scuba divers swimming under water

Explore further with the SSI Deep Diving Specialty

SSI Deep Diving Specialty

Unlock the mysteries of the deep! This course equips certified divers to explore depths up to 40 meters safely, revealing new dive sites and unique marine encounters in Koh Tao’s best dive sites like Chumphon and Sail Rock!

Level

Advanced

Course

Duration

1.5

Days

Max Depth

40

Meters

Cost

฿8,000

Thai Baht

The Learning Experience

Perfect for certified divers wanting to enhance their underwater experiences, the SSI Deep Diving Specialty Course offers a comprehensive exploration of deeper diving. This program includes theoretical lessons combined with three supervised deep dives, where you’ll learn critical safety protocols, dive planning, and techniques necessary for deeper exploration. Upon completion, you’ll be certified to dive down to 40 meters, opening the door to exhilarating deep-water sites and encounters with unique marine life rarely seen at shallower depths.

Ready to start your adventure?

What’s included

What to bring

Prerequisites

Itinerary

09:00-11:00 Deep diving academic session
11:00-11:30 Air consumption check and dive planning
11:30-12:30 Break
12:30-17:00 Deep dives 1+2 (max. 30m)
17:00-17:30 Debrief

08:00-12:00 Deep dive 3 (max. 40m)
12:00-12:30 Certification and celebration :)

SSI Deep Diving Specialty

Unlock the mysteries of the deep! This course equips certified divers to explore depths up to 40 meters safely, revealing new dive sites and unique marine encounters in Koh Tao’s captivating waters.

All activities start the day after arrival on the island.

฿8,000

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