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

pleun H.
14 January 2026

Mira is a fantastic divemaster! She helped me tremendously with the refresher course; I loved it! Mira also has other great tips!

Joel L.
12 January 2026

I made my Advanced OW with Goodtime Adventures. It was the perfect experience right there. The people were very friendly in general and Max did an excellent job as a dive instructor. I felt very safe all the time and I had a lot of fun during the course. 😊

Christoph K.
11 January 2026

After two months of intensive training, tons of fun, and many wonderful experiences, I'm proud but also a little sad that I've now completed my Divemaster certification. I'd like to sincerely thank everyone who accompanied me on this journey for the tips, tricks, pleasant conversations, and activities off the water! Even the somewhat dreaded snorkel test will forever remain a cherished memory. It was simply fantastic and an incredibly satisfying conclusion to a phenomenal time. Ana, Lydia, Ezgi, Ryan, Mira, T2, Joe, Max, Andrea, Shai, Bart, and Charly, thank you so much for everything. Lydia, Gary, and Gilly, all the best and have fun for the rest of your training! Kwan, thank you so much for the excellent food when I was out on the boat longer than usual and for all the lovely conversations. A heartfelt thank you also goes to all the wonderful people behind the bar and in the kitchen of the Goodtimes Bar (Nini, Myo, Jo, etc.) – you're doing an outstanding job! Thank you so much for all the delicious food! Eimear, you're not only a master in the water, but also when it comes to food and drink. The next few Saturdays are going to be extremely tough without your fantastic spare ribs. Last but not least, Lukas – what an amazing guy!! Thank you so much for the gentle introduction to the DMT program for my ears. I learned so much from you – and not just about diving. You're a true role model, yet still so much fun! It's an honor to be part of the Goodtimes family.

Julia V.
11 January 2026

Did my rescue diver with Ana, she’s the BESTEST OF THE BEST! Liv and Michi were the assistants, amazing experience!

Ted
11 January 2026

Big thanks to @Lydia and Goodtime for an epic OW course. She made the whole experience so fun and stress-free. If you’re on the fence, look no further. This is 100% the spot for the best vibes and diving! 🤿❤️

Rafi B.
9 January 2026

Me and my friend did the refreshers course and two fun dives!! It was worth every penny the guides were amazing !!! Shay, ana and Mira !!! They are the best 💯