Open Water diver exploring coral reef underwater on scuba, making a hand signal with vibrant marine life in the background.

Earn Your Open Water Diver Course in Koh Tao

SSI Open Water Diver

Learn to scuba dive in Koh Tao with the SSI Open Water Diver Course. In just 2.5 days, you’ll train with expert instructors, complete four ocean dives, and earn your certification to dive worldwide up to 18m.

Level

Beginner

Course

Duration

2.5

Days

Max Depth

18

Meters

Cost

฿11,000

Thai Baht

The Learning Experience

Embark on your scuba journey with the Open Water Diver Course in Koh Tao. Over 2.5 days, you’ll combine interactive classroom learning, hands-on shallow water practice, and four incredible open water dives around the island.

Guided by experienced SSI instructors, you’ll master essential dive skills, gain confidence underwater, and discover the vibrant coral reefs and marine life that make Koh Tao world-famous. By the end of the course, you’ll earn your SSI Open Water Diver certification, allowing you to dive anywhere in the world up to 18 meters.

Ready to start your adventure?

What’s included

What to bring

Prerequisites

Itinerary

8:00-12:00 Orientation & Academic session

12:00-12:30 Break

12:30-17:00 2 Open Water Dives

17:00-17:30 Debrief

09:00-10:30 Academic session 4-6

10:30-11:00 Dive planning

11:00-11:30 Exam and mask fitting workshop

11:30-12:15 Break

12:30-17:00 2 Open water dives

17:00-17:30 Debrief

07:30-12:00 2 Open water dives

12:00-12:30 Certification and celebration :)

Take the Next Step: SSI Advanced Adventurer Course

The SSI Advanced Adventurer Course is the perfect follow-up to your Open Water certification. Designed to enhance your confidence and abilities, this course introduces you to five different types of dives, including deep diving and underwater navigation.

In just two days, you’ll gain the skills to dive deeper (up to 30 meters) and explore more advanced dive sites around Koh Tao and beyond. Whether you’re interested in night dives, wreck exploration, or perfecting your buoyancy, this course is your gateway to becoming a more skilled and adventurous diver.

SSI Open Water Diver

Learn to scuba dive in Koh Tao with the SSI Open Water Diver Course. In just 2.5 days, you’ll train with expert instructors, complete four ocean dives, and earn your certification to dive worldwide up to 18m.

All activities start the day after arrival on the island.

฿11,000

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

Juliette L.
9 June 2026

Amazing day ! Diving for the first time, all the crew were amazing, thank you to Carmen out instructor for her patience and thank you to Viny, Fabio, Anna and the captain for organizing that super day

Mitch H.
9 June 2026

Great dive company. Did two fun dives and it was good. Had Ben as the dive master/guide and she was great. Thanks!

Zachary D.
8 June 2026

Had a great time diving with Ben at White Rock and Twins after helping the Goodtimes team do beach clean up! Ben was a great dive master and helped us identify a lot of cool fish and made it a super fun experience. Also huge shout out to Mike for joining our dive today and doing an awesome photo shoot for us!

Sophia C.
8 June 2026

My partner and I completed two fun dives with Goodtimes and had an amazing time! Our dive master, Ben, did a great job and made sure we had so much fun. Additionally, we also had Mike take photos of us and it was so much fun! Everyone was so friendly and we absolutely loved the vibes. We also joined the group clean-up earlier which was nice as it was sad to see so much trash around the beautiful island. We really enjoyed our day with Goodtimes and had so much more fun on the dives compared to our open water cert that we did with another shop. If you are thinking about diving here or getting a cert, I would recommend! If we had more time on Koh Tao we would come back.

Matthew C.
8 June 2026

Just Dive with Good Time 🤙 We did our Open Water with them. Such a lovely group of people that work here, especially our Instructor Lydia! She is so so good at what she does, she has a great way of teaching, really methodical in showing and explaining everything we needed to know to be safe divers. Lydia was patient too, and really made me feel at ease as someone who has a long-standing fear of drowning! If you’re in any way unsure of whether it’s for you, just talk to this crew and they’ll put your mind at ease and you absolutely won’t regret it! Owners are super sound and have created a lovely little community around it. Food is immense there too in their restaurant, lamb burger was outrageous. They often host international DJs, or an open decks sessions on a Sunday, so you can spend morning, afternoon and night perched there.

