Ultimate Whale Sharks in the Sea of Cortez
Ultimate Whale Sharks in the Sea of Cortez
Liveaboard Diving and Swimming with Whale Sharks in the Sea of Cortez
This liveaboard expedition takes you deep into one of the most biologically rich seas on earth — combining scuba diving at remote pinnacles with an unforgettable day swimming among one of the largest whale shark aggregations in the region. Sailing north from La Paz through the Sea of Cortez, you’ll dive by day and transit overnight, waking somewhere new each morning.
Las Ánimas is a highlight — with deep pinnacles and dramatic topography where you’ll scan the blue for passing hammerhead sharks, and explore the shallows where playful California sea lions twirl around divers. The rarer Guadalupe fur seal are occasionally spotted here too. Las Ánimas sits beside San José Island, home to some big animals — and if we’re really lucky, even sperm whales. Depending on conditions that week, day two takes us into the Loreto National Park or further north to Isla San Ildefonso, for vibrant reefs, schooling fish, turtles, and incredible macro life.
From there, Isla San Pedro Mártir — one of the most remote islands in the Sea of Cortez. Underwater, walls draped in dense black corals give way to neon yellow carpets and sheer drop-offs — another chance to encounter hammerheads. Above water, a cactus-lined hike leads to sweeping ocean views, with the world’s largest blue-footed booby colony nesting on the cliffs around you.
Then the main event: whale sharks in Bahía de Los Ángeles — one of Mexico’s most secluded bays, hosting up to 220 whale sharks throughout the season. Snorkel alongside the world’s largest fish in waters so isolated it often feels like you have it to yourselves.
The journey home is one last reason to keep your eyes on the horizon. Running south through the open Sea of Cortez back to La Paz, these biologically rich waters are prime territory for pilot whales, finback whales, sperm whales, orcas, and mega-pods of dolphins. A fitting end to an extraordinary week at sea.
Sea of Cortez Marine Life: Whale Sharks, Hammerheads & Pelagic Giants
Isla Las Ánimas punches well above its weight. Dramatic pinnacles where, with luck, schooling hammerheads pass through from June to November. The walls and reefs are home to schools of jacks, moray eels, rays, turtles, and tuna. In the shallows, playful California sea lions and the rarer Guadalupe fur seal share the boulder gardens.
Bahía de Loreto National Park is protected by CONANP and UNESCO-listed — and for good reason. Over 800 species of fish patrol its reefs alongside sea turtles and dolphins. Its nutrient-rich waters attract everything from the smallest critters to passing whales.
San Pedro Mártir Island is the wildcard. A sheer volcanic rock rising straight out of the ocean, it sits at the meeting point of powerful currents that push nutrients to the surface — which means extraordinary marine life: groupers, seahorses, turtles, rays, and cruising hammerheads. The island's resident sea lions are less accustomed to visitors than their cousins elsewhere; they might spend the dive twirling around you — or other times they prefer the company of each other, tumbling and chasing through the shallows..
Bahía de Los Ángeles is the headline act. One of the largest gatherings of the world's largest fish — up to 220 whale sharks gather here each season between May and November, drawn in by rich plankton blooms. In this remote, protected bay, the ocean feels wonderfully wild.
Throughout the journey, keep your eyes on the horizon. Finback whales, sperm whales, orcas, pilot whales, and mega-pods of dolphins all call these waters home.
Respectful marine life encounters
Expert guides lead all wildlife experiences and operate in full compliance with Mexican marine wildlife regulations — ensuring every encounter is safe, respectful, and deeply memorable.
Observation plane
From January to October, our marine biologists conduct aerial surveys over the Sea of Cortez to support science and conservation efforts.
Possible wildlife sightings:
- Whale sharks
- Pilot, fin, & sperm whales (ocassionally)
- Schooling fish in huge numbers
- Blue-footed boobies and other sea birds
- Mega pods of dolphins
- Orcas and more!
- California sea lions
- Hammerhead sharks
Scuba diving, kayaking & island exploration in the Sea of Cortez
Diving is at the heart of it — but this trip leaves plenty of room for everything else. Up to four dives a day if you want them, with time to kayak, explore ashore, and take in the Sea of Cortez at your own pace. The choice is yours.
Sea of Cortez Scuba Diving
Expedition-style diving at its finest — volcanic seamounts and dramatic walls where hammerheads, sea lions, and huge schools of fish await. Enjoy up to 15 scuba dives throughout the week, including opportunities for night dives. Experienced dive guides are in the water on all dives to assist, so the minimum requirement is an Open Water certification with solid buoyancy control.
Swimming with Whale Sharks in Bahía de Los Ángeles
The highlight is snorkelling with whale sharks at Bahía de Los Ángeles, a CONANP-protected national park. With almost no other boats in the bay, you'll feel like you have the place to yourself as you slip into the water quietly and swim alongside the biggest fish species on the planet. Please note that whale shark experiences here are by snorkelling only; no scuba diving is permitted.
