Basic Scuba Diver
3,800 ฿
Complete Beginners
1 Days 1 dive in the pool PLUS 2 dives in the sea # of Dives 12 Meters Max Depth
Let’s GoSCUBA Diving in Koh Tao with Big Blue Diving
5/5 5414 reviews
Discover scuba diving in Koh Tao with Big Blue Diving. Whether you are taking your first breath underwater, continuing your training or joining us for guided fun dives, our team can help you explore one of Thailand’s best-known diving destinations.
Choose from beginner certifications, advanced and professional courses, technical diving, marine conservation training and daily dive trips to sites around Koh Tao.
Upcoming Fun Diving in Koh Tao
Already certified? Join our guided fun dives in Koh Tao and explore reefs, pinnacles, wrecks and other dive sites around the island.
View the upcoming schedule below to see the planned dive sites, departure times and number of dives. Dive-site selection may change according to weather, sea conditions and diver experience.
Find the Right Diving Course or Experience
Big Blue offers scuba diving courses in Koh Tao for complete beginners, certified divers and aspiring professionals.
Choose a category below to compare introductory experiences, SSI certifications, advanced specialties, professional programmes, technical training, conservation courses and options for younger divers.
Open Water and Advanced
23,000 ฿
Complete Beginners
5 Days 9 Open Water Dives # of Dives None Prerequisites
Open Water to Divemaster
105,000 ฿
Complete Beginners
60 Days Unlimited # of Dives None Prerequisites
Open Water to Instructor
180,000 ฿
Complete Beginners
180 Days Unlimited # of Dives None Prerequisites
Scuba Diving in Koh Tao for Every Experience Level
Koh Tao offers diving opportunities for complete beginners, experienced recreational divers and people working towards a professional career underwater.
Learn to Scuba Dive
Never dived before? Our beginner scuba diving courses in Koh Tao include a one-day introductory experience, the entry-level SSI Scuba Diver certification and the complete SSI Open Water Diver course.
Join Guided Fun Dives
Certified divers can join our guided fun dives around Koh Tao. Our schedule visits a range of local reefs, pinnacles and wrecks, with site selection based on conditions and diver experience.
Continue Your Diving Education
Develop greater confidence and explore new types of diving through our advanced and specialty courses. Training options include advanced diving, rescue, deep diving, wreck diving, enriched air nitrox and underwater imaging.
Become a Dive Professional
Our professional diving programmes provide structured pathways from Divemaster training through to SSI instructor qualifications.
Explore Technical Diving
Experienced divers can progress beyond standard recreational limits through our technical diving courses in Koh Tao, including sidemount, advanced nitrox, decompression and extended-range training.
Learn About Marine Conservation
Our marine conservation courses introduce divers and non-divers to coral reefs, fish identification, sharks, sea turtles, marine ecology and underwater research.
What Divers Say About Big Blue
Read recent reviews from students and certified divers who have completed courses and joined dive trips with Big Blue Diving in Koh Tao.
5/5 5414 reviews
Absolutely fantastic place, Martin was my instructor trainer, and I could not have asked for a better person to train me. Very thorough with the training, clear in tips and ways to improve and he will make you completely ready for the IE.
robin hollema
2026-07-23
I took the Advanced Open Water course here, and I couldn’t possibly recommend this place more. Our instructors, Sara and Mustafa, were both excellent. They took great care answering questions, accommodating individual needs, and providing corrections. Safety was shown the outmost concern, which put everyone at ease. The dives themselves were very well briefed, and incredibly fun! As a whole, I’d give the experience 6 stars if I could. 🙂
Yeva
2026-07-22
Mi pareja y yo hicimos el curso Advanced y fue una experiencia increíble. Perfect buoyancy, navigation, night diving, deep diving and wreck diving, cinco inmersiones increíbles en las que pudimos perfeccionar nuestras habilidades en un entorno alucinante. Mil gracias a Sara que nos enseñó valiosas técnicas de buceo, y a Mustafá con el que disfrutamos de un tiempo alucinante bajo el agua. Sinceramente, el centro es una recomendación absoluta. Diez sobre diez!
