Koh Tao has dozens of dive centres — from the small family club to the operation that puts several hundred divers in the water every day. Finding the best dive centre in Koh Tao for you is not a question of Google rating or headline price. It is a question of criteria. Here are the 7 questions to ask — and the answers we give at The Divers Boat.
Max divers/guide
Koh Tao boats
Open Water, exclusive
Sail Rock every day
Why the centre you choose changes everything in Koh Tao
Koh Tao is the divers’ island — and it is also the island with the highest number of dive centres per square kilometre in the world. Some are excellent. Others run on volume. In between there are dozens of shades. A poor choice will not put your life at risk — safety is generally well regulated on the island — but it can turn a diving week you have been waiting months for into a disappointing experience.
Here are the 7 criteria that make the difference. These are not criteria invented to talk you into choosing The Divers Boat. They are the questions you should put to any centre before you book.
1. Certification — SSI or PADI, and is it recognised everywhere?
The two big certification agencies in Koh Tao are SSI and PADI. Both are recognised internationally and valid for life. The choice between them is often secondary — what matters is that the centre is officially accredited by the organisation it represents.
An SSI-accredited centre such as The Divers Boat follows strict protocols for training, safety and equipment. Always check that the centre displays its accreditation number — and be wary of centres offering “equivalent” certifications that nobody recognises.
2. Group size — how many divers per guide?
This is probably the most important criterion, and the least visible on dive centre websites. A guide looking after 8 to 10 divers underwater cannot take proper care of you. They are herding. The least experienced divers often end up trailing behind, stressed, and the dive becomes a race to keep up with the group.
A maximum of 4 divers per guide underwater — whatever the number of people on board. That is our limit and we do not go past it. You are never a number.
3. The boat — dedicated or shared?
Many centres in Koh Tao do not have their own boat. They buy seats on boats shared with other centres — sometimes 3 or 4 different centres on the same vessel. The result: mixed groups, briefings in several languages at once, shared space and an organisation that is often confusing.
We own our boats. In Koh Tao, the white boat is used exclusively for courses and Try Scuba dives, and the blue boat exclusively for certified fun divers. A third boat, the red one, runs daily to Sail Rock from Chaloklum on Koh Phangan. Your equipment stays on board — you carry nothing from one day to the next.
4. Language — will you really be taught in a language you master?
Several centres in Koh Tao describe themselves as multilingual because one instructor speaks a few words of your language. Learning to dive in a language you do not handle well is stressful — and underwater, a misunderstanding can have consequences.
Ask the question directly: do all the instructors speak that language fluently? Are the briefings, the manuals and the follow-up delivered in it from start to finish? A centre that genuinely works in your language will answer you clearly.
Our instructors teach in English and in French — fluently, not approximately. Courses, briefings, manuals and follow-up are delivered in your language from A to Z.
5. The programme — what is actually included?
The advertised price is not always the final price. Some centres charge separately for equipment, SSI e-learning, meals, transfers or even tanks. Others include everything. Before you compare two prices, compare what they include.
Every trip includes: full equipment stored on board, a dedicated guide, a hot meal (chicken and rice), fresh fruit, snacks and drinks. SSI e-learning is included in the courses. No surprises when you arrive.
6. The sites — where will you actually dive?
Not every centre offers the same sites. Some stay on the close, easy sites — Japanese Garden, White Rock — even with divers who could go much further. Others, like us, run trips to the most demanding and most beautiful sites: Sail Rock, Chumphon Pinnacle, Samran Pinnacle.
Sail Rock every day — the only centre in Koh Tao doing it. The exclusive 3S trip (Southwest + Samran + Sail Rock) on Mondays, Wednesdays and Saturdays. Samran Pinnacle, reachable by GPS only, which almost nobody else offers.
7. The atmosphere — factory or club?
Some centres in Koh Tao run on volume — dozens or even hundreds of divers a day, group briefings in a lecture room, the feeling of being on a production line. That is not bad in itself if you know what you are choosing. But if you want a human experience, where the instructors know your first name and your level, that is another story.
The best indicator? Read the Google and TripAdvisor reviews — not the overall score, the details. Do people mention their instructor by name? Do they describe a personalised experience? Or do all the reviews look alike and talk about “good organisation” without anything specific?
We are a club, not a factory. Our customers often mention their instructor by first name in their reviews. That is the best indicator we know.
The 7 questions to ask your dive centre before you book
Message us on WhatsApp or through our form. You get a direct reply — not an automated form, not a chatbot. A real person from the team.
