You're already certified. Pick your day, pick your sites — Chumphon Pinnacle, Sail Rock, Twins, Shark Island. We handle the boat, the gear, the guide.
We don't share with other shops. Boat fills with our divers, leaves on time.
Real briefings, real attention to your air consumption. No herd diving.
Pick the half-day that fits your schedule. Sail Rock day-trips run weekly.
Most repeat customers we've ever had. They keep coming back, you'll see why.
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
We rotate sites based on weather and visibility. Some of our regular sites:
Big-fish site. Whale shark sightings in season, schools of barracuda, batfish year-round.
Best dive in the Gulf. 6m chimney swim-through, big schools, sometimes whale sharks. Full-day trip.
Two pinnacles, sandy bottom, easy 12-18m. Great for buoyancy work and macro spotting.
Wall dive on the south side. Reef sharks, turtles, anemones — usually our second dive.
Quieter site, great viz on flat days. Best for photographers.
Book online or send dates on WhatsApp — we'll confirm the same day.
Tap below to book — or WhatsApp us your preferred dates.
Book a fun dive