policies are very affordable. We also highly recommend the optional purchase of trip interruption insurance, which covers everything from cancelled flights, weather delays, and lost baggage, to reimbursement if another guest has a medical issue that affects your trip. If you decline coverage, please note that we do not issue credits or refunds for anything that is beyond our immediate control.

    What airport do I fly into?

    You have several options, including Liberia and Panama City. We recommend flying into San Jose (SJO) as it is the closest and most convenient. Please don't make the mistake of flying into San Jose, California which is SJC. SJO, not SJC! (Yes, someone has made this mistake previously.)

    When should I fly in?

    At least one day prior to boarding to avoid any stress from delayed or cancelled airline flights, bad weather at the originating airport, missing luggage, etc.

    DON'T FORGET!

    What time do we disembark?

    Arrival back at the Golfito marina by 5 am for those catching the early morning Sansa flight. Early breakfast and 7 am departure for guests heading back to San Jose in our courtesy shuttle (to arrive SJO by 1 pm latest). Or a more leisurely 8:30 am disembarkation for this who are staying on in Golfito (the hotel in the marina is beautiful and well-priced: Marina Bahía Golfito Hotel or heading off for another adventure in one of the nearby national parks.

    Can I get nitrox certified before we leave on the ship?

    Yes, we could do it. This is a one day course at SeeCreatures.

    Can you accommodate special dietary requests?

    YES - with reasonable advance notice. We are pleased to accommodate vegetarian, vegan, lactose intolerance, gluten-free, no sugar, quasi-kosher and quasi-halal. We are likely unable to accommodate more esoteric special dietary requests.

    What is NOT included in the trip price?

    Our ambition is to keep your trip price as low as possible with a la carte options to cater to everyone's personal choices. Crew gratuities are not included. Neither are rentals, nitrox, internet connection, bar charges, and gift shop purchases.

    What fees do I have to pay?

    Your national park fee and the 5% tax will have been included with your pre-trip payment, so no worries about that! We never do fuel surcharges or any other additional fees. There are no fees that need to be paid onboard.

    What hotel do you recommend?

    There are so many options. It depends if you want to go straight to Golfito or enjoy adventuring through Costa Rica on a multi-day trip to Golfito. There is a reasonably priced boutique hotel right in the marina at Golfito, Golfito Bahía. Directly contact them (+ 506 4080 6090) with the code Tarifa Nautilus Explorer, for a special package only for Nautilus guests. If you want to stay over in San Jose, we recommend the Marriott Hotel Hacienda Belen, which is 15 min from the airport. Keep in mind that there are 2 different Marriott Hotels in San Jose. We work with the Hacienda Belen. We recommend contacting our concierges for assistance and recommendations with your hotel booking.

    How do I get from SJO to the local hotel in San Jose?

    If you decide to stay in San Jose after arrival, we recommend taking a metered taxi (official taxi) from the departure hall to the Marriott Hotel Hacienda Belen

    How do I get from SJO to Golfito?

    Choose between connecting flights with Sansa Airlines (with some luggage restrictions), a private car with a driver, a multi-day tour of Costa Rica, or our courtesy shuttle on the afternoon of boarding (meeting at the Marriott Hotel Hacienda Belen) directly to Golfito. Our concierges are on standby to assist with your arrangements

    What time can I board the ship?

    After 6:30 pm on departure day. We are excited to see you and imagine you will be excited to say hello and get your luggage onboard. However, please allow our super hardworking crew time and space to prepare the ship and resist the temptation to come by before 6:30 pm. The ship sails at 7 pm.

    What's the crossing like?

    It's an open ocean crossing to Cocos Island Costa Rica. It can be smooth or it might be rough or more likely, something in-between. The Explorer is our flagship that has steamed through everything, from the current-swept chilly waters of Alaska to adventuring down to Clipperton Atoll, just north of the equator. We highly recommend the scopolamine "patch" and a glass of red wine to relax and have a snooze on the crossing. During the trip, we anchor in the calm anchorage behind Cocos.

    ABOUT DIVING

    What dive experience is needed?

    50 logged dives and advanced open water is the bare minimum experience required to safely dive around Cocos Island. More experience is better and all divers should have good buoyancy skills. The diving can be challenging. There could be strong current on some dives. Some of the dive sites are in open water and exposed to the swell. The difference between Cocos and a destination such as Socorro is that there is no navy base or airstrip on the island which means that airplane medevac is not possible. If you have a medical issue, the boat will have to return to port or at least be met part way by fast boat. For all these reasons, these trips are best suited for good experienced divers. Don't worry if you don't feel that you are quite ready yet for Cocos!! Come and visit us in Baja, Sea of Cortez and Socorro and we will get you all tuned and tweaked up for this great adventure!!!

