Whale Shark Thailand April – Encounter Guide & Best Sites

Last month of good Andaman dive season. Whale shark sightings still possible; water clarity begins to drop as SW monsoon approaches.

Encounter overview

Diving or snorkelling with whale sharks in Thailand during April is possible, with an encounter probability of approximately 50% 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
• Sail Rock (Koh Tao area)

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 April

Water temperature in Thailand typically ranges 26-30°C. Visibility at Richelieu Rock in April 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 April a good time to visit Thailand for whale shark?

Yes – April is possible for whale sharks in Thailand. Encounter probability is around 50% on a dedicated trip. Best sites include Richelieu Rock, Koh Bon, Sail Rock (Koh Tao area). Check availability at Richelieu Rock as spaces fill quickly in peak months.