Koh Tao Diving, Done Right
Small groups, our own private boat, and new gear — not a 20-person cattle dive on a shared boat. This is how diving on Koh Tao is supposed to feel.
The dives you came to Koh Tao for
We pick dive sites daily based on the weather ⛅, where visibility is best, and where the gentle giant was last spotted - Koh Tao's whale sharks.
Sail Rock
The best dive in the Gulf. A 6m chimney swim-through, huge schools, and whale sharks in season. Full-day trip on our boat.
Chumphon Pinnacle
Koh Tao's big-fish site. Whale shark sightings in season, schools of barracuda and batfish year-round.
Twins
Two pinnacles on a sandy bottom, easy 12-18m. Great for buoyancy work and macro spotting.
Shark Island
Wall dive on the south side. Reef sharks, turtles and anemones — usually a relaxed second dive.
Why Divers Choose Siam 🤿
Small groups, max 4 per instructor
Real attention and real safety. You're a diver, not a number on a packed boat.
Our own private boat + new gear
We don't share boats with other shops. Modern, well-maintained equipment, and the schedule actually runs on time.
PADI 5-Star Center
Top PADI standards on Koh Tao, with a fraction of the crowd of the big factory shops.
4.9 Google · 5.0 TripAdvisor
One of the most-reviewed dive shops on the island. Read why divers keep coming back.
Instructors in EN / ES / HE
Brief, dive, and debrief in your own language — English, Spanish or Hebrew.
Easy booking on WhatsApp
Message us, pick your day, and a small deposit secures your spot. We reply within minutes.
Pricing
Includes
- ✓Guided dives with a pro dive guide
- ✓All gear (BCD, regulator, mask, fins, wetsuit) — new and well-maintained
- ✓Full air tank (180-200 bar), tanks and weights
- ✓Fresh fruit and drinks on our private boat
- ✓Dive insurance
- ✓Sail Rock full-day: breakfast and lunch included
Not included
- ·Hotel pickup
- ·GoPro rental
- ·Underwater photos (add-on)
4.9 on Google (845) · 5.0 on TripAdvisor (776).
See what divers say after diving Koh Tao the Siam Scuba way.
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
Dive Koh Tao the way it should be
Pick your day and reserve your spot with a small deposit. We confirm the same day.
Frequently asked
Koh Tao diving, done right.
Small groups, private boat. Reserve your dive with a small deposit - WhatsApp us your dates.
Book your dive