Koh Tao is a small volcanic island in the Gulf of Thailand renowned for its pristine coral reefs, crystal-clear waters, and world-class diving opportunities. The island is a premier destination for scuba diving certification courses and recreational diving, attracting enthusiasts from around the world to explore its vibrant marine ecosystems.
Koh Tao offers some of Thailand's best diving experiences with affordable certification courses, abundant marine life, and stunning underwater landscapes that make it essential for divers of all levels.
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Open Water Certification typical cost
Time
3-4 days
Cost
THB8k*–THB12k*
Effort
Moderate
Two-tank dive with guide
Time
Half day
Cost
THB1.5k*–THB3k*
Effort
Moderate
Group tour or individual arrangement
Time
Half day
Cost
THB 400*–THB 800*
Effort
Easy
Shared long-tail boat tours
Time
Half day to Full day
Cost
THB 600*–THB1.5k*
Effort
Easy
Time
2-3 hours
Cost
Free
Effort
Easy
Specialized night diving experience
Time
3 hours
Cost
THB2k*–THB3.5k*
Effort
Moderate
This destination has a temperate climate with temperatures ranging from 27°C to 29°C annually.
Climate averages based on 10-year historical data · Open-Meteo
Pleasant weather, lighter crowds — the sweet spot.
Busiest months — book stays & transport early.
Quietest window with the lowest prices.
From Surat Thani, take a bus or shared minivan to Chumphon Pier (150 km, 3 hours), then board a ferry to Koh Tao (approximately 1.5 to 2 hours). Alternatively, from Bangkok, take a bus to Chumphon and continue via ferry.