Kayaking, Paddleboarding & Island Exploration
Between dives, explore the coastline by paddle power. Single and double ocean touring kayaks and paddleboards are available throughout the trip. Experienced paddlers are welcome to head off independently within safety guidelines.
Ashore, desert hikes, remote beach walks, and exceptional birdwatching await. We're also permitted to land on Isla San Pedro Mártir — a rare privilege that allows access to one of the Sea of Cortez's most remote islands.
Calm Seas & Warm Water
Water temperatures range from the mid-70s to mid-80s°F (24°C–30°C), and the Sea of Cortez is mostly calm this time of year — glassy, unhurried, and wonderfully warm.
Highlights include:
- Snorkeling & freediving
- Swimming with whale sharks
- Kayaking & paddleboarding
- Hiking & beach walks
- Island exploration
- Birdwatching
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.
The Nautilus Explorer is a sturdy and well-appointed custom-built 132-foot vessel, designed for comfortable open ocean voyages. She accommodates up to 25 guests across 13 en-suite cabins, ranging from cosy lower deck staterooms to generous suites with large windows — and a premium suite with a lounge and full-size bathtub. All cabins are air-conditioned with private bathrooms.
The main salon and dining room are framed by beautiful large windows with million-dollar views — a great place to unwind, eat well, and watch the stunning Baja scenery go by. The sun deck has plenty of seating for everyone, a freshwater hot tub, and a huge water-level platform that puts you as close to the ocean as you can get without actually being in it.
Explore the Nautilus Explorer- 7 nights' accommodation on a liveaboard
- All activities & necessary equipment
- All meals and snacks
- Non-alcoholic drinks
- Naturalist guides
- Scheduled group transfers
- Alcoholic beverages and bar
- Gift shop items
- Internet access ($85 per device, per trip)
- Crew gratuities
- Port fee (US$ 35 pp payable in cash onboard)
Your Sea of Cortez expedition itinerary
Check in at SeeCreatures Cabo. Drop your bags anytime, but please check in by 4:30pm for your complimentary coach transfer to La Paz to your ship, where our hosties will be waiting for you on the back deck with trays of margaritas and champagne, followed by dinner and departure for the Sea of Cortez.
Four days of diving with up to four dives daily, including night dives. Traveling at night and anchoring by day, your captain and dive guides adjust the itinerary daily to maximize encounters and work with conditions.
We'll explore Isla Las Ánimas, then venture north to visit either Bahía de Loreto National Park or Isla San Ildefonso (wherever diving conditions are best that particular week), and Isla San Pedro Mártir, where we hold one of only two permits in Mexico to go ashore.
Swimming with whale sharks! We partner with authorized local operator using permitted pangas. Whale sharks gather here to feed on plankton blooms (visibility typically 30-40 feet). While we can't guarantee specific numbers—this is the ocean, not Disneyland—our success rate from June through October has been excellent.
A day at sea heading south. We'll keep watch for marine life and explore our secret spot near Mulegé, where pilot whales, dolphins, and other incredible creatures are often encountered.
Breakfast on board, then disembark in La Paz at 8 am. Complimentary transfer to either SeeCreatures Cabo San Lucas or San José del Cabo Airport (SJD) — approximately 3 hours depending on traffic. We recommend booking flights for 1:00 pm or later.
Add a Cabo Pulmo adventure to your boarding day — morning pick-up at your hotel, a two-tank dive day in this UNESCO World Heritage Site and national park, and onward transfer to your boat in La Paz.
On either side of the liveaboard, you can also add day trips or scuba courses with SeeCreatures Cabo: local two-tank dives in Cabo San Lucas, more diving at Cabo Pulmo or Gordo Banks, plus Advanced Open Water and Enriched Air Nitrox courses, and beyond.
Departure dates
Ultimate Whale Sharks in the Sea of Cortez
All prices are in US dollars
TRIP DETAILS
WEATHER
The Sea of Cortez is mostly calm this time of year. We will be traversing a lot of areas with regional variations in water temperature and wind. We will likely see water temps ranging from the mid-70s to the mid-80s. It can be very hot during the day, but this is not a problem with air conditioning on board. Comfort on board is ensured, with lots of water activities and shore activities generally scheduled for the first thing in the morning or late in the day when the temperatures are cooler. One of the coolest things about these trips is that, unlike open ocean expeditions, the waters are quite smooth, and there may be very little or no movement on the boat for days at a time.
