La Bombona Diving Koh Tao Open Water Course

La Bombona’s Open Water course runs across 3 days at a dive school right on the beach at Grand Beach Resort — reception doubles as the meeting point, with no separate commute between the classroom, pool, and gear room. Instruction covers theory videos, a full safety briefing, and one pool session before the group moves to open water for four dives on Koh Tao reefs. Difficulty is rated moderate on the course scale — accessible for first-time divers, though the pool session exists specifically to build underwater comfort before the open-water dives that follow.

Groups stay small: a maximum 4-to-1 student ratio, so no one waits around while an instructor works through a queue of first-timers. Gear is fitted to your measurements at check-in, and every diver keeps the t-shirt that comes with the course. The dive boat itself has showers and a sun deck, and a restroom on board plus insurance are both included for the certification dives.

Instruction runs in English and Spanish, worth checking at sign-up if a mixed group is booking together. The course certifies through PADI, valid internationally once complete. At 5.0 from 173 reviews, the format keeps things simple: theory and pool work first, open water once the group is comfortable, with a full refund available up to 24 hours before the start date.

Insider Tip: With a 4:1 student cap, morning sign-up slots fill first — book a few days ahead if 3 days is a hard limit on the trip.

Watch out: Only English and Spanish instruction is offered here — confirm ahead if a different teaching language is needed for anyone in the group.