Best Diving & Snorkeling in Koh Samui

The Gulf's most famous dive school on Koh Tao — thousands of certifications a year and standards to match.

Samui's top-reviewed dive center — small groups to Sail Rock and Chumphon Pinnacle.

Named for the Gulf's best dive site and built around it — Sail Rock day trips done right.

Personal-scale Koh Tao diving — patient pros and the island's turtle-rich shallow sites.

Samui-based PADI courses and Gulf trips — polished boats and a strong teaching reputation.

Long-running Samui operator covering Sail Rock, Koh Tao, and Ang Thong's dive sites.

A PADI five-star IDC center — from bubble-maker to instructor development under one roof.

Small, unhurried, and aptly named — relaxed guided diving for certified divers and returners.