Diving and Snorkelling in Bali

Bali’s reputation runs on volcanoes and rice terraces, but the water surrounding it holds some of the most varied diving and snorkelling in Southeast Asia: a WWII wreck close enough to touch from a black sand beach, manta rays that never leave, a sunfish the size of a car door, and a coral reef being regrown with electricity. None of it requires a liveaboard or a remote island crossing. Every site in this guide is reachable on a day trip from somewhere you can also sleep in an air-conditioned room.

The two audiences get uneven treatment almost everywhere else written about this. Snorkellers are usually an afterthought bolted onto a diving article, even though several of Bali’s best sites need nothing but a mask and the willingness to walk into the water. This guide treats both as first-class: what needs a tank and a certification card, and what genuinely doesn’t.

How Bali’s Dive and Snorkel Regions Compare

Four regions cover almost everything worth doing in the water. Where you base yourself for a Bali trip (see the Bali travel guide for area comparisons) determines which of these is a day trip and which needs a dedicated night or two.

Tulamben: The USAT Liberty Wreck

Tulamben exists on the dive map because of one ship. The USAT Liberty, a 120-metre US Army cargo transport, was torpedoed by a Japanese submarine in the Lombok Strait in January 1942. It’s commonly mislabelled the “USS Liberty” online, but USAT (United States Army Transport) is the correct designation; the USS prefix belongs only to commissioned US Navy vessels. Under tow toward Singaraja, the ship was taking on too much water to make it and was beached at Tulamben instead, where it sat on dry sand for over two decades. When Mount Agung erupted in 1963, the lava flow pushed the wreck off the beach and into the sea, where it settled onto its side in the exact spot divers visit today.

The wreck now sits parallel to the shore, starting at around 5 metres at its shallowest point and reaching roughly 30 metres at the stern. That range is what makes it work for almost everyone: snorkellers explore the upper structure without a tank, Open Water divers get a full wreck dive without exceeding recreational depth limits, and the deeper sections still reward divers who have done it a dozen times. Entry is a short shore walk over rocks (reef shoes help), and the whole site is close enough that no boat is needed.

• The Drop-Off. A wall dive a short swim north of the Liberty, dropping from around 3 metres to well past recreational limits. Soft corals and reliable schooling fish along the wall face.
• Coral Garden. A shallower, gentler site just north of the wreck, better suited to newer divers or as a second dive after the Liberty.

A guided dive with full equipment runs around IDR 400,000–600,000 (~USD 25–37), typically cheaper for a two- or three-dive package with the same operator.

Amed: Shore Diving and Muck Diving

Amed is Tulamben’s quieter neighbour, thirty minutes down the coast road, and it covers a different niche: shore access good enough to skip a boat entirely, and one of Bali’s best muck diving sites for anyone chasing small, strange creatures rather than big animals.

• Japanese shipwreck, Jemeluk Bay. A small Japanese patrol boat resting in 3 to 5 metres of water, close enough to reach by snorkelling straight off the beach. No dive certification, no boat, no entry fee.
• Turtle Point and Lipa Bay. Two shore-access sites east of the main bay with regular green turtle sightings on the reef slope, quieter than Jemeluk Bay itself.
• Seraya Secrets. Amed’s dedicated muck diving site: a stretch of dark volcanic sand rather than a reef, but consistently productive for macro life, mandarin fish at dusk, ghost pipefish, frogfish, and the occasional bobbit worm. Not a scenic dive; a rewarding one if small, unusual animals are the goal.

Amed also has more dive resorts offering multi-night packages than Tulamben, and accommodation runs cheaper along this stretch of coast. Worth two nights rather than a rushed day trip if diving is a priority for the visit.

Nusa Penida and Nusa Lembongan: Mantas, Mola Mola, and Currents

Nusa Penida is Bali’s most talked-about dive destination, and the currents that make its marine life so reliable are the same currents that make several of its sites unsuitable for a first open-water experience.

