Diving in Thailand: 73 Sites, Warm Water & Where Beginners Start

Thailand has 73 published dive sites spread across the Gulf of Thailand and Andaman Sea, with water temperatures holding between 26 °C and 30 °C every month of the year. That warmth, combined with sites that start at 5 metres depth, makes it one of the most practical places in the world to learn to dive. Beginners have real options here — not just shallow pools, but actual reef dives with marine life.

Best dive sites in Thailand

• The Elephants — A dedicated beginner site with gentle conditions, good for first open-water dives.
• Suthep Bay — Another beginner-rated site, sheltered enough to build confidence without current.
• หินใบ (Hin Bai / local name) — Beginner-rated; a good stepping stone before attempting the more exposed Sail Rock nearby.
• Big Blue — Beginner-friendly, calm entry, suitable for newly certified divers.
• Ko Dok Mai — A wall and reef site accessible to those who have completed their open-water course, with good visibility typical of Andaman sites.
• Raya — Popular day-trip reef, manageable depths for early divers.
• Sail Rock (Hin Bai) — Intermediate, 5–40 m, worth targeting once you have a few dives logged; a chimney swim-through and strong pelagic sightings.
• Anemone Reef (Phuket) — Intermediate, 5–24 m, dense anemone fields and regular reef shark activity.
• Chumpon Pinnacle — Intermediate, reaches 20 m; known for schooling fish and whale shark encounters.
• Hin Daeng / Hin Muang — Advanced, 12–50 m; among Thailand's deepest and most current-swept sites, not for beginners.

When is the best time to dive in Thailand

Thailand is genuinely diveable year-round, with water temperature never dropping below 26 °C. The Andaman coast (Phuket, Krabi) runs best November through April when seas are calm. The Gulf of Thailand side (Koh Tao, Chumpon) peaks May through October. Splitting a trip across both coasts lets you chase good conditions in any season.

Is Thailand good for beginners

Yes. Several sites — The Elephants, Suthep Bay, Big Blue, and หินใบ — are specifically rated for beginner divers. Koh Tao in particular has built an entire industry around entry-level certification, with dozens of dive schools and shallow training reefs. The warm water means no drysuit or thick wetsuit to wrestle with, which removes a significant skill barrier.

What you'll see

Thailand's recorded marine life includes whale sharks — most reliably spotted at Chumpon Pinnacle and Sail Rock during plankton-rich months — and blacktip reef sharks, which appear regularly at intermediate and advanced sites like Anemone Reef. Reef fish, anemones, and hard coral are consistent across most sites.

FAQ

Do I need a certification to dive in Thailand? For most reef sites, yes. A PADI Open Water or equivalent is the minimum. Some operators offer supervised discover scuba dives at beginner sites without prior certification.

What depth do beginner sites reach in Thailand? Beginner-rated sites typically stay within 12 metres, well inside the open-water certification limit of 18 metres.

Can I see whale sharks as a beginner? Whale sharks appear at Chumpon Pinnacle and Sail Rock, both rated intermediate. You'd need a few dives of experience before most operators take you there.

Is visibility good for beginners learning to navigate? Sail Rock records 5–40 m visibility depending on conditions. Beginner sites vary, but 10–15 m is common in calm seasons — enough to see your buddy and the reef clearly.

Thailand dive map