Whale Shark Thailand March – Encounter Guide & Best Sites

Whale shark probability at its highest around Richelieu Rock and Koh Bon. Liveaboard is the recommended format.

Encounter overview

Diving or snorkelling with whale sharks in Thailand during March is good season, with an encounter probability of approximately 55% under normal conditions. The whale shark is the largest fish on Earth – a slow, filter-feeding giant that inspires awe the moment its spotted flanks emerge from the blue.

Best sites

• Richelieu Rock
• Koh Bon
• Koh Tachai

What to expect

Whale sharks feed near the surface, often aggregating at plankton blooms. They are completely harmless to divers and will continue feeding even when swimmers are present.

Water conditions in March

Water temperature in Thailand typically ranges 26-30°C. Visibility at Richelieu Rock in March is generally good; check local liveaboard or dive operator reports the week of your trip for specific conditions. Pinnacles, liveaboard similan islands is the primary dive style in Thailand.

Practical tips

Snorkelling is often preferred over scuba – bubbles can startle the sharks. Keep a 3 m distance from the body, 4 m from the tail. Early morning encounters are usually calmer.

Getting there

Fly into Bangkok (BKK) or Phuket (HKT). Similan islands, koh tao, whale sharks, leopard sharks, richelieu rock. 30-day visa exemption for many nationalities. Currency: Thai Baht (THB).

Is March a good time to visit Thailand for whale shark?

Yes – March is good season for whale sharks in Thailand. Encounter probability is around 55% on a dedicated trip. Best sites include Richelieu Rock, Koh Bon, Koh Tachai. Check availability at Richelieu Rock as spaces fill quickly in peak months.