Open Water Diver Koh Tao: 3 days, 4 ocean dives

Dive into Koh Tao’s top sites with your first certified 18-meter open water experience

You complete three days of academics, pool training, and four ocean dives around Koh Tao, progressing from 12 meters to the full 18-meter limit. All equipment is provided, and you walk away with a digital PADI certification card that's valid worldwide. The final two dives are pure exploration: no drills, just diving on some of Koh Tao's best sites.

Step-by-step itinerary

Day 1: Academics and confined water skills

• Meet instructor and students
• Attend first academic session
• Lunch break
• Confined skills session in afternoon

Day 2: Academic session and confined water dives

• Morning academic session
• Boat to dive sites
• Confined water training dive 1
• Confined water training dive 2

Day 3: Open water dives and final exam

• Dive 1 at 18 meters max depth
• Dive 2 at 18 meters max depth
• Final exam at school

The experience

So you're sitting in a classroom on day one, and your instructor is walking you through the physics of pressure and buoyancy, and you're thinking "okay, this is actually important stuff", not just safety theater, but real knowledge you'll need down there. Then you're in the pool that afternoon doing your first confined water session, getting used to the regulator in your mouth, learning to clear your mask underwater, and suddenly it clicks that this is actually happening. By the end of day one on Koh Tao, you've done the academics and your first training dives in controlled water, so you're not walking onto a boat on day two as a complete beginner.

Day two is where it gets real. You're heading out on the boat in the morning after another academic session, and your instructor takes you to two different dive sites around Koh Tao: still confined water training, still a maximum depth of 12 meters, but now you're in the actual ocean with real currents and real fish and real depth beneath you. The dive sites here are calm and clear, which is why they use them for courses. The visibility is good enough that you can see what you're doing, and the conditions don't throw curveballs at you while you're still learning. Your instructor is right there, watching every move, and you're practicing the skills that matter: equalizing pressure, controlling your buoyancy, staying calm when something feels off.

Day three is the payoff. Two dives at the maximum depth you're certified for, 18 meters, and this time there's no training, no exercises, no instructor hovering over you checking off a checklist. You're just diving. You're seeing the reef, the fish, the actual underwater landscape you came here for, and you're doing it as a certified diver. After those two dives, you sit down for the final exam at the school, and then you've got your digital certification card. You can dive anywhere in the world up to 18 meters with a certified buddy, and you didn't need to fly somewhere else or spend a week doing it.

The course includes all the equipment (tank, wetsuit, BCD, regulator, the whole setup), so you're not renting pieces from five different shops or figuring out what you actually need. Coffee and tea are there between sessions, which sounds small until you're sitting in the heat between dives. You get the online theory material to work through, and the pool training happens in controlled water before you're anywhere near the ocean. It's structured so that by the time you're at 18 meters on day three, you've already practiced everything in shallower water.

What’s included

• Online theoretical material covering diving physics, safety, and procedures.
• one confined water training session in a pool.
• full SCUBA equipment including tank, regulator, BCD, and wetsuit.
• four open water dives in the ocean around Koh Tao.
• digital PADI certification card.
• coffee and tea between sessions.

Options for this experience

2 options

Open Water diver certification in three daysGuide in 6 languages · 09:00Pickup is included with this certification course.

Certification with two nights in a dormGuide in 6 languages · 09:00Stay in a shared dorm at Nirvana Guesthouse, with pickup included.

You pick the guide language when booking.

You see the exact price of each option when you check availability.See dates & prices

Before you book

Days and timesEvery dayDeparts at 09:00

AgesAdult (18 to 80 years) · Youth (10 to 17 years) · Under 10: can't be included in the booking

Meeting point and pickupHotel pickup is optional; you can also go straight to the meeting point. Ends back at the starting point.You can choose from 6 pickup points.

Cancellation and refundsFree cancellation up to 24h before the start. After that, no refund.It may be canceled due to bad weather. If that happens, you're offered another date or a refund.

Prices and times updated today

Good to know

Moderate physical levelPublic transport nearbyNot for pregnant travelersNot for heart conditions

Operated by Koh Tao Scuba Club

Is this one for you?Right for anyone who wants to dive independently after the course without arranging training elsewhere. Three days is what it takes to go from zero to certified at 18 meters. You need moderate fitness and should be comfortable in water, since the pace moves from pool to ocean dives by day two.

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Top questions

What languages is the guide in?

Live guide in English, Spanish, French, German, Thai and Dutch.

Can children come?

Yes. Ticket types: Youth (10 to 17 years). Under 10: they can't be included in the booking.

What happens if it rains?

It may be canceled due to bad weather. If that happens, you're offered another date or a refund. Free cancellation up to 24h before the start.

How deep can I dive after the Open Water certification?

Maximum depth of 18 meters with a certified buddy. Days 1–2 training dives are limited to 12 meters. Days 3 dives reach the full 18-meter limit.

What's included in the course fee?

Online theory materials, pool training session, all SCUBA equipment (tank, regulator, BCD, wetsuit), four ocean dives, digital certification card, and coffee/tea between sessions.

Do I need diving experience before starting?

No. The course is designed for beginners. You need a moderate level of physical fitness and should not have serious cardiovascular issues or be pregnant.

What are the dive sites like around Koh Tao?

Calm, clear water with good visibility and suitable depths for training and certification dives. Conditions are generally very good, making Koh Tao ideal for open water courses.

When do I get my certification card?

After completing the final exam on day three, you receive a digital PADI certification card that is valid worldwide.

Is there a minimum fitness level required?

Yes, at least a moderate level of physical fitness. The course is not recommended for travelers with poor cardiovascular health or those who are pregnant.