Diving in Bali: a complete guide by an SSI instructor
- Jul 2
- 6 min read
There are destinations you dive. And there are destinations you live. Bali belongs to the second category.
It's not just the warm water, the coral gardens or the big pelagics that appear without warning in Nusa Penida. It's the combination. It's descending to 30 meters to come face to face with a Mola Mola and, two hours later, sharing a meal with a local family while the sun drops behind a temple. Bali dives differently because Bali feels differently.
I've dived this island across multiple seasons. I've led groups, done technical dives in its wrecks, waited for the ocean sunfish at Crystal Bay and discovered that some of the best moments were never planned.
This guide is what I wish I'd found the first time I travelled there: complete, honest and useful. No marketing, no hype.
If you're thinking about diving Bali, here's what you need to know.
Why dive Bali?
Bali is one of the most complete diving destinations in the Coral Triangle — the region with the highest marine biodiversity on the planet.
On a single island you can go from a coral-covered wreck in calm waters to a powerful open-water current, spotting big pelagics in the morning and macro life in the afternoon.
What makes Bali special isn't one particular site — it's the diversity. In the north you have Menjangan, with vertical walls and pristine marine life. In the east, Tulamben and Amed with their historic wreck and coral gardens.
To the southeast, Nusa Penida and its Mola Mola and manta ray encounters. And in between, dozens of sites that rarely appear in commercial guides but deliver genuinely memorable dives.
Add to this a well-developed dive infrastructure, prices that are accessible by European standards, and the ability to combine the trip with culture, surfing, mountains or gastronomy — without the logistics becoming a nightmare.
When to dive Bali (best season by site)
Bali has good diving year-round, but not every site is at its best at the same time. Here's the practical breakdown:
Dry season (April to October) — The best overall period. Calmer seas, better visibility and, most importantly for many divers: this is Mola Mola season in Nusa Penida (July to October, peaking in August and September). If seeing the ocean sunfish is your priority, plan your trip within this window.
Wet season (November to March) — More rain, but diving remains excellent at sheltered sites like Tulamben, Amed and Menjangan. Visibility can drop after heavy rainfall, but the water stays warm and prices go down. A good option if you want to avoid the crowds.
Manta rays in Nusa Penida — Visible year-round at Manta Point, though optimal conditions are typically between April and November.
The best dive sites in Bali
Tulamben — The USAT Liberty and the coral
The USAT Liberty is arguably the most accessible and best-preserved wreck in Southeast Asia. An American merchant vessel from World War II, torpedoed by a Japanese submarine in 1942, it rests between 5 and 30 meters deep, running parallel to the coastline.
What makes it exceptional is shore access. No boat needed. You walk in with your gear (watch your step on the rocks), slip on your fins and you're in within five minutes.
The wreck is covered in soft coral, sea fans and macro life.
At dawn, large schools of bumphead parrotfish often appear. At night it's one of the island's best muck dives.
Level: suitable for Open Water if the dive is well planned (the deepest sections reach 30m, but most of the wreck is explored between 10 and 18m).
Amed — The perfect starting point
Amed is just 30 minutes south of Tulamben and one of my favourite spots to introduce divers to Bali — especially those who have just got their certification.
Conditions are forgiving, marine life is abundant and the sites vary: Jemeluk, Bunutan, Lipah Bay…
It's prime macro territory: gobies, nudibranchs, ghost pipefish, scorpionfish. If you're into underwater photography, bring your macro eye.
Level: ideal for Open Water and Advanced divers.
Nusa Penida — Mola Mola and manta rays
Nusa Penida isn't technically Bali — it's an island a 45-minute boat ride to the south — but every serious dive operation covers it from the main island. And it's, without question, the site most divers come looking for.
Manta Point is a cleaning station where manta rays are visible year-round at shallow depth. It's one of the few places in the world where a manta encounter is practically guaranteed.
Crystal Bay is where you go for the Mola Mola. Cold water (it can drop to 18°C in August-September — bring a 5mm wetsuit and hood), strong currents and pronounced thermoclines.
The ocean sunfish rises from the depths to clean itself at coral stations between 18 and 30 meters.
Important: currents in Penida can be strong and unpredictable. This is NOT a site for newly certified Open Water divers. Advanced certification at minimum, ideally with experience in currents and solid buoyancy control.
Menjangan — Walls and untouched life
Menjangan is Bali's best-kept secret in the northwest.