THE WHALE SHARKS
The whale sharks aggregate in the estuary at the south end of Bahia de Los Angeles, which is a protected reserve in a CONANP national park. Interaction with the whale sharks is by snorkelling only; no diving is allowed. Visibility is typically 30 to 40 feet in the area where the whale sharks gather. Depending on the group's interest, there will either be a morning session with the whale sharks or two opportunities, morning and afternoon, to get in the water with the animals. We work together with the local dive operator, using his pangas and captains for the actual whale shark interaction. We always reserve our trips with him ahead of time, but this is a small place in the middle of nowhere, and Ricardo and his team are not always available when booked. We always get our guests in the water, but there are sometimes delays.
AIRPLANE SUPPORT
Our team will be in the air at least two days a week during your trip, with constant contact with the ship's captain. Your pilot and observer enhance the experience by providing insights on the marine environment, with opportunities to encounter finback and sperm whales, solitary whale sharks, orcas if they are in the area, mega pods of dolphins, and much more. Please note that flights are always subject to weather and mechanical limitations.
DIVERS
Approximately 15 dives plus 1 day swimming with whale sharks and hopefully additional snorkelling with cetaceans. A 5mm wetsuit is recommended at the start of the season in July, while a 3mm wetsuit will likely be fine from August onwards. Our SeeCreatures ocean activities centres are located in Cabo San Lucas and La paz are there to support whatever you need from discounted pre-trip adventures including day trips to Cabo Pulmo and Gorda Banks to photography workshops to wetsuit, gear and go-pro rentals. On our Sea of Cortez adventures there's usually the opportunity for several night dives noting that the half day or day that we spend with the whale sharks is a snorkelling opportunity rather than scuba diving. There is no minimum experience level required for this trip, but all divers need to have buoyancy control and other skills required for open water certification. We will have dive guides in the water on all dives to assist our guests
SWIMMERS
A trip like this is heaven for swimmers. Beautiful warm water, lots to see, and lots of adventure. You'll be traversing deep into the Sea of Cortez, exploring little-visited areas that very few people get to see. There has never been a swimming safari offered like this in Baja. To participate in a swimming safari based on one of our Liveaboards, you do need to be a competent swimmer. But don't worry about fitness. You can swim as much or as little as you like, and you'll get stronger every day. Support skiffs will be nearby. Whether you swim very little or, for hardcore summers, you might swim up to 10 km a day, the choice is yours.
PADDLERS AND PADDLEBOARDERS
Self-reliant paddlers and paddleborders are welcome to head off on their own, subject to safety restrictions. Please let us know your experience and kayak preference well before departure. We have both single and two-person kayaks available. We have very high-end Seaward ocean touring kayaks that are very fast, but a little bit tipsy, and to delegate to be hauled up on rock beaches or alternatively, we have some high-quality plastic touring kayaks that are a bit more stable and much tougher. We can arrange a guide for a minimum group size of six or a custom guide can be requested by prior arrangement.
FOR THOSE INTERESTED IN THE ADVENTURE
Come and join us! There will be opportunities to go ashore, hike in the desert, and we will do our best to arrange a tour to view cave paintings. You'll also have the chance to snorkel with whale sharks, and most likely go ashore on remote Isla San Pedro martir*, home to one of the largest populations of bluefooted and brown boogie birds in the world. Additionally, you can snorkel with sea lions, jump in the water with a pod of dolphins, try your hand at kayaking or paddleboarding in North America, climb the Ridgeline on Isla San Francisco, enjoy beach walks, hike through the desert, and much more. \n * We are fully permitted to go ashore at Isla San Pedro martir which is a special and unique privilege. Please note that a storm in 2023 wiped out part of the path making it much more difficult to traverse the island. Large numbers of sea lions on the beach can also make landing difficult.
SAFETY
Safety, excellence in guest experience, and the happiness of our guests are the cornerstones of our operations. Nothing is more important than your safety. At Nautilus and Baja Expeditions, we are proud to be the only operation in the world with ISM certification and external annual audit of our safety management system. This is the same certification that the largest cruise ships on the oceans hold. We strictly adhere to written processes, procedures, and protocols, and our captain and crew are trained into both initially, and with annual recurrent training. Every activity starts with a briefing on a whiteboard on board. All drivers must be equipped with an SMB and dive alert, which we provide as needed. Any guest participating in water activities must be equipped with a Nautilus Lifeline, emergency radio, and GPS device. We carry AEDs and extensive medical kits with a contract medical officer available to receive our sophisticated satellite communication system.
What do I need to pack?
Personal toiletries. Dive gear (or travel light and use our rental gear). Summer wear, noting that nights will be cooler. It can be very hot in the desert this time of year. Sunscreen (reef-safe sunscreen will be available on board with our compliments), towels, bed linen, soap, and shampoo are provided on board.
Do I need a passport?
Yes, and it must be valid six months from entry date
Do I need to obtain a visa ahead of time?
Only for a very limited number of countries. Please check the requirements for your country.
Do I need insurance?
