Koh Tachai - Similan Islands

Koh Tachai Plateau is usually a stop on the way to Richelieu Rock, and it’s a good one. It’s a submerged plateau, mostly hard corals and big boulders, riddled with swim-throughs and channels. We’ve had some incredible luck here with schools of chevron barracuda, thick enough to dim the light, and always a good chance to spot tuna zipping by. If you’re lucky, manta rays cruise through, and the occasional whale shark decides to pay a visit when they're not up north. The currents can get serious, so it’s best for experienced divers.

Location
Similan Islands, Thailand, Southeast Asia
Coordinates
8.000000, 97.800000

Best Time to Dive in Similan Islands

The warmest water temperatures in Similan Islands occur in May, averaging 30.8°C. The coolest conditions are in January at 28.6°C.

Monthly Water Temperatures

  • January: 28.6°C
  • February: 29.0°C
  • March: 29.6°C
  • April: 30.6°C
  • May: 30.8°C
  • June: 29.9°C
  • July: 29.6°C
  • August: 29.3°C
  • September: 29.0°C
  • October: 29.0°C
  • November: 29.2°C
  • December: 28.7°C

Nearby Dive Sites in Similan Islands

Nearest Dive Centres to Koh Tachai

Marine Life in Similan Islands

Home to 183 recorded species including 127 reef fish, 38 hard corals, 9 seagrass & algae, 4 sharks & rays, 2 other, 1 octopus & squid.

Notable Species

Recommended Packing List for Koh Tachai

Based on average water temperature of 29.4°C, currents 7 cm/s.

  • Shorty or Rashguard - warm 29°C water needs minimal exposure protection
  • Mask - essential for every dive
  • Fins
  • BCD - buoyancy compensator
  • Regulator - your most safety-critical piece of gear
  • Dive Computer - tracks depth, time, and NDL
  • Surface Marker Buoy (SMB) - essential for boat pickups
  • Dive Torch - useful for crevices and colour at depth
  • Underwater Camera - capture your diving memories