Fun Diving

with Hydronauts


Scuba diving on Koh Tao is unique from other places in the world because of the island’s close proximity to 25+ varied dive sites. Almost every dive site on Koh Tao is within a 10-45 minute boat ride with the infrastructure to support the number of divers who come to Koh Tao to go diving. The island is surrounded by tropical coral reefs and is home to countless species of marine life.

When scuba diving on Koh Tao, you’ll discover coral gardens, shipwrecks, underwater pinnacles, coral walls and artificial conservation reefs. The Gulf of Thailand is known for its consistently calm and clear waters–and incredible sunsets–which offer ideal conditions for a relaxed and scenic experience.

Our dive guides at Hydronauts are highly-trained, local area experts that have spent years scuba diving the sites around Koh Tao. We ensure that your guide is not only guiding your dives safely but that they take the extra time to improve your skills as a diver and share what they know about the local ecosystem – above and below the water.

We tailor your dives to your certification and comfort levels and always guarantee small groups of no more than 4 divers to a dive guide.

We look forward to diving with you.


We offer discounts on fun dives if you’ve taken a course with us, bring your own full set of equipment, or are a certified professional diver in active status.

1,000 THB per dive


Fun Diving Packages

6 Fun Dive Package – 5,400 THB

8 Fun Dive Package – 6,800 THB

10 Fun Dive Package – 8,000 THB


Must be a certified diver with an internationally recognized agency. 

Must be medically fit to dive. 

Haven’t dived in a while? No problem. Book a Scuba Refresher and fun dive with one of our instructors!

More questions? Reach out to us! We’d love to help you and do our level best to respond to all enquiries within 12 hours.

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 diving resort including a hotel, purpose-built training pool, 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.

Reserve your space now

Boat Schedule

Morning boat

7:00 meet up, 7:30 departure from Mae Haad pier. 

We generally out to our deeper and further afield dive sites in the morning. We return around 11:30am 

Afternoon boat

12.00 meet up, 12:30 departure from Mae Haad pier. 

Afternoon dive sites are generally shallower sites closer to the island. We return around 5:30pm. 


You must wait 18 hours after your last dive before flying in an aircraft.

Need a place to stay? We’re a beachfront diving resort! We offer rooms from single-gender to mixed dorms, queen rooms, family rooms, and bungalows for weekly or monthly rent! You can book a room here

Please stay hydrated – drink lots of water before and after your dives.

Bring sunscreen (preferably reef safe!)


No such thing as a stupid question, only the ones not asked!

Yes! We are a 3-star beachfront resort! We have dorm rooms starting at 300 THB and private accommodation starting at 600 THB. Message us and ask about our diving and accommodation packages! 

Yes! You can begin your reading and quizzes before you get here but you’ll need to complete the workshops and exams with your instructor when you arrive. Contact us now to get started! 

Explorer 30 or Advanced 35 are the next courses we recommend after your Open Water 20 Course. These courses will get you to improve your buoyancy, advance your understanding of dive planning, and get you diving on shipwrecks, deep sites, and maybe even diving at night! Get in touch with us to learn more! 

Yes. All the answers are in the manuals for you to review anytime. Our approach to education is for students to comprehend and practice through repetition rather than focusing on textbook memorization. This ensures that your actions–underwater especially–are informed and contextual rather than rote and textbook. 

Yes! Check our Try Dive page or get in touch with us to learn more! We can’t wait to show you the underwater world and teach you to defy gravity!