Crystal Dive Koh Tao

Crystal Dive Koh Tao has been teaching diving on Koh Tao for over 25 years—we’re one of the originals.

Our beachfront dive resort is one of the best places for SSI dive courses on Koh Tao, and our SSI Diamond Instructor Training Centre is led by some of the most experienced SCUBA trainers in Southeast Asia.

Learn to dive on Koh Tao with Crystal!

Why Choose Crystal Dive Koh Tao?

We are proud to have been a leader in safe yet fun SCUBA training for over 25 years. With over 100,000 divers trained, we believe our standards speak for themselves.

At Crystal Dive, we teach 45+ SSI dive courses from our beachfront dive resort so that your SCUBA skills have room to grow in whatever direction you want. With specialty courses like Independent Diving, Shark Ecology and Coral Restoration, and pro-level courses like the SSI Instructor Training Course, Crystal Dive Koh Tao can help you take your diving to some unexpected places

Learn to dive on Koh Tao – with Crystal

When it comes to SSI dive courses on Koh Tao, we have everything from beginner-level courses, advanced specialties like Deep Diving and Nitrox, to professional courses to get you working in the dive industry.

BEGINNER DIVING COURSES

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New to diving? Learn to dive on Koh Tao with our SSI beginner courses and take the first steps to experiencing a whole new underwater world.

BASIC DIVER

OPEN WATER CERTIFICATION

SCUBA DIVER

ADVANCED DIVING COURSES

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Already a certified diver? Nab a few SSI specialty courses so that you can dive deeper, dive safer, explore sunken shipwrecks, improve your buoyancy control, and better understand the ecology of the marine world.

ADVANCED ADVENTURER

STRESS & RESCUE COURSE

DEEP DIVING SPECIALTY

ENRICHED AIR NITROX

WRECK DIVING SPECIALTY

PROFESSIONAL DIVING COURSES

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Turn SCUBA diving into a career with our professional-level SSI training courses. As a top Instructor Training Centre on Koh Tao, our instructors will get you started on the right foot in the industry.

DIVEMASTER COURSE

DIVEMASTER LIFESTYLE PACKAGE

INSTRUCTOR COURSE

INSTRUCTOR LIFESTYLE PACKAGE

Award-winning Beachfront Dive Resort

2 Custom Built Dive Boats

2 Swimming Pools

Air Condition Classrooms

Free Wifi

25+ Years Experience

Beach Bar

Accommodation

Discounted Accommodation on Koh Tao

At Crystal Dive Koh Tao, we offer a variety of different accommodation options, many of which feature discounts on the days that you’re diving with us.

See our Accommodations page for our current discounts and stay with us for less!

What People Think About Our SSI Dive Courses on Koh Tao

Crystal Dive Koh Tao

4.9

Based on 1166 reviews

review us on

Daniel Haimson

12:03 27 May 25

Highly recommended diving school. Very close to the pier you arrive in the island (and this doesn’t mean unpleasant at all, pretty nice place and clean beach). Did my first dive ever (basic and advanced open water courses). Big highlight was my instructor EVAN . Very Didactic and professional, good vibe, care for your experience .They offer awesome accommodations for a very cheap price for the time of the course, so it’s super convenient to go right away when you get to the island and then go explore more after the course. Also offer discount for the second course and in the store. Very well structured, 25 years olds school , lots of friendly people and staff for all over the world .

Frieder Wei

07:56 27 May 25

Highly recommend doing your Open Water Diver, and maybe even the Advanced Adventurer right after, with Crystal Dive Koh Tao. I did both certifications there and had the pleasure of being taught by Evandro, who made the entire experience truly outstanding.Evan is not only incredibly knowledgeable and professional, he took the time to make sure every one of us felt safe, confident, and comfortable at all times – whether it was in the pool or 18 meters deep. He went above and beyond what was required, always checking in with us individually, giving detailed feedback, and adapting his teaching style to our pace. What stood out even more is what a genuinely great person Evan is – calm, positive, and super easy to spend time with both in and out of the water.Also worth noting: Crystal Dive offers discounted accommodation (300 baht/room) right at the dive school, which makes the whole experience even more relaxed and easy.Couldn’t have asked for a better introduction to diving – thank you, Evan and the Crystal Dive team!

Tiernan Shaw

12:56 23 May 25

Absolutely fantastic experience completing our Open-Water Diving Course with Crystal! The staff are all so friendly and we just felt really comfortable at all times (even when slightly out of our depth!). Loved it so much that we immediately signed up for two more dives the following day to work towards our Advanced Course. Special thanks to our very lovely and very patient instructor Alex who made it super fun and relaxed throughout. Could not recommend enough!

