Theory in the morning, pool in the afternoon, four real ocean dives over the next two days. You leave with a card you can dive on anywhere in the world, forever.
More water time, more skills practice, less waiting around.
We start new courses every day, so you don't have to plan your trip around our schedule.
Recognized at every dive shop on Earth. Yours forever, no renewals.
778 reviews and counting. Read what graduates say about their certification week.
Based on 776+ verified reviews on Tripadvisor
"There are so many dive schools in Koh Tao and this one is definitely the best. The friendliest instructor ever — best day of our trip!"
Sarah M.
🇬🇧 United Kingdom · March 2026
"Our instructors Chris and Noah were incredible — kind, helpful, funny and patient. We owe a huge thanks to Siam Scuba, easily one of the nicest dive shops in Koh Tao."
The Johnson Family
🇺🇸 United States · February 2026
"Fantastic experience. The staff were incredibly kind and welcoming. Small group meant I got tons of personal attention. Certified in 4 days and already planning my next dive."
Lucas R.
🇩🇪 Germany · January 2026
Day 1 is theory and pool. Days 2-3 are four real ocean dives. You can finish in 3 if you start eLearning before you arrive.
Send your travel dates on WhatsApp and we'll find a start day that fits.
WhatsApp us your dates — we'll start your course this week.
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