Ignacio Luis Pérez Rey
2026-07-22
Did the Open water certification with Sara and it was an amazing experience. Learned a lot from her and she explained everything very well and clearly. Always payed attention to each student while underwater and also provided positive and constructive feedback.
Javier Martini
2026-07-23
This is an excellent dive centre. All of the staff are very helpful and make it really fun. I had several dives with Nuno who was the perfect dive master, I had such a good time with him and he helped me with everything. If u want to dive in Koh Tao this is the place to be.
André Roman
2026-07-23
Amazing experience here at big blue diving, our instructor Liam was the kindest! Will comeback here for my advance water course!!
Suryasai Vissamsetti
2026-03-07
We took our Open Water Diving Course with Big Blue Diving School on Koh Tao. Originally scheduled for March 1st, we had to postpone due to illness. They rescheduled us by two days without any hassle, which we greatly appreciated. From the moment we arrived, we were warmly welcomed and trained with passion and professionalism. The first day in the pool gave us fantastic confidence. Our instructor, Lady, was truly professional—she alleviated all our fears of deep water and guided us step by step. We learned a lot! Being a small group of four made it even better, as we felt personally cared for and safe. It was an amazing group, we had the time of our lives, and we ended with a wonderful surprise! Big thanks to Lady Jenny Ethan and Fred
2b2p2d
2026-03-07
Why Dive With Big Blue?
Big Blue Diving has operated in Koh Tao since 1991. From our base in Sairee, we provide recreational diving, professional training, technical courses and marine conservation education within one established operation.
Experienced Diving Instructors
Our team includes recreational instructors, Divemasters, instructor trainers, technical-diving educators and marine conservation specialists. Students and certified divers are matched with professionals suited to their course, experience and diving goals.
Training Facilities in Sairee
Beginner students can develop their skills in a controlled environment before entering the sea. Our facilities include a dedicated training pool, classrooms, equipment areas and spaces used by our recreational, professional, technical and conservation teams.
Our Own Dive Boats
Big Blue operates its own fleet of dive boats in Koh Tao. The fleet supports recreational courses, guided fun diving and specialist technical-diving operations.
Maintained Scuba Equipment
Scuba equipment used by the school is regularly inspected and maintained. Our operation includes a full-time certified equipment technician responsible for monitoring and servicing the equipment used by our divers.
Training Beyond Your First Course
You can begin as a complete beginner and continue through advanced, rescue, professional, technical or conservation training without needing to change schools as your experience develops.
Learn more about our team, facilities and training environment on our Koh Tao dive school page.
Why Go Scuba Diving in Koh Tao?
Koh Tao is a tropical island in the Gulf of Thailand with dive sites suitable for a wide range of certification and experience levels.
The waters surrounding the island include shallow bays, coral reefs, deeper pinnacles and wrecks. This variety allows complete beginners to develop their skills while giving certified divers opportunities to explore more challenging sites.
Dive Sites for Beginners and Certified Divers
Protected bays and shallower reefs provide suitable environments for introductory experiences and training dives. More experienced divers can visit deeper pinnacles, wrecks and sites exposed to changing currents and conditions.
Explore our guide to Koh Tao dive sites to learn about locations around the island.
Tropical Marine Life
Koh Tao’s reefs support coral, reef fish, turtles, rays, moray eels, barracuda, groupers and many smaller species. Pelagic visitors may also be encountered, although wildlife sightings can never be guaranteed.
Visit our Koh Tao marine-life guide to discover some of the species divers may see.
A Complete Island Experience
There is plenty to do when you are not underwater. Visitors can explore beaches and viewpoints, enjoy restaurants and cafés, join other activities or simply relax between dives.
Our guide to things to do in Koh Tao can help you plan time away from the dive boat.
Plan Your Trip to Koh Tao
Before booking your diving, review the practical information you need to organise your journey and stay:
Want to Learn More About Koh Tao?
We’ve got tonnes of information on our website from our blog to our Koh Tao Section… Here’s a few links to start you off.
Scuba Diving Guides and Koh Tao Travel Advice
Explore practical advice about learning to dive, improving your scuba skills, choosing equipment, protecting marine ecosystems and planning a trip to Koh Tao.