Yannic de Haan

23:00 15 May 25

I have done my Divemaster program with crystal the last few months, it was one of the best expiriences ever! First of all, everything is professional, they have nice equipment, an maintenance team, surface cover for on the boat and many more. I chose crystal because of these things. Crystal also makes their Divemasters familiar with these aspects of diving during the program by giving small internship like expiriences. Next to it it was also AMAZING and really fun, the team is great, the atmosphere is fantastic and overall it was a lot of fun!

Haas

13:33 15 May 25

I did my stress and rescue course, and then my Divemaster program, just about to start my instructor course tomorrow.Crystal Dive has the best facilities on the island and a really good flow of operation, everything is always on point. Also, the whole team is super chill, energetic and happy to help.Can't recommend this experience enough, it has been an amazing journey! Thank you!

Viktoria Hirl

10:28 29 Apr 25

Crystal is by far one of the best diving centers I’ve been diving with!! Did my advanced adventurer there with George and had a great time. We learned a lot in these few days and had some awesome dives and overall just a great time. Also did some fun dives with Anna who was really knowledgeable about the sea live at the dive sites. It feels like being part of a big family diving with them and overall very professional and knowledgeable dive center and staff. I will definitely be back!! Thanks you guys!

Anitaya Sisaath

09:12 27 Apr 25

Had such a great time learning to dive at Crystal Dive Koh Tao. We were beginners and decided to do the 3 day open water course and were lucky to have Todd as our instructor. He’s super experienced and really patient, took the time to make sure we were comfortable and confident the whole way through. By the end, we felt like proper divers. Can’t recommend Todd at Crystal Dive enough!

Connor Mousley

12:52 27 Mar 25

Had the most amazing experience at Crystal ended up staying longer than planned and completing the advanced adventurer course and a couple fun dives, all the staff and other divers were so friendly and helpful made some great friends and memories, the accommodation I had was also really great.Attila was my instructor throughout and he made the experience perfect, he was a great teacher made everything simple and made us feel safe and confident while bringing a lot of humour too he was just an all round legend! Can’t wait to come back one day and do some more diving at Crystal!

Olivia D

14:19 23 Mar 25

I completed my Open Water Diver in January this year and if you plan on doing so too, you should definitely choose Crystal Dive. My instructor Alex was super patient, calming and created a great learning atmosphere. They are 100% focused on the diver’s safety and good experience. Thanks so much and hopefully see you again one day!

brianna Brunner

15:45 10 Mar 25

Got my open and advanced certifications with our instructor, Evan. He was professional, patient & passionate about sharing the sport with us! He was also extremely flexible with our schedule when we needed a break to recover from getting sick mid course. Not only is Crystal highly reputable on the island, it’s also a great value - 20k for both certifications with free accommodation. The rooms were also so nice and great location by the pier.

Emily van Beek

10:48 10 Mar 25

I got my Open Water with the help of Michaella at Crystal Dive! Highly recommended, both the diving school and Michaella herself.

Noah Larsen

05:53 10 Mar 25

Had a really good experience with Crystal Dive Koh Tao. Didn’t have any experience at all and didn’t know what to expect. But our instructor Alexander Gaugusch and co-instructor Darrian made us very comfortable, and really made this an amazing experience. Really good people and teachers.

Lin ZHOU

02:33 09 Mar 25

Did my dm here.Been diving with different dive centers before, crystal is definitely the most professional one from training system to gears maintenance. They teach you how to properly get things done. Open water instructors would literally go through every single skill with you which is really really essential for new divers to get comfortable and enjoy the big blue. Encouraging but not pushing, crystal instructors are authentically happy to see every diver to keep blowing bubbles. Safety is also always at top level of all, oxygen tank and first aid kits, surface cover always ready for rescue and every roll call, good connection with local clinic and hospitals, caring crews and staffs…I’m forever grateful that I walked in crystal office and decided to do my dm here.The two and half month I spent on koh Tao at crystal is crystal precious with my DMC fellows. Special thanks to my mentor Oli who is there always by my side.Good vibe only 🙂

maarten Vandeborne

04:52 07 Mar 25

Best impulsive decision to take the open water course! In a group of 3 we were teached by the amazing Vera. Over 3 days we learned almost all the essential basics because of great teaching and support of the digital SSI(divers association) platform. First session in Crystal’s own private swimingpool (4m) and the next day we were out to the ocean and already so great sea life! Amazing overal experience with the best teacher (for low price and even free accomodation which is not 5 star but still really nice 😊) 👌👌