Barry R.
7 June 2026

I recently did a refresher dive here after not having dived for several years. The instructors were friendly, patient and extremely knowledgeable. Highly recommend.

Frequently Asked Questions

Frequently asked questions about Scuba Diving in Koh Tao

Scuba Diving in Koh Tao has been very popular for years, we have some of Thailand’s best dive sites and great diving conditions all year round. Our most popular course is the SSI Open Water Diver course which takes 2.5 days to complete and allows to to dive all over the world once you are certified. This course is ideal for beginners who want to get Scuba certified on Koh Tao.

If you are short on time the SSI Basic Diver is for you! This is a half-day experience where you can dip your toes in and explore the underwater world.

You can earn an Open Water Diver certification with any major dive organization. An SSI diver can dive at PADI centers worldwide, and vice versa.

However, with SSI you do get benefits:

Online Learning
While most organisations offer online learning, not all of them offer it free of charge and can end up racking up quite the bill. SSI offers your learning materials for free as part of your course registration and is easy to navigate using the MySSI app. The app is regularly updated and also offers additional free courses like the ‘Try Diving’ and the ‘Blue Oceans‘ for you to enhance your scuba diving knowledge.

Recognition Ratings
SSI do things a little differently to other diving agencies, they continue to recognise your advancement in diving whether you are enrolled in a course or not. When you reach certain milestones you will be awarded recognition status. This is why we encourage specialities over the SSI Advanced Open Water or PADI Advanced Open Water courses. With SSI once you complete 4 speciality courses and 24 dives you will automatically be rewarded with Advanced Open Water recognition status. Taking this route allows you to explore your passions underwater without being restricted to one exploration dive per specialty! Don’t forget we offer discounts on bundles too!

Flexibility
SSI allows its professionals to teach using an 80/20 approach. Instructors can adapt 20% of the course to match each student’s learning pace.

The minimum age to learn to scuba dive and become certified is ten years old. If the diver is between 10-14 they will be awarded with a Junior SSI Open Water Certification that will automatically upgrade to Open Water Diver once they turn 15.

However, the SSI Explorers program provides options for children aged six and up to experience diving and snorkeling in very shallow water.

Diving in Koh Tao is popular for its year-round diving conditions, boasting clear waters, vibrant marine life, and stunning dive sites available 365 days a year. Whether you’re a beginner starting with an SSI Open Water Diver course or an experienced diver, diving in Koh Tao offers it all—excellent training sites, famous dive spots, shipwrecks, and pinnacles like Sail Rock. With some of the world’s most affordable and accessible diving packages, Koh Tao remains a must-visit destination for underwater enthusiasts across Southeast Asia.

At Goodtime, we make your Koh Tao experience even more affordable with our exclusive discounts. Get 25% off accommodation, with rates starting at just 1,150 Baht for private double or twin rooms and 500 Baht per night in our 4-bed dorms. Enjoy 20% off delicious meals at our beachfront restaurant, perfect for refueling after your adventures. Plus, save 10% when you book any scuba diving or rock climbing bundle—making it easier than ever to dive, climb, and relax on Koh Tao!

SSI do things a little differently to other diving agencies, they continue to recognise your advancement in diving whether you are enrolled in a course or not. When you reach certain milestones you will be awarded recognition status. This is why we encourage specialities over the SSI Advanced Open Water or PADI Advanced Open Water courses. With SSI once you complete 4 speciality courses and 24 dives you will automatically be rewarded with Advanced Open Water recognition status. Taking this route allows you to explore your passions underwater without being restricted to one exploration dive per specialty! Don’t forget we offer discounts on bundles too!

Yes, a basic level of in-water ability is required to scuba dive. For certain courses, you’ll need to complete a water fitness evaluation before heading into the open water. This includes either a 200-meter unaided swim or a 300-meter swim using a mask, snorkel, and fins. These requirements ensure your safety and confidence during your underwater adventures.