Group of friends enjoying a scuba diving adventure on a boat near a tropical island.

Transform Your Diving Journey with the SSI Divemaster Course in Koh Tao

SSI Divemaster

Koh Tao is a top destination for Divemaster training, renowned for its stunning dive sites and vibrant marine life. The SSI Divemaster Course is your gateway to becoming a professional scuba diver enabling you to guide fun dives, lead underwater adventures, and share the beauty of the ocean with others.

Level

Pro

Course

Duration

6-8

Weeks

Cost

฿39,000

Thai Baht

The Learning Experience

Take your scuba diving skills to the next level with the SSI Divemaster Course in Koh Tao, an unparalleled opportunity to immerse yourself in the underwater world. This course is perfect for divers wanting to gain confidence in leading and organising dives, to introduce new divers to the beauty of the ocean, and get experience assisting instructors. Whether your goal is to become an SSI Instructor or simply enhance your own diving adventures, this program is tailored to develop your knowledge, skills, and expertise.

During your Divemaster training on Koh Tao, you’ll focus on three key areas: theory, water skills development, and practical assessments. Guided by our experienced Instructor Trainer and professional team, you’ll gain hands-on experience assisting with recreational-level courses, participating in instructor-led workshops, and leading dives. Koh Tao’s vibrant dive sites serve as your classroom, allowing you to refine your navigation, buoyancy, and leadership skills while exploring the island’s breathtaking marine biodiversity.

We recommend a six-week program to maximize your learning and enjoyment of Koh Tao’s incredible dive sites. As you progress, you’ll gain transferrable skills that prepare you for a future as a dive professional, opening up opportunities to dive and work worldwide.

By the end of your SSI Divemaster course in Koh Tao, you’ll have advanced diving skills, a deeper understanding of dive theory, and the confidence to guide others in discovering the underwater world. Ready to take the plunge and elevate your scuba diving experience? Start your Divemaster journey with us today!

Ready to start your adventure?

What’s included

What to bring

Prerequisites

Itinerary

Begin your Divemaster journey with a warm welcome to the Goodtime family! Settle into your new home by the stunning beaches of Koh Tao as we introduce you to our team, facilities, and your course schedule. You’ll explore the equipment room, learn about your course structure, and spend sunset at our beachfront bar.

Learn what it takes to become a successful dive professional. We will spend time in our beach side classroom covering topics such as dive physics, physiology, decompression theory and how to become a master in navigating your way around any dive site.
We will also cover what it takes to explore the depths of the ocean through a deep dive workshop and a Night dive workshop teaching you how to plan and execute a dive under the stars.
Finally we will walk you through how to set up, understand and manage your scuba diving equipment.

Refine your underwater skills through hands-on water workshops. Polish the skills you’ve learned during your dive journey and practice demonstrating them in real-life scenarios. Elevate your buoyancy to pro levels as you glide effortlessly through Koh Tao’s best dive sites.

Gain practical experience by assisting instructors in courses ranging from beginner to advanced levels. Learn how to support instructors effectively and get valuable insights into teaching techniques. These assists will prepare you for a seamless transition if you choose to advance to SSI Instructor training.

Complete your journey with final evaluations, including an exam and sign-off dives with real customers. Once you’ve demonstrated your skills and knowledge, you’ll officially join the Dive Professional family as a certified Divemaster. Celebrate your achievement with the Goodtime team and fellow divers—it’s time to toast to your success!

SSI Divemaster

Have you ever been fun diving as a qualified scuba diver? Well, that person who organises your trip for you and leads you around the dive site is a Divemaster!  The Divemaster rating is the first professional level of scuba diving qualifications, and allows you to take people fun diving every day, showing them the beautiful underwater world while you experience it for yourself again and again… and get paid for it!

All activities start the day after arrival on the island.

฿39,000


Why choose Goodtime for Scuba Diving in Koh Tao?

Smaller Groups

Max 4 students per instructor for a more personalised experience.

Later Starts

Enjoy the freedom to sleep in; we start later than most dive schools on the island.

Uncrowded dive sites

We carefully plan our dive trips to avoid the crowds.

Fully Equipped Classroom

Our beach front classroom equipped with Air-Con and WiFi is the perfect environment to learn to dive on Koh Tao.

Highly experienced instructors

Our professional SSI instructors are passionate divers with extensive local knowledge.

Speed boat

We have our very own speedboat that allows us to travel to further dive sites in the quickest time possible.

Reviews

google Rating
4.9
Based on 1,435 Reviews
Martin Butzbach
31 December 2025

I had the best experience taking my Open Water Diver Course. Ryan was a really skilled instructor who is good at teaching, and he was very patient with us. In addition, a huge thank you goes out to the rest of the team behind Goodtime, who helped create a great atmosphere every day.

Felice W
29 December 2025

I really loved the open water course with our amazing instructor Ana! She is amazing!!!! Also Andrea went with us and he is so lovely too! Loved Livia and Lidia too! Deffo recommend this dive school.

Diego-Ignacio Briones
28 December 2025

Had a great scuba diving experience. Lidia was clear, patient and very accommodating as a trainer. Andrea took amazing videos for us. Such a great bonus!

Finley Blower
28 December 2025

We had the best experience diving with Goodtime Adventures in Koh Tao. From the very first enquiry, Charley was excellent—friendly, helpful, and incredibly accommodating. A lot of the dive sites we really wanted to tick off before leaving Koh Tao were on our list, and both Charley and Mira went out of their way to make that possible for us. We did 5 dives with Mira at Chumphon, 313 wreck & No Name Pinnacle, Tao Tong, Pottery, and a night dive at White Rock. Every dive was fantastic and thoughtfully planned. It was my first ever night dive and Mira made me feel completely comfortable and confident throughout. We had Mira for the whole day, which meant we were able to properly get to know her—she was funny, relaxed, and easy to be around while still being extremely professional and attentive underwater. We loved sharing our dives with someone so passionate about the ocean and the diving industry. We usually dive with PADI centres but have had a few negative experiences recently, so we decided to dive with an SSI crew this time and we’re really glad we did. The overall experience felt personal, well run, and genuinely enjoyable. Couldn’t recommend Goodtime Adventures enough—an amazing team and an unforgettable diving experience. The whole team have certainly earned a beer. 🍺 Thanks again, Jack and Finley 😁

Jesper Frandsen
27 December 2025

Me and my boys went diving with Lydia and Andrea a few days ago. We had the best possible experience and both Lydia and Andrea were great with the boys. Super fun and safe fun dives. Later on Lucas and Anna went out of their way helping ud out with “diplomas” for the kids! Hope to come back!

Robbie Kolonic
24 December 2025

Completed my Open water diver course here with Joe and Ryan. Though the whole team was great, really friendly, informative and patient. Joe was fantastic and made me feel really comfortable underwater, can't thank him enough. If I decide to do more advanced programmes it'll probably be with these guys, can't recommend them enough!! ❤️