Sri Lanka sits at the crossroads of the Indian Ocean, and its waters reflect that position: warm, diverse and full of life. The coastline is dotted with more than 200 documented shipwrecks, coral gardens teeming with reef fish, turtles and sharks and open ocean frequented by whales and dolphins.
But Sri Lanka remains significantly under-visited compared to the Maldives or Thailand, even though it offers diving that is just as rich and often far less crowded.
What you dive and when, depends on the coast. Sri Lanka’s monsoon seasons split the island: the southwest is best from November to April, the east from May to September. This means that somewhere in Sri Lanka offers good diving year-round, if you know where to look.
The west coast: November to April
Colombo
Colombo does not get the attention it deserves as a dive destination. The city’s coastline is littered with shipwrecks, both historic and recent, that have developed into rich reefs.
The Pecheur Breton (also known as the Cargo Wreck) is one of the most rewarding: 90 metres long, lying on its side at 20 to 33 metres, its cargo hold providing an easy and dramatic swim-through. Diving in Colombo is stunning as it has over 20 shipwrecks which can be explored by advanced divers, as they sit at 20-40metres.
Kalpitiya
Kalpitiya sits on the northwest coast and offers a completely different character from the south. The area draws is known for its macro life: nudibranchs, stingrays, morays and octopus.
Kalpitiya is also one of the few spots in Sri Lanka where you can spot orcas, whales and dolphins too. The diving here is suited to divers who enjoy searching for smaller marine life.
Hikkaduwa
Hikkaduwa is where Sri Lankan dive tourism started and it remains the most accessible entry point. The Hikkaduwa Marine National Park sits just offshore with reefs only 20 to 50 metres from the beach. Yay to shorter boat rides!
The coral gardens here host butterflyfish, angelfish, parrotfish, and moray eels. Turtles, mostly green and hawksbill are common. The Rangoon wreck, a steel cargo ship lying at around 15 metres, is approachable for Open Water certified divers and covered in soft coral growth.
Unawatuna
A short drive east of Galle, Unawatuna offers a different character from Hikkaduwa, more rock formations, interesting swim-throughs, and a wreck scene that rewards repeated dives. The SS Rangoon and SS Orestes are accessible from here, both covered in coral growth and teeming with schooling fish, octopus, and nudibranchs.
Visibility in Unawatuna can be variable, but when conditions are good, the dive sites here are genuinely beautiful. Good for all levels; the bay’s sheltered position keeps conditions manageable.
Mirissa and Weligama
Better known for whale watching, the waters around Mirissa also offer solid diving. Rocky pinnacles, vibrant coral gardens, and schools of trevally are the headline attractions. The deeper sites attract larger pelagics and there are occasional whale shark sightings in the right conditions.
The Prince Heinrich Patch (PHP), reached by boat from Weligama, is a mid-level dive with impressive marine diversity, giant morays, stingrays and triggerfish. A solid option if you are based in the south and want variety.
The east coast: May to September
Trincomalee
Trincomalee is the second-largest natural harbour in the world, it was a significant naval base during World War II, and the wrecks from that period are the centrepiece of diving here.
Swami Rock is one of Sri Lanka’s most iconic dive sites. Rock formations carved beneath the ruins of the Koneswaram temple contain underwater masonry, remnants of a 17th-century Hindu temple lost to the sea.
Pigeon Island National Park is the go-to for snorkellers and beginner divers. A protected marine sanctuary in Trincomalee with blacktip reef sharks, turtles and other marine life.
Several little rock formations and coral beds are littered around Trincomalee, some starting at six metres, making it ideal for those newer to diving.
Batticaloa
Batticaloa, on Sri Lanka’s east coast, is known primarily for the HMS Hermes wreck — the most technically demanding dive in the country and for several other wreck and reef dives that remain relatively uncrowded. HMS Hermes in Batticaloa was sunk in 1942 by Japanese aircraft and rests at 53 metres and is one of the few diveable aircraft carriers in the world.
Sri Lanka’s reefs have faced significant pressure. from bleaching events, illegal fishing activities and decades of unmanaged tourism. They are recovering in many areas, but that recovery requires responsible behaviour in the water.
- Do not touch coral.
- Do not stand on reef.
- Do not feed fish.
- Choose a dive operator who actively supports conservation.
Dive certification in Sri Lanka
PADI Open Water courses are available across all major dive destinations. A four-day course typically costs $250 to $400 — significantly less than in Europe or Australia. If you are not yet certified, Sri Lanka is an excellent place to start.
Tapro Treasures is Sri Lanka’s first dive and ocean brand. Our rashguards, tshirts, dive log books and more are made for divers, snorkellers and anyone who loves what’s beneath the surface. Browse the collection at taprotreasures.com.
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