A small island inside the Bali Barat National Park, with vertical walls dropping past 40 meters, giant sea fans and a stillness rarely found elsewhere on the island.
Currents are gentle, visibility is excellent (often exceeding 25 meters) and sites are sheltered from swell. The perfect place for effortless wall diving in a pristine environment.
Level: Open Water with prior experience.
Padang Bai — Coral garden and the challenge of Blue Lagoon
Padang Bai serves as the base for dives at Blue Lagoon, Jepun and Tanjung Sari. Abundant life, healthy coral formations and, occasionally, encounters with whitetip reef sharks.
Blue Lagoon can carry significant current depending on the tide — don't let the friendly name fool you.
The marine life you'll encounter
Bali offers a catalogue of marine fauna that few islands can match:
Mola Mola (ocean sunfish): Crystal Bay, July-October
Manta rays: Manta Point, year-round
Reef sharks: whitetip and blacktip at various sites; thresher and nurse sharks occasionally
Green and hawksbill turtles: common across nearly all sites
Bumphead parrotfish: dawn at USAT Liberty
Macro life: ghost pipefish, frogfish, dozens of nudibranch species, octopus, cuttlefish, pygmy seahorses on specific sea fans at Menjangan
Schools of jacks, barracuda and tuna in current zones
Level required: is Bali for beginners?
Yes and no. It depends on the site.
For beginners (newly certified Open Water): Tulamben (with a proper briefing), Amed, parts of Menjangan and the calmer sections of Padang Bai.
For Advanced or equivalent: Nusa Penida (Manta Point may be manageable for Advanced; Crystal Bay requires experience with currents and cold water), deeper sections of the Liberty, deep walls at Menjangan.
For technical diving: technical penetration of the USAT Liberty, sidemount and trimix available with specialist operators.
My honest recommendation: if you have a recent Open Water certification and few dives logged, spend the first 4-5 days at Tulamben, Amed and Menjangan before considering Nusa Penida. You'll arrive at Penida with solid buoyancy and the experience will be significantly better — and safer.
What to pack (and what to leave behind)
Always bring:
Your own dive computer (don't rely on rentals)
Your own mask (the most personal piece of gear after your computer)
Reef-safe sunscreen (mandatory in many protected sites)
Lycra or long-sleeve rash guard (even for snorkelling)
Primary and backup torch if you're planning night dives or wreck penetration
Reusable water bottle and filter (Bali has a serious plastic problem)
Consider depending on your plans:
5mm wetsuit if you're diving Crystal Bay in August-September
Hood (thermoclines in Nusa Penida are genuinely cold)
Camera with underwater housing and lights if you're into underwater photography
Leave at home:
Full equipment if you're travelling light — rental gear in Bali is good quality and affordable
Jewellery and valuables — homestays don't always have a safe
The most common mistakes divers make in Bali
After several seasons watching groups dive the island, these are the mistakes I see repeated most often:
1. Underestimating Nusa Penida's currents. The Mola Mola moment looks great on Instagram, but if your buoyancy isn't solid, that site isn't ready for you yet. Accept that you need more dives first.
2. Trying to do every site in a few days. Bali doesn't get dived in 5 days. If your time is limited, pick one area (Tulamben+Amed, or Menjangan, or Penida) and go deep into it rather than skimming everything.
3. Not booking Mola Mola dives in advance during peak season. August-September fills up. If you want to guarantee your Crystal Bay day with a small group, book weeks ahead.
4. Never leaving the water. Bali offers rice terraces, temples, volcanoes and some of the most interesting cuisine in Asia. The diver who only sees the boat and the resort misses half the trip.
5. Choosing the cheapest operator. In diving, the price-to-safety ratio matters. Check certifications, instructor-to-diver ratios and equipment maintenance standards. Cheap can be genuinely expensive.
Living Bali with Born to the Ocean
From 21 to 30 September 2026, we're heading back to Bali with a small-group expedition (maximum 8-10 divers).
Ten days covering the island's best sites, with careful attention to buoyancy, reduced instructor ratios and the signature mix of diving, underwater photography and local culture that defines every BTO trip.
We're not a travel agency. We're divers and photographers designing expeditions we'd want to do ourselves.
Every dive is considered, every evening has a purpose, and every group leaves feeling they've truly dived Bali — not just passed through it.
If you like what you've read and want to dive Bali with us, let's talk.
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