    Do I need to dive with a dive guide?

    Yes. At Cocos, current and visibility can change dramatically within several hours. If you were to surface unexpectedly mid-dive, there is the possibility of drifting away and needing to use your Nautilus LifeLine to get rescued. In addition to those challenges, local tiger sharks can show erratic behaviour around your safety stop at 15 feet and it's very important for our dive guides to keep a watchful eye on them. For all of these reasons, Cocos is a dive destination in which guests have to stay with our dive guides. Our dive guides are highly experienced and excellent and they will do their best to give you all the freedom and headspace you might be looking for in your diving, and of course, we are very focussed on giving shooters what they need (sorry, bad pun). Ultimately, your captain and dive guides are the final authority on whether a guest can do a specific dive or not.

    What are your safety protocols?

    Safety, excellence in guest experience and happy staff and crew are the cornerstones of our business. Nothing is more important than your safety. At Nautilus, we are proud to be the only dive operation in the world with ISM certification and external annual audit of an SMS (Safety Management System). This is the same certification as the largest cruise ships on the oceans. We operate within written processes, procedures and checklists that our captains and crew are trained into both initially and annually. Every dive starts with a briefing on a white board. We require that all divers carry LifeLines marine rescue GPS, SMBs and dive alerts. We will loan you one of ours if you are missing any of this safety equipment. We carry AEDs and extensive medical kits with a contract medical officer available shoreside via our sophisticated satellite communication system. NOTE: because of the remoteness of Cocos Island, we highly recommend a medical checkup before leaving on this trip.

    How many dives can I expect?

    Your dive schedule may vary according to weather, other dive boats and where the action is. You can generally expect 2 dives in the morning and 1 in the afternoon. Entry into the park is restricted and tightly controlled for diving allowing for not more than 65 divers in the park at any one time. An 11 days, 10 nights trip provides for 7 dive days, and 6 dive days for 10 days, 9 nights.

    s there nitrox onboard?

    Yes. It's mandatory for all divers and included for this trip

    Water temperature?

    78- 82 °F (27 – 28 °C).

    Are the boats camera friendly?

    YES, VERY! Ask about rental cameras and photo pro services.

    WHAT TO EXPECT

    What's the weather like and what clothes should I bring?

    Well, it's the rainy season in the tropics!! We recommend casual and cool attire onboard (t-shirt and shorts). It can be drizzly in the afternoons and we recommend bringing a windbreaker and a fleece vest or sweater just in case. Make sure you bring good shoes if you are interested in going ashore for a hike. It's spectacular onshore. Just wait until you see the waterfalls!

    Is there internet and WhatsApp onboard?

    Yes. Internet and WhatsApp connection are available for $120 per trip. Please keep in mind that a satellite tracking system at sea only gives limited speed internet access. You won't be able to stream Netflix!!

    Is there a fuel surcharge?

    Of course not! We figure that dive boat companies that with fuel, surcharges year-in, year-out are just taking an extra fee onto the trip.

    What's an appropriate crew tip?

    US$ 400 - $500.

    More questions?

    Contact our concierges. They will be in touch in the regular way pre-trip to assist with logistics, pre and post activities, transfers and so on. Phone: +1 (604) 241-1918 - Please ask for our concierges. WhatsApp: +52 (624) 129-9243 Email: concierge@nautilusdive.com

    Our pre trip information package covers everything from boarding instructions to what to pack and general trip details. Please review it carefully for the most up to date information about your upcoming adventure.

    Costa Rica – Cocos Island of the Sharks

    Costa Rica – Cocos Island of the Sharks

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    Guest Feedback
    Adam August 24, 2025
    Cocos Island of the Sharks

    Cocos - Island of the sharks.

    this was a great trip. i just wish they did dos amigos pequena more dives.. that place rocks!!!!!!!

    Margaret August 24, 2025
    Cocos Island of the Sharks

    Cocos - Island of the sharks.

    To Carlos who showed us one of his dive sites, THANK YOU for a special dive with some silver tip sharks, and some mantas! That dive is a big...

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    Clark August 24, 2025
    Cocos Island of the Sharks

    Cocos - Island of the sharks.

    Just a big thank you to the crew - we all had a great trip.

    Cory August 12, 2025
    Cocos Island of the Sharks

    Cocos - Island of the sharks.

    This will certainly be a trip I will never forget - Carlos, Ima, Osa, Ramon, Beto, Luis - numero UNO! Muchos, Muchos Gracias!! Hope to se...

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