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
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.
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.
Award-winning Beachfront Dive Resort
VARIETY OF
ACCOMMODATION
2 X CUSTOM BUILT
DIVE BOATS
2 x SWIMMING
POOLS
AIR CONDITIONED
CLASSROOMS
FREE
WIFI
25 + YEARS
EXPERIENCE
BEACH
BAR
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
Colby Dean Turner
09:46 06 Mar 26
I looked around at many dive shops to do my Open Water and Advanced Open Water courses with and many of the staff at these places when I asked about Crystal, said that they ran a really good school. They recommended it more than their own shops. I was so happy diving at Crystal. They run great courses and awesome fun dives! The staff are so much fun! I was getting chocked up saying goodbye to my instructors. Khosro and Todd are absolutely legends!!! They’re the type of instructors that genuinely want to teach you and will also go out for a beer and shoot the shit with you while having a laugh. Really going to miss seeing those guys everyday. I originally had only planned to do 1 week, but extended it to 2 weeks after having so much fun. Also be sure to get some underwater photos taken from Zoey.
Илья Зыскунов
08:20 06 Mar 26
Fun dives with Crystal Dive Koh Tao!
I just finished my Open Water Diver course two days ago and stayed for some fun dives with Crystal Dive. It was a great experience.
Special thanks to our guide, Aman. He is very experienced and clearly knows his job well. Since I’m a new diver, I really appreciated all the tips and pointers he gave me along the way. He was very helpful to everyone in the group and kept showing us interesting things underwater.
I also enjoyed diving with the rest of the group—it was a cool atmosphere. I’m especially grateful to the guys Lexa and Jeroen who were filming and taking photos; it was awesome to get those shots. Thanks to Aman and the whole team for a great time!
I just finished my Open Water Diver course two days ago and stayed for some fun dives with Crystal Dive. It was a great experience.
Special thanks to our guide, Aman. He is very experienced and clearly knows his job well. Since I’m a new diver, I really appreciated all the tips and pointers he gave me along the way. He was very helpful to everyone in the group and kept showing us interesting things underwater.
I also enjoyed diving with the rest of the group—it was a cool atmosphere. I’m especially grateful to the guys Lexa and Jeroen who were filming and taking photos; it was awesome to get those shots. Thanks to Aman and the whole team for a great time!
Kali Röhdl
08:51 04 Mar 26
I just completed my Open Water Diver course at Crystal Dive Koh Tao, and it was an absolutely incredible 3-day experience! A massive shoutout to my instructors, Tom and Jack. They were professional, patient, and made me feel completely safe and confident from the very first breath underwater. Crystal Dive has a great setup, but it’s instructors like Tom and Jack who make it special. If you’re coming to Koh Tao to get certified, definitely ask for these guys. Thanks for an unforgettable start to my diving journey!
Oda Ueland
04:23 15 Feb 26
I had the most amazing experience taking the open water course with Crystal Dive! My instructor Todd was incredible, the way he taught us everything was so professional. He was so good with communication and answering questions. He was also such a funny guy that made the experience even better! This was my first time diving, but I felt very safe the whole time. It was amazing to explore the big underwater world! We saw many cool creatures and corals!
Sarah
08:01 10 Feb 26
An absolutely amazing experience! We didn’t just have a highly professional instructor (Kelvin), he was also incredibly friendly, warm-hearted and funny, which made the open water course not only very educational but also a lot of fun 😁
I really appreciated that we were such a small group (only three people), which meant the instructor could take plenty of time for each of us. He always made sure everything was well understood and that we felt completely safe.
After we had learned all the necessary skills, we were also very well guided during the dives in the open water. This allowed us to fully enjoy the beautiful underwater world while feeling safe and confident at all times.
I can absolutely recommend this dive center. Everything was well organized, very professional, and so much fun & would happily do next courses again here 🐠
I really appreciated that we were such a small group (only three people), which meant the instructor could take plenty of time for each of us. He always made sure everything was well understood and that we felt completely safe.
After we had learned all the necessary skills, we were also very well guided during the dives in the open water. This allowed us to fully enjoy the beautiful underwater world while feeling safe and confident at all times.