• Manta Point and Manta Bay. Manta rays are year-round residents at cleaning stations off the southwest coast, not seasonal visitors. Manta Point has stronger current and mantas that linger; Manta Bay is calmer and better suited to snorkellers and less confident divers. Full detail on both, including which suits which experience level, is in the Nusa Penida activities guide.
• Crystal Bay. The site for mola mola (ocean sunfish), a fish that can weigh over a tonne and looks like it’s missing its back half. Sightings peak from roughly August to October, when cold upwellings bring the fish up from depth to be cleaned by reef fish. This is fundamentally a diving experience: mola mola sit too deep for snorkellers to see reliably.
• Blue Corner and Toyapakeh. Two current-graded drift sites for certified divers with real current experience. Blue Corner is known for its unpredictable, occasionally strong current and passing pelagics; Toyapakeh is calmer and better for reef fish diversity and soft coral.

Nusa Lembongan, Penida’s smaller and calmer sister island, is the practical answer for anyone who wants the same general area without Penida’s stronger currents. It’s a shorter, gentler crossing from Sanur and a reasonable base for beginner divers or snorkellers who want a slower introduction before attempting Penida’s harder sites.

Menjangan and Pemuteran: Wall Diving and the Biorock Reef

Bali’s northwest corner gets a fraction of the visitors the east coast and Nusa Penida see, mostly because it’s a three to four hour drive from the south. What’s there rewards the trip.

• Menjangan Island. Part of West Bali National Park, reached by a short boat ride from Pemuteran. Considered Bali’s best wall diving: a steep drop-off lined with soft corals and sea fans, with visibility that regularly exceeds 20 metres, the clearest water in Bali. A day trip including boat, guide, and park entry runs around IDR 400,000–700,000 (~USD 25–44).
• Secret Bay. A muck diving site near Gilimanuk, on the opposite side of the strait from Menjangan. Cold, nutrient-rich water and a sandy, low-visibility bottom that consistently produces rare macro finds: seahorses, frogfish, mimic octopus, and juvenile fish species divers travel specifically to photograph.
• Eel Garden. A sloping sand site off Menjangan’s coast where garter eels colonise the seabed by the hundreds, retreating into the sand as divers approach and re-emerging once the group has passed.

Pemuteran itself, the small coastal village that serves as the base for Menjangan trips, is home to something no other dive region in Bali has: the Biorock project, one of the largest coral reef restoration efforts in the world. Launched in 2000, it now runs more than 100 submerged steel structures along the Pemuteran coastline, each carrying a low-voltage electrical current that triggers mineral accretion on the metal. Coral fragments attached to the structures grow two to six times faster than on untreated reef, and survive heat stress and bleaching events better. The structures sit in shallow water close to shore, making the reef snorkellable as well as divable, a genuine rarity: a restoration project you can visit rather than just read about.

Snorkelling Without a Tank: What’s Actually Accessible

A real snorkelling trip to Bali doesn’t need a single one of the dive sites above to require a tank. Several of the best marine encounters on the island are shore-accessible or a short, calm boat ride away.

• Nusa Dua. The one entry on this list that needs no boat trip at all for anyone based in south Bali. The reef offshore breaks the swell, leaving calm, shallow water over coral close enough to reach by wading in from several of the beach’s resort stretches. Not Bali’s most dramatic reef, but the most convenient one by a wide margin.
• Blue Lagoon, Padangbai. A sheltered cove a 10-minute walk from the Padangbai ferry pier, calm enough for confident beginners, with reef fish, cuttlefish, and the occasional moray eel visible close to the surface. Full access details are in the Bali beach guide.
• Jemeluk Bay, Amed. The Japanese wreck above doubles as one of Bali’s easiest snorkels: shallow, calm, and reachable by walking straight off the sand.
• Manta Bay, Nusa Penida. The calmer of the two Manta sites, and the one where snorkellers regularly see mantas feeding near the surface without diving.
• Nusa Lembongan. Calmer water than Nusa Penida across most of its coastline, making it the more forgiving choice for anyone snorkelling with children or without much open-water experience.

Getting Certified: Courses and What They Cost

Bali is a genuinely good place to learn to dive: warm, calm-enough conditions at several sites, and a dense concentration of dive schools competing on price and quality.