Guests are required to have medical and evacuation insurance from a recognized provider before participating in any of our activities. Click here. to purchase coverage. We highly recommend this provider because they are very dependable, reliable, and their policies are reasonably priced. Other providers may not offer the same level of reliability. We also highly recommend the optional purchase of trip interruption insurance, which covers everything from cancelled flights, weather-related delays, lost baggage, and reimbursement if another guest has a medical issue that affects your trip. If you decline coverage, please know that we do not issue credit refunds for anything that's beyond our immediate control.
What airport do I fly into?
SJD Los Cabos international has very convenient and nonstop connections to many different cities. Flying into LAP la Paz is also possible.
When should I fly in?
These trips are planned around the guests having the option of flying in and going straight to SeeCreatures to check in and then board the ship later that day. We recommend flying in several days early to take full advantage of our hospitality and all the neat stuff that we offer as pre-trip extensions.
How do I get from SJD into town?
Sealine Cabo transfers is our recommended provider of airport transfers to and from SJD. For booking please email Martin at: mmoreno@sealinecabotransfers.com We also recommend Miguel from Fara Nuevo as an alternative option. Email: mfc949@gmail.com Phone: +52 (624) 141 6254
How do I get from LAP into town?
We can arrange to pick you up. Please directly contact with our Concierges: concierge@nautilusdive.com
Can you recommend a local hotel?
Yes. For sure. We have our favourite hotels that we recommend and we have arranged discounted rates for Nautilus and Baja Expeditions's guests. For hotel recommendations, or any other pre-trips, questions, concerns, or comments, please contact our concierge's directly: Phone: +1 (604) 241-1918 - Please ask for Daniela or Maria WhatsApp: +1 (604) 360-9400 Email: concierge@nautilus.com
What is NOT included in the trip price?
Bar, gift shop, high-speed Internet connection, rentals, nitrox, crew gratuities. A $35 port fee must be paid on board in cash at the end of the trip.
Do you have a storm policy?
We highly recommend trip interruption insurance, which will cover you in this unlikely eventuality.
Where do we meet our boat?
When you arrive in town, please drop by SeeCreatures Cabo San Lucas location at Calle Miguel Hidalgo 10, Centro CSL. C.P. 23450, Cabo San Lucas, BCS. We will help get your kit up with whatever you need and hopefully get you out on pre-trip diver activities. Our SeeCreatures locations are normally open from 8 AM to 5 PM, but will stay open later on boarding days. We encourage you to check in early on boarding day, and drop off your luggage so that you can wander off and enjoy town.
Are you joining us in Cabo?
Please be at SeeCreatrues Cabo and for your transfer to La Paz, 4:30 pm latest.
Are you joining us in La Paz directly?
Please contact our concierge's to confirm the meeting place and time
Can you help me get dive certified before the trip?
Yes. We specialize in introducing as many people to scuba diving as possible. We offer a full array of diving courses at SeeCreatures.
Can I get nitrox certified before we leave on the ship?
Yes, we could do it. This is a one day course at SeeCreatures.
Will I need to show proof of insurance, and if I'm a diver, adive certification card before boarding?
Yes.
Will I get seasick on this trip?
This time of year, the Sea of Cortez is generally quite calm. If anyone is worried about seasickness, we recommend the prophylactic use of the scopolamine patch. This is the perfect trip and destination for anyone looking for a smooth as possible experience at Sea. Please note that all of our steel ships are stabilized.
How much experience do I need if I'm a diver?
Your experience doesn't matter. If you're not certified, we can arrange a discover scuba experience. If you're an experienced and self-reliant diver, you're welcome to head off on days by yourself, and do your own thing if you wish, with the sole exception of diving in a national park where diving must be done with a guide. Our dive guides are always available for whoever wants to dive with us.
Are the boats camera friendly?
Of course! We have lots of housed GoPros available for rent and we offer a complimentary photo workshop at 1 pm. before every departure for those meeting us in Cabo.
What time do we arrive back in port?
Reminder that most Sea of Cortez trips board and return to La Paz with an included transfer to SeeCreatures Cabo San Lucas, or SJD Airport. We are usually back in port by 8 am. Disembarking by 8:30 am after breakfast. It's a 2-1/2 hour transfer to SJD. For that reason we recommend booking your outward flight 2:00 pm or later.
Can you accommodate special dietary requests?
Yes, with reasonable advance notice, we are pleased to accommodate vegetarian, vegan, lactose, intolerant, gluten, free, low sugar, quasi-kosher and quasi-halal. We are likely unable to accommodate other special dietary requests, or guests with severe allergic challenges.
Whale Shark Ultimate in the Sea of Cortez
The entire experience was very pleasing. Everyone was very pleasant and always on hand to help.
Whale Shark Ultimate in the Sea of Cortez
great crew great time very safety conscious and aware of making sure everyone was safe and had a great trip
