★★★★★★★★★★5.0 · 54 reviews · 3 days · from $353
Earn your PADI Open Water certification in three days on Koh Tao, with small groups, full equipment, insurance, and underwater photos.

“Les was incredibly patient and caring with our group. I really appreciated that OS offers very small class sizes — it made me feel consistently safe and supported, especially as someone who was quite nervous about diving in the sea for the first time. Les gave everyone in the group all the time they needed to adjust and equalize their ear pressure comfortably. I also loved that he took some snapshots of us during the last dive, so we now have wonderful memories to share back home. I’d absolutely do it again and would recommend OS to anyone without hesitation!”
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