Sharks live in Thai waters, but bites on people are rare: the handful reported in recent years were single, non-fatal bites, blamed on small bull sharks in shallow water. The sharks visitors actually see are harmless to them, mainly blacktip reef sharks in shallow bays and, for a lucky few divers, the plankton-eating whale shark.
To put the risk in proportion, the International Shark Attack File at the Florida Museum of Natural History, which collects shark bite cases worldwide, confirmed 65 unprovoked bites around the world in 2025. Thailand does not appear in its country table for that year. The sea dangers that injure far more swimmers in Thailand are currents, jellyfish and boats.
Our article on dangerous animals in Thailand gives the wider picture of land and sea risks. This page looks only at sharks: which species you may meet, where, what the recorded incidents tell us and how to swim and dive sensibly.
Sharks in Thailand: the essentials
- Most often seen
- Blacktip reef sharks, in shallow bays and over reefs
- Best-known nursery
- Maya Bay, Koh Phi Phi Le (up to 278 adults counted on 2 September 2026)
- Largest
- Whale shark, a filter feeder that eats plankton
- Species linked to recent bites
- Bull shark (Khao Lak 2024, Phuket 2022, Hua Hin 2018)
- Worldwide unprovoked bites, 2025
- 65 confirmed, none listed in Thailand (Florida Museum)
- Emergency
- 1669 ambulance, 1155 Tourist Police
Blacktip reef sharks: the shark you are most likely to see
The blacktip reef shark is named for the black tip on its dorsal fin, which you often see cutting the surface in water only knee-deep. It is a small reef shark that feeds on fish and is normally shy of people. Snorkelers often meet them over shallow reefs, and they tend to swim away.
The best-documented place is Maya Bay on Koh Phi Phi Le, which the Department of National Parks (DNP) describes as an important nursery for the species. During the bay's annual closure, a drone survey on 2 September 2026 counted up to 278 adult blacktips close to the beach, the highest count of the year, with the most sharks seen in the early morning.
You cannot swim with them there. Swimming in Maya Bay is prohibited and visitors may only wade at the water's edge; our guide to visiting Maya Bay explains the boardwalk, the time slots and the annual closure from 1 August to 30 September.
Whale sharks: big, slow and harmless
The whale shark is the largest fish in the sea, and it feeds by filtering plankton and small fish from the water. It has no interest in people. It is listed as Endangered on the IUCN Red List.
Where to see one is harder to answer than most dive websites suggest. Dive operators report sightings at offshore pinnacles in both seas: Chumphon Pinnacle and Sail Rock in the Gulf, near Koh Tao and Koh Phangan, and Richelieu Rock and the Similan Islands on the Andaman side. No Thai authority publishes sightings data, so any "whale shark season" is dive-shop experience, not a schedule. Book a trip for the diving itself and treat a whale shark as a bonus.
The Similan and Surin parks are open only from 15 October to 15 May; our guide to the Similan Islands covers day trips and liveaboards. If you are new to diving, our page on learning to dive on Koh Tao explains courses and how to choose a school.
A whale shark at Chumphon Pinnacle is luck, not a booking. Dive shops can tell you about recent sightings, but none can promise one. Pick a trip for the reef, and you will not be disappointed if the big fish stays away.
The bites that have been reported
The cases reported in Thai and English-language media in recent years follow the same pattern: one bite, in shallow water, on the leg, and the victim survived.
| Date | Place | What happened |
|---|---|---|
| Friday 29 November 2024 | Nang Thong Beach, Khao Lak (Phang Nga) | German woman bitten below the knee in about 1.5 m of water; bull shark identified from the tooth marks |
| Monday 2 May 2022 | Kamala Beach, Phuket | Swimmer bitten; also attributed to a bull shark |
| April 2018 | Sai Noi Beach, Hua Hin | Norwegian man bitten by a young bull shark about 1 m long; beach closed for at least 20 days |
After the Khao Lak bite, the Phuket Marine Fisheries Research and Development Centre identified the species, hotels in the area were asked to tell guests not to swim, and red flags went up on the beach. The Hua Hin details come from Bangkok Post reports at the time, of which we could read only short summaries.
