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

Conor E.
17 June 2026

Such a lovely group of people. Professional, knowledgeable and friendly. Would highly recommended for anyone wanting to dive in Koh Tao. Thank you Liv, Lydia, Julia, Shai and Char

Paul S.
13 June 2026

This is a special place, with amazing people 🙌 Having done basic dive training on the island at the start of the month with Goodtime, we decided to return so I could complete my open water certification. Fabio is an incredible instructor and an incredible human with it 👏. He made the course really enjoyable and straightforward. We were also very lucky to see some amazing marine life 👌. Whether you're on the boat or at the bar, the atmosphere at Goodtime is always relaxed and positive. That is partly due to the stunning location but is heavily influenced by the Goodtime team. Fabio, Anna, Beth, Mike, Chris, Shy and everyone else at Goodtime will make you feel welcome and at ease. Awesome people and incredible experiences, deliver so much more than just a Goodtime 🫡

Paulina S.
12 June 2026

I had a great experience with this school! I did the 2.5 day Open Water course and when I lost my nerves due to panic, everyone was so nice and empathetic towards me. I really felt like it was their priority for me to feel comfortable and have a positive first diving experience. Thank you Shai, Carmen and Charlie, for your support and patience, and for creating a solution that made me come back for the third day, finish the course, get the license despite everything and most importantly, have a good time! 🩵🐠🤙🏽

Olivia L.
11 June 2026

Diving with good times was an amazing experience! Everything about it was great but what really made it so amazing were the dive instructors. Thank you so much to Ana and Fabio for making it such an unforgettable experience! Ana was an amazing instructor to my boyfriend who was getting his dive certification, and lead us on two fun dives. She made us feel welcome from the start and so safe the whole time! It had been 10 years since my last dive and Fabio lead me in a refresher course and made me feel totally comfortable diving again! 10/10 experience would recommend to anyone interested in diving on koh tao! And the food here is delicious too :)

Yuvraj K.
11 June 2026

Well deserved 5 star. I had gone to do my open water dive course, without having any prior knowledge, and I came out feeling so empowered lol. Chris was my main instructor, the patience of this man under water was a 10, very professional approach. Had taken a class from Anna also, which was very calming. She’s extremely good at explaining things peacefully. Lydia, also a dive instructor, present for almost all our dives brought lot of energy and calmness which resonated pretty well. Also the restaurant staff members are extremely polite and welcoming meet the whole trip a complete bliss. Definitely looking forward to do the advanced courses sometime during September.

11 June 2026

Beautiful dives and wonderful staff! Usually I can mumbles and mumble but with Good time I remained speechless!!! Big thank you for Charlie for her care and huge smile, she the instructor that new how to make me feel safe, Anna, what a great soul 😍 and last but not list - Chris