I can absolutely recommend this dive center. Everything was well organized, very professional, and so much fun & would happily do next courses again here 🐠
Brad Bennett
06:57 04 Feb 26
Crystal Dive is *the* place to go if you’re looking to get into or improve your skills and experience around scuba diving. My girlfriend and I had a phenomenal experience here. We came to do our open water diver certification, and ended up extending our stay to dive longer. Our instructor Evandro was a fantastic teacher – he is knowledgeable and hilarious and made the learning process engaging and exciting. We will definitely be coming back to dive again, and would highly recommend Evandro as an instructor 🤙🏼
It was also great to see how Crystal works to protect the marine life and practice reef responsibility. Their high standards made me feel like I could enjoy the experience and know that by supporting Crystal, I’m supporting the environment that’s so exciting to explore with scuba diving.
It was also great to see how Crystal works to protect the marine life and practice reef responsibility. Their high standards made me feel like I could enjoy the experience and know that by supporting Crystal, I’m supporting the environment that’s so exciting to explore with scuba diving.
Stanley Daniels
04:24 26 Jan 26
Had an awesome 5 days with Kelvin, doing our open water and deep diver certifications. Kelvin was a really personable and friendly instructor, and made both courses very
fun and easy to grasp. We were even treated to a rare sight of a whale shark, which topped off the experience. Would highly recommend both kelvin and crystal dive school!
fun and easy to grasp. We were even treated to a rare sight of a whale shark, which topped off the experience. Would highly recommend both kelvin and crystal dive school!
Peter T
11:34 19 Jan 26
The best dive school on Koh Tao. Well organised with friendly and capable instructors and a strong focus on skills and safety. I enjoyed the experience so much that after my OpenWater and Advanced OpenWater I extended my stay for Wreck, Nitrox and Deep. After diving, the Crystal restaurant and the Crystal bar were fun places to meet up with fellow divers and instructors. A big thank you to the entire Crystal team for a great time!
Can Akin
08:42 12 Jan 26
We signed up for 3-day Open Water certification course with Crystal Dive and had a very positive experience. Everybody was very welcoming and professional. Although we had to change parts of the schedule and cover a lot of material in a short time, it was always ensured we learned everything properly.
We did 4 dives and ended up signing up for 2 additional fun dives. Starting out with a fear of sharks and being underwater in low visibility, I found myself enjoying the experience and will definitely be returning! Special thanks to Todd for being a legend through this whole experience and always keeping it fun while remaining professional.
We did 4 dives and ended up signing up for 2 additional fun dives. Starting out with a fear of sharks and being underwater in low visibility, I found myself enjoying the experience and will definitely be returning! Special thanks to Todd for being a legend through this whole experience and always keeping it fun while remaining professional.
Lu Alex
15:10 11 Jan 26
I didn’t know what I do right to deserve such a lovely instructor Na to teach my rescue course. It goes way more fun than I expected😭😭😭 in the end I keep extending my stay here and sign up for more course
I was bit worried about my rescue diver course since I heard extreme opinions on it. With 60 dives to come in, i realize an instructor/ dm can affect my learning experience, especially in the overwhelming sessions, like OW or rescue. Buuuuuuuuut Na was making it such a lovely memory at the beginning of 2026.
She is super super patient, compassionate, extremely confident in the water. She can handle all my weird random questions, and give me bit challenge to drive me forward, which I 1000000% appreciated. I followed up with nitrox and wreck diving course with her, which was the moooooooost cool thing I have done
Anyway if you are looking for a good experience learning diving, find Na. Or it will be you that’s missing out tho ✨✨✨✨
I was bit worried about my rescue diver course since I heard extreme opinions on it. With 60 dives to come in, i realize an instructor/ dm can affect my learning experience, especially in the overwhelming sessions, like OW or rescue. Buuuuuuuuut Na was making it such a lovely memory at the beginning of 2026.
She is super super patient, compassionate, extremely confident in the water. She can handle all my weird random questions, and give me bit challenge to drive me forward, which I 1000000% appreciated. I followed up with nitrox and wreck diving course with her, which was the moooooooost cool thing I have done
Anyway if you are looking for a good experience learning diving, find Na. Or it will be you that’s missing out tho ✨✨✨✨
Sydney Mclennan
07:22 30 Dec 25
I had the best experience completing my 3-day Open Water certification with Alex. From start to finish, everything was well organized, fun, and professional. We did 4 amazing dives after learning in the pool the first day, and I honestly learned so much over the course of the program. It never felt rushed or overwhelming, just really well taught thanks to Alex.
