Swimming with whale sharks in the Maldives

The whale shark is the largest fish in the sea. Despite the size, it’s a gentle filter feeder that eats plankton and small fish, and it poses no danger to swimmers. Each shark has its own pattern of pale spots, like a fingerprint, which researchers use to identify individuals.

In 2016 the IUCN moved the whale shark to “Endangered” on its Red List, after finding that numbers had more than halved over 75 years. Fishing, ship strikes and entanglement are among the main causes.

In the Maldives, fishing for whale sharks has been banned since 1995 (as reported), and they are a protected species.

For the bigger picture of what lives on Maldivian reefs, from turtles to mantas, see our Maldives marine life guide.

The South Ari Marine Protected Area (SAMPA)

The South Ari Marine Protected Area, usually shortened to SAMPA, was set up in June 2009 to protect a year-round gathering of whale sharks. It is the largest marine protected area in the country, covering about 42 square kilometres. The zone runs as a strip along the outer reef of South Ari (Alif Dhaal) Atoll, from Rangali in the west to Dhigurah in the east, and reaches about one kilometre out from the reef edge.

The sharks spend much of their time in deep water off the reef and come up to the surface, which makes snorkelling encounters possible. It also leaves them exposed to passing boats.

Mostly young males

The Maldives Whale Shark Research Programme (MWSRP), a Maldivian research charity based on Dhigurah, has studied these sharks since 2006. Its database holds more than 600 individually identified whale sharks, and around 91% of them are male. Almost all are juveniles, usually somewhere between about 4 and 8 metres long.

The programme believes South Ari works as a kind of secondary nursery, or staging ground, for young males. Many of the same sharks come back again and again, which gives South Ari one of the highest re-sighting rates of any whale shark site.

Elsewhere in the Maldives

Whale sharks turn up in other atolls too, but outside South Ari a sighting is a lucky bonus, not something you can plan around. Our atolls guide shows where Ari sits on the map.

Whale sharks are present in SAMPA in every month, so there is no single “season” you have to hit. What changes through the year is the sea itself.

• Northeast monsoon (dry season, roughly January to March): calmer, sunnier days are more common, which makes long boat trips more comfortable.
• Southwest monsoon (wet season, mid-May to November): more rain and wind, according to the Maldives Meteorological Service. Some days the sea is too rough for a long crossing, and trips can be postponed.
• April and December: transition months, with changeable weather.

The sharks also stay deep on some days. Our best time to visit guide covers the monsoons in more detail.

Staying in South Ari

The simplest way is to stay on a local island in or near the protected area. Dhigurah, at the eastern end of SAMPA, is a local island with guesthouses, and boats leave from there for whale shark trips. South Ari also has a domestic airport at Maamigili, and speedboats link the atoll with Malé. See getting around the Maldives for how domestic flights, speedboats and ferries fit together.

Staying close means short rides and more than one chance.

A full-day trip from another atoll

From islands in North Malé Atoll, whale shark trips are a long day out. On Dhiffushi, on the eastern rim of North Malé Atoll, island operators run a whale shark and manta ray full-day trip of about eight hours, with a long boat ride each way. It works best for confident swimmers who don’t mind open sea, and it is weather-dependent. If you’re coming for mantas too, see our manta and whale shark season page.

Liveaboards

Liveaboard dive boats move between atolls and often include South Ari on their routes. They suit divers who want several days at sea, and most encounters are still on snorkel.

SAMPA had no working management plan for years. One was released in early 2025 and has been tightened since. As reported in Maldivian national news, the main points are:

• Registered boats only. Vessels must be registered to operate in the zone, fly a designated flag inside it, and share their live location with the authorities.
• A cap on boats. From 31 July 2025, no more than six vessels at a time are allowed in the contact zone.
• Propeller guards. Snorkelling and diving boats, speedboats and other vessels working in the area must fit propeller guards (required from mid-2026, as reported).
• No jet skis. Recreational craft such as jet skis are no longer allowed in the zone.
• Certified guides and crew. Only guides with SAMPA certification may take tourists there, and every boat needs at least one crew member certified in rescue diving.

These rules exist for a reason: the ministry has said around 70% of whale sharks in the area have been injured by boat propellers. Choosing a registered boat with a certified guide is the most useful thing you can do for them.

The Maldives Whale Shark Research Programme has published a simple code of conduct for swimmers. Your guide should brief you on it, but it helps to know it in advance.

• Keep your distance. Stay at least 3 metres from the body and 4 metres from the tail. A swipe of that tail is powerful.
• Never touch. Their skin has a protective mucous layer, and touching can harm it and stress the animal.
• Don’t block the way. Never swim in front of a shark or cut across its path. Stay to the side and slightly behind.
• Enter quietly. Slip in from a seated position, without jumping or splashing, and keep noise down. Boats should drop swimmers about 20 metres from the shark, not on top of it.
• No chasing. If the shark dives or turns away, let it go.
• No flash. Switch off camera flash and video lights.
• Keep groups small. Fewer swimmers means less stress for the shark and a better view for you.

A good guide makes sure everyone is out of the water before the boat moves. For wider tips on low-impact travel, see our responsible travel guide.

• Fitness: you’ll be swimming in open water, often with some current. If you’re new to this, read our snorkelling guide first.
• Seasickness: crossings can be bumpy. Take tablets before you leave.
• Expectations: no honest operator guarantees a sighting. Ask what happens if the sea is too rough or no shark appears.
• Dress code on shore: on local islands, cover shoulders and knees in the village. See our what to wear guide.
• Pair it with mantas: the same trips often look for manta rays too. See manta rays in the Maldives.