Where to Dive in Thailand

Thailand has two very different coastlines for diving — the warm Gulf of Thailand and the crystal-clear Andaman Sea. Here's everything you need to choose the right destination for your trip.

Gulf of Thailand vs Andaman Sea

Gulf of Thailand

SeasonMarch – October
Visibility10–25m typical
Water temp27–31°C
Best forLearning, whale sharks
LiveaboardsLess common

Perfect for: First-time divers, budget travellers, and anyone chasing whale sharks or the legendary Sail Rock experience.

Andaman Sea

SeasonNovember – May
Visibility15–40m typical
Water temp26–30°C
Best forManta rays, Similans
LiveaboardsExcellent

Perfect for: Experienced divers seeking pristine visibility, manta rays, and world-class sites like Richelieu Rock and Hin Daeng.

Andaman Sea