Alex was absolutely incredible. He explained everything clearly, always made sure we felt safe and confident, and somehow kept things fun the entire time. You could tell he genuinely cared about us learning properly, not just ticking boxes. I came away feeling knowledgeable, comfortable in the water, and excited to keep diving. He even gave us a ton of recommendations for non diving activities and places to eat around the island !!
The course was 10,000 baht per person, which was great value for how much instruction, dive time, and support we received. There were zero problems or issues the whole time, and everyone involved was so friendly and welcoming.
This place is the perfect mix of total professionalism and genuine fun. I couldn’t recommend it more and would absolutely dive with them again. If you’re thinking about getting certified, do it here, you won’t regret it!
Alex was absolutely incredible. He explained everything clearly, always made sure we felt safe and confident, and somehow kept things fun the entire time. You could tell he genuinely cared about us learning properly, not just ticking boxes. I came away feeling knowledgeable, comfortable in the water, and excited to keep diving. He even gave us a ton of recommendations for non diving activities and places to eat around the island !!
The course was 10,000 baht per person, which was great value for how much instruction, dive time, and support we received. There were zero problems or issues the whole time, and everyone involved was so friendly and welcoming.
This place is the perfect mix of total professionalism and genuine fun. I couldn’t recommend it more and would absolutely dive with them again. If you’re thinking about getting certified, do it here, you won’t regret it!
Jessie Cuthbert
04:50 21 Dec 25
My boyfriend and I did the 4 day open water certification with Crystal Dive Koh Tao and it was an amazing and unforgettable experience!
Our dive instructor, Tom was so knowledgeable and made it such a memorable, fun and safe experience for us! We started in the pool learning the basic skills then moved onto the ocean the next day. Tom explained everything clearly and was always open to answering any questions we had.
The rooms were gorgeous with free water at reception and all the dive equipment handled very well.
We also did a lot of research of different dive schools on Koh Tao, this was the best bang for your buck with staying 4 nights.
They also had a very cute dog.
Our dive instructor, Tom was so knowledgeable and made it such a memorable, fun and safe experience for us! We started in the pool learning the basic skills then moved onto the ocean the next day. Tom explained everything clearly and was always open to answering any questions we had.
The rooms were gorgeous with free water at reception and all the dive equipment handled very well.
We also did a lot of research of different dive schools on Koh Tao, this was the best bang for your buck with staying 4 nights.
They also had a very cute dog.
Amber Goodger
03:16 21 Dec 25
Started with no diving experience at all and finished as advanced open water divers! We had an amazing experience at Crystal, our instructor Kelvin was great and made us feel safe the entire time while making sure the whole experience was super enjoyable. All of the other staff were very friendly and helpful and the accommodation included in the course was perfect and clean. Would absolutely recommend this diving school and instructor Kelvin! We will be back to do our diving masters one day!
lieluniverseseraph 2
01:37 21 Dec 25
I had an amazing experience at this diving centre. We started with zero experience and finished as Advanced Open Water Divers, and I honestly couldn’t have asked for a better journey.
Our instructor, Oli, was exceptional. Extremely professional, calm, knowledgeable, and confident. From the very first dive, he made everything feel safe, clear, and well-structured. His explanations were precise, his attention to detail was impressive, and he always made sure we truly understood what we were doing — not just following instructions.
What really stood out to me was the balance between serious training and enjoyment. Oli pushed us to improve while always respecting our limits, which made every dive both challenging and fun. I felt completely confident underwater thanks to him.
Highly recommended for anyone who wants to learn diving the right way, with a top-level instructor and a great atmosphere.
Our instructor, Oli, was exceptional. Extremely professional, calm, knowledgeable, and confident. From the very first dive, he made everything feel safe, clear, and well-structured. His explanations were precise, his attention to detail was impressive, and he always made sure we truly understood what we were doing — not just following instructions.
What really stood out to me was the balance between serious training and enjoyment. Oli pushed us to improve while always respecting our limits, which made every dive both challenging and fun. I felt completely confident underwater thanks to him.
Highly recommended for anyone who wants to learn diving the right way, with a top-level instructor and a great atmosphere.
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