Don’t just dive…

DEFY GRAVITY

Welcome to Hydronauts Diving Resort

Discover the art of scuba diving the RAID way at Hydronauts Diving Resort, where each dive is an adventure into the extraordinary. Situated on the pristine shores of Koh Tao, Thailand, we craft a diving experience that blends exploration, education, and uncompromising safety. Our beachfront haven, equipped with the finest gear and offering intimate group sizes, welcomes divers from every skill level. At Hydronauts, we are committed to our mission and “defy gravity” underwater, creating tailored experiences that make each dive unforgettable. From beginner courses to advanced technical training, our focus is on delivering quality instruction rooted in sustainability.

“The sea, once it casts its spell, holds one in its net of wonder forever” -Jacques Cousteau 

RAID Logo and tagline
Two scuba divers learning in a pool environment.

open water 20

Learn to scuba dive on Koh Tao, where the ocean unveils its hidden wonders. Take the plunge and earn your Open Water Scuba Diver certification, unlocking unparalleled underwater adventures.

No previous experience is required—just a passion for exploring the extraordinary.

Diver entering the water backwards.

try dive

A Try Dive is a great way to experience scuba diving on Koh Tao if you are short on time.  Or perhaps you would like to get a feel for it before signing up for the Open Water 20 course. Immerse yourself in the vibrant marine life and feel the thrill of breathing underwater, even if just for a short while.

Diver obscured by large school of fish.

fun diving

Twice daily excursions to scuba dive Koh Tao’s beautiful dive sites. Whether you’re an experienced or newly certified scuba diver, our skilled dive leaders will guide you on an excursion through the world’s most varied ecosystem. Each dive reveals something new, offering a unique glimpse into the wonders that lie beneath the surface.

Two people Scuba Diving

Explorer 30 - Advanced

This is the logical next step after completing Open Water 20. Over five dives, you will receive advanced training in buoyancy control, navigation, deep diving (30 meters), and two elective dives of your choice. Night and Wreck dives are the most popular electives, offering unique and thrilling underwater experiences.

Scuba diver swimming through a school of fish.

DEEP 40

Unlock access to some of the world’s most renowned dive sites and captivating shipwrecks by extending your depth certification to 40 meters. Explore deeper, more thrilling underwater realms and experience the best that diving has to offer.

Scuba diver descending into the blue surrounded by bubbles.

Nitrox - Enriched Air

Looking to extend your time at a specific depth? Breathing Enriched Air Nitrox lets you stay submerged longer, enhancing your dive experience.

Reserve your space...

Are you ready to become a dive professional?

We got 99 problems, but our trim ain’t one.

Earning your Divemaster certification is the first step to becoming a professional diver.

Are you ready to become a dive professional?

We got 99 problems, but our trim ain’t one.

Earning your Divemaster certification is the first step to becoming a professional diver.  

Why Choose Hydronauts?​

RAID Instructors​

Our experienced instructors are hand-picked, highly trained, and passionate about scuba diving. We tailor each course and dive to your unique needs.

Beachfront Diving Resort​

Southwestern-facing property including a dive shop, hotel, training pool, cafe & restaurant, dive boat, and beach bar. We offer diving & accommodation packages for every budget.

Guaranteed Small Groups

We guarantee small groups of no more than four students to an instructor or dive guide so that you get the individual attention you deserve.

State-of-the-Art Equipment

We choose to dive and teach in Backplate & Wing BCD with a Long-hose, Short-hose regulator configuration favored by technical divers.

Dive Anywhere in the World

Upon completion of your RAID scuba diving course, you will be issued with an e-certification card that recognizes you as an internationally certified scuba diver.

Low Carbon Footprint

We make every effort to reduce our footprint and use of paper and plastic. All our course materials are hosted online giving you access for life.

Customer Reviews

What our customers are saying on Google

“My favourite thing to do on this planet is to scuba dive” – Buzz Aldrin (Astronaut)

Keep up with the HYDROBLOG

Open Water Course on Koh Tao | A Step-by-Step Guide of What To Expect

Student divers in a pool learning from an instructor.
The blog post on the Hydronauts Diving website discusses what to expect during an Open Water Course in Koh Tao, Thailand. It details the structure of the course, which includes classroom sessions, confined water training, and open water dives. The post also highlights the vibrant underwater environment of Koh Tao, making it an ideal location for beginners. The course is designed to equip students with the skills and confidence needed to dive safely and enjoyably.

5 Things To Do on Koh Tao After Covid

As borders open up and entry restrictions disappear, travellers and ocean lovers are finally making their way to the islands of Thailand for diving adventures. While the island of Koh Tao is known for its top-rated scuba diving courses, there are so many other things to do on Koh Tao. With new shops, activities, bars, and restaurants opening up after the storm that was Covid, everyone is sure to find something they love.