Marine scientist Dr Thon Thamrongnawasawat of Kasetsart University explained the Khao Lak case this way: the shark probably mistook moving legs in shallow water for prey, and the fact that it bit once and left suggests it realized the woman was not food. We found no official record of a fatal shark attack in Thailand. Press reports claim there has been none for decades, but no official statistic confirms it.
Why bull sharks, and why shallow water
Bull sharks are stocky, can live in brackish and even fresh water, and hunt in murky shallows near river mouths, exactly where people wade and swim. Poor visibility is part of the problem: a shark that cannot see clearly may test a moving leg before it recognizes what it is.
That gives you the practical lesson. The risk, small as it is, is highest in cloudy coastal water, not on a clear reef where you can see 20 meters.
How to swim sensibly
The International Shark Attack File gives simple advice that suits Thai beaches well:
- swim with someone else, and stay fairly close to shore;
- avoid swimming at dawn and dusk;
- stay away from schools of fish and from people fishing;
- leave shiny jewelry on the beach and avoid excessive splashing.
If a shark comes close, the same source suggests keeping your eyes on it and moving away slowly, leaving the water if you can. Add two Thai points of our own: obey red flags and beach closures, which officials use after an incident, and think twice about swimming in brown water after heavy rain. Our guide to beach flags and rip currents explains what the flags mean, and in the rainy season box jellyfish are a far greater danger than sharks.
Snorkeling and diving around sharks
For divers and snorkelers, nearly all risk comes from behavior. The Florida Museum classes bites on people who touch, feed or harass sharks as "provoked", and those are the ones you can avoid entirely. Do not chase a shark for a photo, do not feed fish to attract them, and listen to the guide's briefing. In marine national parks, rangers also ask visitors to keep at least 2 meters from coral, which also keeps you at a respectful distance from anything living on it.
If you do get hurt in the water, the ambulance number is 1669; see our page on emergency numbers in Thailand. Check that your travel insurance covers diving to the depth you plan to dive.
Sharks have more to fear from people
After the Khao Lak bite, Dr Thon warned against hunting sharks in revenge and pointed out that many sharks in Thai waters are killed for their fins. Shark fin soup is still sold in Bangkok; our guide to Chinatown explains why we skip it. If you would like to see sharks up close without getting wet, the aquarium covered in our rainy-day guide to Bangkok has a shark and ray tunnel.
Frequently asked questions
Are there sharks in Thailand?
Yes. Blacktip reef sharks are common over shallow reefs and in bays such as Maya Bay, whale sharks are seen occasionally by divers, and bull sharks live in coastal waters. Bites on people are rare, and recent reported cases were single, non-fatal bites.
Has anyone been killed by a shark in Thailand?
We found no official record of a fatal shark attack in Thailand. Recent incidents in Khao Lak (2024), Phuket (2022) and Hua Hin (2018) were all single, non-fatal bites attributed to bull sharks. Press reports say there has been no fatal attack for decades, but no official statistic confirms it.
Is it safe to swim with blacktip reef sharks?
Blacktip reef sharks are small and usually shy, and they normally swim away from snorkelers. Do not touch, chase or feed them. At Maya Bay, where most of them gather, swimming is not allowed at all; you may only wade at the edge.
Where can you see whale sharks in Thailand?
Dive operators report sightings at offshore sites such as Chumphon Pinnacle and Sail Rock in the Gulf and Richelieu Rock and the Similan Islands in the Andaman Sea. No official sightings data exists, so treat any season as a hope rather than a promise.
Sources
- Thai PBS World – Bull shark thought to have bitten German woman (30 November 2024) (checked October 2026)
- Department of National Parks – Blacktip reef sharks at Maya Bay during the 2026 closure (Thai) (checked October 2026)
- Florida Museum, International Shark Attack File – Yearly worldwide shark attack summary (2025) (checked October 2026)
- Florida Museum, International Shark Attack File – Quick tips to reduce risk (checked October 2026)