• Discover Scuba Diving. A half or full day trial for complete beginners, no certification required and none earned. Typically one or two shallow dives with an instructor at a 1:2 ratio or closer. From around IDR 1,500,000–3,000,000 (~USD 95–190) depending on the operator and number of dives.
• Open Water Diver. The entry-level certification, valid worldwide, typically taking three to four days including confined-water skills, open-water dives, and theory. Cost varies widely by what’s bundled in: from around IDR 4,500,000 (~USD 285) for a bare-bones course up to IDR 8,000,000 or more (~USD 500+) including multiple nights of accommodation. Completing the e-learning theory before arriving in Bali shortens the in-water days.
• Advanced Open Water. A follow-on course for certified divers, usually two days covering five specialty dives (deep, navigation, and three electives such as wreck or drift). Useful before attempting Nusa Penida’s stronger current sites. From around IDR 3,500,000–5,000,000 (~USD 220–315).

PADI and SSI are both widely taught in Bali and are internationally interchangeable; the choice usually comes down to which agency a specific dive shop is affiliated with rather than any meaningful difference in the training itself.

Choosing an Operator and What a Day Costs

Dive shops cluster around each region covered above, and most offer near-identical fun-dive pricing once you’re already certified.

• Single fun dive with full gear. From around IDR 400,000–600,000 (~USD 25–37) at Tulamben or Amed, similar at Menjangan once the boat and park fee are included.
• Two- or three-dive day trip. The standard way to visit Nusa Penida or Menjangan, since both require a boat crossing. From around IDR 1,200,000–1,800,000 (~USD 75–115) including transport, guide, and equipment.
• What to check before booking. Confirm the price includes full equipment (not just tank and weights), a maximum group size per guide, and whether hotel transfer is included, since a day trip from south Bali to Nusa Penida or Menjangan can otherwise add hours of unplanned logistics.

Equipment rental for snorkellers, mask, fins, and sometimes a rash guard, typically runs from around IDR 50,000–100,000 (~USD 3–6) per day at beach kiosks near any of the sites above, cheaper than at a resort front desk.

Best Time to Dive and Snorkel in Bali

The dry season, roughly April through October, brings the calmest seas and best visibility across almost every site in this guide. It’s also when mola mola show up at Crystal Bay, peaking around August and September, and when Nusa Penida’s crossing from Sanur is least likely to be cancelled for rough water. Manta rays are visible year-round at both Penida sites regardless of season, since they’re resident rather than migratory.

The wet season, November through March, brings more rain and choppier crossings to Nusa Penida specifically, though shore diving at Tulamben and Amed stays viable through most of it since neither depends on a boat crossing. July and August carry the added complication of Bali’s general high season, meaning dive boats and courses book out further ahead even though conditions are good.

Diving Safety and Practical Tips

• Dive insurance. Confirm your travel insurance covers scuba diving specifically; many general policies exclude it or cap coverage depth. Diver-specific insurance (DAN and similar providers) is worth arranging before arrival if diving is a major part of the trip.
• The no-fly window. Standard recreational guidance is to wait at least 18 hours after a single no-decompression dive before flying, longer after multiple dives over several days. Worth building into the schedule if diving is planned close to a departure flight out of Bali.
• Currents at Nusa Penida. Ask the operator directly about current conditions before booking Blue Corner or the stronger side of Manta Point; conditions change day to day and a reputable shop will be honest about whether a site suits your certification level that day.
• Reef contact. Coral is easily damaged by a careless fin kick or a hand used to steady yourself. Buoyancy control matters more in Bali’s denser reef areas than it does in more open water elsewhere.

Day Trips vs Basing Yourself on the Northeast Coast

Most visitors staying in south Bali treat diving as a day trip: a 5am pickup, two to three hours each way to Tulamben, Amed, or the Sanur harbour for a Nusa Penida boat, and a full day of diving sandwiched between. It works, but it’s a long day, and the early pickup cuts into whatever else is planned for that stretch of the trip.

Basing yourself in Tulamben or Amed for two or three nights removes the transfer entirely and turns a rushed single day into an unhurried multi-dive stay, with the added benefit of significantly cheaper accommodation than south Bali’s resort belt. Worth genuinely considering for anyone who has diving or serious snorkelling as a primary reason for visiting Bali, rather than one activity among many.

For area-by-area accommodation comparisons across the whole island, see the Bali travel tips collection.