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An encounter with the largest fish in the world is something many travellers dream of. Diving with whale sharks is a special experience, but good preparation is crucial for success. The right location, the best time of year and choosing a responsible tour operator make the difference between a fleeting glimpse and a respectful, unforgettable experience. Read on and discover how to plan your trip in the best possible way.
What is a whale shark and is it dangerous?
The whale shark (Rhincodon typus) is, despite its name, not a whale but the largest fish species in the ocean. Adults can reach a length of more than 12 metres. Their appearance is distinctive: a broad, flat head, dark grey to blue skin covered with light spots and stripes, and a white belly. This pattern is unique to each individual, comparable to a human fingerprint.
Whale sharks are completely harmless to humans. They are filter feeders, which means they feed by sucking in large quantities of water and filtering out plankton, small fish and krill with their gill arches. They have no teeth for biting or tearing. Their calm and slow swimming behaviour makes it possible to observe them up close underwater. The only thing you need to bear in mind as a swimmer or diver is their powerful tail. An unexpected movement can cause quite a blow, so keeping a sensible distance is always wise.
‘ If animal welfare is your priority, it is advisable to avoid this location. ’
Where and when is the best time to see whale sharks?
Whale sharks live in tropical and warm temperate seas and migrate over great distances. Your chances of seeing them depend heavily on the location and the season, as they follow plankton blooms. Careful planning greatly increases the likelihood of an encounter. Below is an overview of the best-known destinations.
Mexico: reliable sightings in the Caribbean Sea
The waters around Isla Holbox and Isla Mujeres, off the coast of the Yucatán Peninsula, are known as one of the best places in the world to see whale sharks. The animals gather here in large groups.
- Best season: June to mid-September. During this period, the chances of sightings are very high.
- Type of activity: In this area diving with the animals is not permitted; you can only snorkel. The advantage is that this makes the experience accessible to almost everyone.
- Points to note: Tours are strictly regulated to protect the animals. Choose a certified operator who complies with the rules.
The Philippines: the contrast between Oslob and the reefs
The Philippines offers several locations, but conditions vary greatly. Oslob on the island of Cebu is perhaps the best-known spot, but also the most controversial. Here the whale sharks are fed to keep them in the same place all year round. This disrupts their natural migration patterns and behaviour.
For a more natural experience, it is better to head to other locations, such as the Tubbataha Reefs Natural Park or the waters around Mindoro. These places often require a liveaboard (a boat on which you stay for several days) and are more suitable for experienced divers.
- Best season: All year round in Oslob (because of the feeding), seasonal at other locations such as Tubbataha (March to June).
- Type of activity: Both snorkelling and diving are possible, depending on the location.
- Points to note: Be aware of the ethical concerns in Oslob. If animal welfare is your priority, it is advisable to avoid this location.
Australia and Thailand: seasonal opportunities
You can also encounter these giants in other parts of the world. Ningaloo Reef in Western Australia is an excellent destination where interactions with whale sharks are strictly controlled to ensure sustainable tourism. In Thailand, divers regularly spot whale sharks around Koh Tao, especially at deeper dive sites. However, sightings here are less predictable and not guaranteed.
- Best season: Ningaloo Reef (March to July), Koh Tao (varies, with peaks around March–May and September–October).
- Type of activity: Diving and snorkelling.
Rules for a safe and respectful experience
Because the whale shark is an endangered species, it is vital that interactions take place in a responsible way. Certified tour operators apply strict rules that have been drawn up to protect both the animals and the tourists. These are the main guidelines:
- Keep your distance: Stay at least three metres away from the sides and four metres from the tail.
- Do not touch the animals: Touching a whale shark can damage the protective mucous layer on its skin.
- Swim calmly and alongside the shark: Do not swim directly in front of or above the animal. This can block its path.
- Do not use flash photography: Bright light can disorient and stress the animals.
- Limit the number of swimmers: Responsible tours allow only a small number of people in the water at the same time.
By following these rules, you help protect whale sharks and ensure that future generations can also enjoy these magnificent animals.
Practical preparation for your trip
Good preparation starts with choosing a reliable tour operator. Look for companies with eco-certification that actively promote animal welfare rules. Read online reviews and pay particular attention to comments about how they treat the whale sharks and the size of the groups.
Most tours last half a day and include snorkelling or diving equipment. Check this in advance, especially if you need specific sizes. In some cases, a life jacket is compulsory, which helps you to stay afloat and prevents you from accidentally diving underneath the shark. Bring your own sunscreen, a cap and, if needed, a long-sleeved shirt (rashguard) for protection from the sun and possible jellyfish.
Careful planning is the basis of a successful trip. On the Traveler Tips website you will find plenty more in-depth information about preparing your holiday, from sustainable travel routes to practical checklists for your gear. Explore our guides and turn your next trip into a well-organised and mindful experience.
Frequently asked questions
The best places to dive with whale sharks are Mexico (Isla Holbox/Isla Mujeres from June to mid-September), the Philippines (Tubbataha and Mindoro Reef for divers on a liveaboard) and Australia (Ningaloo Reef). To integrate this into an itinerary, you can book the tour via local operators, taking into account the best seasons and avoiding busy locations such as Oslob in the Philippines. Choose certified operators that prioritise animal welfare and strictly follow the rules, such as keeping your distance and not touching the animals. A tour typically lasts 3–6 hours and costs between €50 and €150.
The ideal time of year to encounter whale sharks in Mexico (Isla Holbox/Isla Mujeres) is from June to mid-September. Essential preparations include choosing certified operators that prioritise animal welfare, respecting a minimum distance from the whale sharks and never touching them. Make sure you are equipped with a snorkel and life jacket, and be prepared for the weather conditions and possible seasickness. Always follow the group rules and the guide’s instructions for a safe and mindful experience.
Choose a certified provider that prioritises animal welfare and follows WWF guidelines to protect whale sharks. When booking, pay attention to reviews about respect for animals, avoid places with overtourism such as Oslob where sharks are fed, and make sure the tour enforces strict distance rules and limits on group size. Ask whether equipment is included and whether the tour is suitable for any accompanying children.
Swimming with whale sharks costs between €50 and €150 for a tour of 3–6 hours, including a briefing and several sightings. To budget for this smartly, travel outside peak periods and combine it with other local sights. Also check the weather forecast and opt for certified operators that prioritise animal welfare. Book via TripAdvisor or local operators and pay particular attention to reviews, especially those about respect for animals.
To comfortably and fully enjoy swimming with whale sharks, no specific skills are required as long as you can swim well. A life jacket, snorkel and fins are often included on tours. Your own rashguard can be useful against the sun and jellyfish. Children from about 6–8 years old can join if they are strong swimmers.