Premchai Wreck - Similan Islands

The Premchai Wreck is one of those sites we always make time for on the way back to Tap Lamu. It’s not the deepest wreck out there, topping out around 20 metres, but it offers a solid intermediate dive. This old tin dredger, which went down in 2001, lies mostly upside down, and that unique orientation gives it a real character. We love poking around the darker spaces. You'll spend your dive exploring the hull, now encrusted with hard corals and big clams. We’ve spotted honeycomb morays tucked away in crevices, their patterns distinct against the metal. It’s a site that feels lived in, too; schools of fusiliers often mill above the deck, shimmering in the shafting light. The Premchai is a perfect dive for those who appreciate the history of a wreck, combined with a good chance of finding some interesting macro life without pushing deep limits. It’s a rewarding dive, especially as a last hurrah before heading back to shore.

Location
Similan Islands, Thailand, Southeast Asia
Coordinates
8.454400, 98.186700
Type
wreck
Maximum Depth
20m
Difficulty
Intermediate

Marine Protected Area: Khao Lampi- Hat Thai Mueang

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 Premchai Wreck

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 Premchai Wreck

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

Frequently Asked Questions

What is the maximum depth of the Premchai Wreck dive site?
The Premchai Wreck dive site ranges in depth from 10 to 22 meters. Divers can explore various sections of this fascinating wreck within this depth range, which lies pretty much upside down.
What kind of marine life and underwater features can divers expect to see at the Premchai Wreck?
Divers at the Premchai Wreck can expect to see a vibrant array of marine life and features. The wreck is covered in clams and hard corals, with a smaller number of soft corals also making their home on the keel. Keep an eye out in the nooks and crannies for different types of moray eels, such as the relatively rare honeycomb moray eel, which can be found among the wreck's structure.
How challenging is diving the Premchai Wreck, and is it suitable for beginner divers?
Diving the Premchai Wreck is considered to be of Intermediate difficulty. Due to its depth and characteristics as a wreck dive, it is generally not recommended for beginner divers. Divers should possess appropriate experience and certifications for intermediate-level dives.
What is the best time of year to dive the Premchai Wreck for optimal conditions and visibility?
The provided data does not specify the best time of year to dive the Premchai Wreck for optimal conditions and visibility. For general information on diving seasons in the region, you might consult our When to Dive guide. We recommend checking with local dive operators for current seasonal advice.
What scuba diving certifications are required or recommended for diving the Premchai Wreck?
Given that the Premchai Wreck is rated as Intermediate difficulty, divers should possess certifications appropriate for such dives. This typically includes advanced open water certification or equivalent experience. It is always recommended to check with your dive operator for specific requirements before planning your dive.
What are the typical current and visibility conditions experienced at the Premchai Wreck dive site?
The provided data does not include specific information regarding the typical current and visibility conditions experienced at the Premchai Wreck dive site. Divers should consult local dive operators in the Similan Islands for the most up-to-date conditions before planning their dive. This will ensure you have the latest information for a safe and enjoyable experience.