Our blog also includes dive-site guides, marine-life spotlights, conservation updates and information for certified divers continuing their training.
How Long Does the Open Water Course Take in Koh Tao?
The SSI Open Water Diver course at Big Blue Diving takes approximately two and a half days. Training is spread across parts of three calendar days and includes theory, pool-based skill development and four open-water dives around Koh Tao. You will begin on the morning of the first day, complete...
Diving Thailand with Big Blue Diving Koh Tao
If you’ve ever dreamed of floating among coral cathedrals and shimmering shoals of fish while pretending you’re the next Jacques Cousteau—only slightly more buoyant and considerably less French—then you’ll understand the appeal of Koh Tao. It’s Thailand’s scuba-diving mecca, a tiny island that somehow manages to feel...
Where Is the Best Place to Learn Scuba Diving in Thailand?
Without doubt Koh Tao. It is definitely the best place to learn Scuba Diving in Thailand due to its calm, clear waters, beginner-friendly dive sites, and professional dive schools — making it the top choice for first-time divers. While some Thai islands are known for history or...
Diving with Big Blue? Be a Great a Dive Buddy.
The art of being a responsible diver and the best buddy is to not feel like a fish out of water! Do you find yourself swimming aimlessly like Nemo lost in the Great Barrier Reef? Fear not, for I am here to bestow upon you the wisdom of the...
Learn to Dive on Koh Tao: Save 1,000Bt By Combining the Open Water & Advanced Course.
Take the plunge—literally! Learn to dive on Koh Tao with Big Blue Diving and save 1,000Bt when you book both your Open Water and Advanced Courses together for just 23,000Bt. You can even stay 5 nights in a dorm for only 2,000Bt more. Warm seas,...
Standing Out amid Koh Tao Dive Centers.
There are, by conservative estimate, approximately seventeen million dive centers on Koh Tao. Yet there is only one who have been awarded the 2026 TripAdvisor Travelers' Choice Award, placing Big Blue Diving in the top 10% of businesses worldwide with over 5,222 five-star reviews. Big Blue Diving...
When is the best weather on Koh Tao: Discover the Best Diving Months
Koh Tao, a small tropical island in the Gulf of Thailand, is often hailed as one of the world’s most accessible and affordable diving destinations. Translating to “Turtle Island,” it offers a mesmerizing blend of coral gardens, schools of tropical fish, and warm, turquoise waters. But if...
How to Try Scuba Diving in Koh Tao.
If you're a beginner looking to try scuba diving in Koh Tao, don’t panic—this guide will help you decide if scuba diving is right for you and show you exactly how to get started in the safest, easiest way possible. Having found yourself surrounded...
The 10 Best Dive Sites on Koh Tao for Certified Divers.
Whether you’re a thrill-seeker chasing deep-water pinnacles or a laid-back explorer floating through coral gardens, this list of the best dive sites on Koh Tao for certified divers is your definitive guide to the island’s aquatic gems. For certified divers seeking an adventure...
What to Expect During an Open Water Course in Koh Tao
Taking an Open Water course is the first step towards becoming a certified scuba diver. It is also completely normal to feel excited, curious and slightly nervous before beginning. During your Open Water course in Koh Tao, you will learn how scuba equipment works, practise essential skills in a swimming...
Why You Should Try Scuba Diving Koh Tao. You’ll Never Forget Your First Time.
There are few things in life that feel more delightfully absurd than taking a deep breath… underwater. The first time you do it, your brain — a dependable if occasionally overcautious organ — immediately screams, “No, you fool! We don’t breathe here!” But you do....
Koh Tao Dive Sites: Red Rock, White Rock & Green Rock.
If you’ve ever gone scuba diving in Thailand, chances are you’ve heard about the famous Koh Tao dive sites — that small island that punches well above its weight in coral, sea turtles, and dive certifications. Koh Tao, which literally means “Turtle Island,” is...
Start Your Koh Tao Diving Adventure
Take your first diving course, continue your education or join us for guided dives around Koh Tao.
Explore our scuba diving courses, view the latest fun-diving options or contact our team for help planning your diving.
