Whale sharks, the largest and one of the gentlest fish in the sea, visit Seychelles seasonally, most reliably around the second half of the year when the plankton they feed on is abundant. They are harmless filter feeders, and swimming alongside one is an unforgettable encounter. The waters around Mahe in particular have a history of sightings, with specialist trips heading out in season. Exact timing varies, and no encounter is guaranteed, so ask local operators about recent sightings. Always keep a respectful distance, never touch or chase them, and choose a responsible operator.
Among all the wildlife encounters Seychelles offers, few rival swimming alongside a whale shark, the largest fish in the sea and one of the most gentle. These enormous, spotted, slow-moving giants visit the waters around the islands at certain times of year, and sharing the water with one is the kind of experience people remember for a lifetime. Here is what to know about seeing them.
What whale sharks are like
Despite the name and the size, whale sharks are no threat at all. They are filter feeders that cruise slowly through the water sieving tiny plankton, completely indifferent to the snorkelers lucky enough to swim beside them. They can grow to extraordinary lengths, and swimming alongside something so vast and so peaceful is a humbling, unforgettable encounter rather than a frightening one.
When is whale shark season?
Whale sharks are seasonal visitors to Seychelles, and they are most reliably seen in the transition and southeast-trade periods, broadly around the second half of the year, when the plankton they feed on is most abundant in the islands’ waters. Exact timing varies year to year with conditions, so the best approach is to ask local operators about recent sightings when you plan. Because they are wild animals following the food, no encounter is ever guaranteed, which is part of what makes a sighting so special.
Where they gather
The waters around Mahe in particular have a history of whale shark encounters, and specialist trips head out from the island in season to look for them, often working with spotter support to find the animals. Other parts of the islands’ waters see them too, following the plankton.
Swimming with them responsibly
These are protected, vulnerable animals, and the privilege of swimming with them comes with responsibilities that good operators take seriously.
- Keep a respectful distance and never touch or chase the animal.
- Do not block its path or get in the way of its feeding.
- No flash photography, which can disturb them.
- Follow the guide’s instructions and the local code of conduct at all times.
- Choose a responsible operator who prioritises the animals’ welfare over a guaranteed close encounter.
What a trip is like
A whale shark trip is usually a boat excursion that heads out to search the waters, with snorkelers ready to slip in quietly when an animal is found. There is an element of patience and luck involved, as the boat looks for the tell-tale signs, but that only makes the moment of finding one more thrilling. Even when the giants prove elusive, a day on the Seychelles water is hardly a day wasted.
Plan your trip
If swimming with whale sharks is on your list, plan your trip around the season, ask local operators about recent sightings, and base yourself on Mahe for the best access. See more things to do for the wider range of water trips, and browse our directory for a place to stay near the departure points.
Frequently asked questions
When can you see whale sharks in Seychelles?
Whale sharks are seasonal visitors, most reliably seen around the second half of the year when the plankton they feed on is most abundant. Exact timing varies year to year, so ask local operators about recent sightings when you plan.
Are whale sharks dangerous to swim with?
No, not at all. Despite their enormous size, whale sharks are gentle filter feeders that cruise slowly sieving plankton, completely indifferent to snorkelers. Swimming beside one is a humbling, peaceful encounter rather than a frightening one.
Where do you see whale sharks in Seychelles?
The waters around Mahe in particular have a history of whale shark encounters, with specialist trips heading out in season to find them. Other parts of the islands' waters see them too, as the animals follow the plankton.
How do you swim with whale sharks responsibly?
Keep a respectful distance, never touch or chase the animal, do not block its path, avoid flash photography, and follow the guide and local code of conduct. Choose a responsible operator who puts the animals' welfare first.
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