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Dive in &
Defy Gravity

At Hydronauts Diving Resort Koh Tao

From your first breath underwater to advanced skills, our RAID scuba diving courses are built around small groups, personal attention, and lasting confidence. We’ll guide you from beginner to confident diver, one dive at a time.

Our Most Popular Courses

Try Dive
Not ready to commit to a full course? Try scuba diving in a fun, easy session with an instructor.
3,500 THB
Open Water 20
Earn your first scuba certification to 20 meters. Learn in small groups with top-quality gear.
11,000 THB
Explorer 30
The next step after Open Water. Improve your buoyancy, navigation, and deep-diving skills.
10,000 THB
Sidemount
Not ready to commit to a full course? Try scuba diving in a fun, easy session with an instructor.
15,500 THB
RAID

Fun Diving at Koh Tao's Best Sites

Personalised, relaxed, and led by dive guides who know Koh Tao’s best spots like the back of their hand.

Join our small groups for guided fun dives at Koh Tao’s best reefs and wrecks. With calm conditions, vibrant marine life, and our own dedicated dive boat, every dive is a chance to see something new.

  • Morning & afternoon dive trips
  • Max 4 divers per guide
  • High-quality gear included
  • Chance to see whale sharks
  • Suitable for all certified divers

Why Choose Hydronauts?

  • Expert Instructors Who Care Expert Instructors Who Care Our passionate RAID-certified instructors tailor every dive to your needs. We focus on safety, skill development, and making sure you feel comfortable and confident underwater.
  • Small Groups Big Impact Small Groups, Big Impact With a maximum of four divers per instructor, you’ll get the time and attention you need — whether that’s extra coaching to master a skill or the freedom to explore without feeling rushed.
  • Better Gear for Better Diving Better Gear for Better Diving We teach and dive using backplate and wing setups for a more streamlined, comfortable, and controlled diving experience.
  • Internationally Recognized Certification Internationally Recognized Certification Complete your RAID course with us and earn an internationally recognized e-certification — giving you access to diving opportunities all over the world.
  • Global Reef Partnership Global Reef Partnership We’re proud to support Global Reef’s mission of protecting Koh Tao’s marine ecosystems. With many of our dive pros trained through their internship, conservation is part of the way we dive and teach.
  • Beachfront Dive Resort Beachfront Dive Resort Stay just steps from the ocean. Our resort has a fully equipped dive center, training pool, café, restaurant, and beach bar — everything you need for the perfect diving holiday in one place.
  • Committed to the Ocean Committed to the Ocean We keep our courses and operations eco-friendly, using minimal paper and plastic. All learning materials are online and yours to keep for life.