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
- 8 mile rock
- Andaman Scuba
- Anemone Reef (reef)
- Anita s reef - 5-20m (reef)
- Anita's Reef - 10-25m (reef)
- Anti gravity Divers
- Ao Kon Ka Re
- Ao Nui - 17m
- Ao Sane - 5-18m (reef)
- Ayara Bay - 17m (reef)
- Banana Bay - 5-20m (reef)
- Barracuda Rock - 20m (pinnacle)
- Batfish Bend - 10-28m (drift)
- Bay 1 / Ao Ter (reef)
- Beacon Beach
Nearest Dive Centres to Premchai Wreck
- ABC Phuket Diving
- Activity and diving centre
- Adang Sea Divers - SSI
- All 4 Dive - PADI
- All4Diving® Phuket - ["PADI"]
- Amazing Phuket adventures - SSI
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
- Whale Shark (Rhincodon typus) - Sharks & Rays
- Staghorn coral (Acropora kosurini) - Hard Corals
- sorrah shark (Carcharhinus sorrah) - Sharks & Rays
- Staghorn coral (Acropora indonesia) - Hard Corals
- seagrass (Halophila ovalis) - Seagrass & Algae
- Dusky Parrotfish (Scarus niger) - Reef Fish
- Bicolor Blenny (Ecsenius bicolor) - Reef Fish
- Moluccan cardinalfish (Ostorhinchus moluccensis) - Reef Fish
- Staghorn coral (Acropora secale) - Hard Corals
- Staghorn coral (Acropora valida) - Hard Corals
- Staghorn coral (Acropora hoeksemai) - Hard Corals
- cymodocea (Cymodocea rotundata) - Seagrass & Algae
- Herringbone butterflyfish (Chaetodon triangulum) - Reef Fish
- Dollfus's octopus (Amphioctopus aegina) - Octopus & Squid
- Clown Tang (Naso lituratus) - Reef Fish
- Staghorn coral (Acropora solitaryensis) - Hard Corals
- Species code: Ea (Enhalus acoroides) - Seagrass & Algae
- Blue-scaled wrasse (Cirrhilabrus cyanopleura) - Reef Fish
- Argus Grouper (Cephalopholis argus) - Reef Fish
- Staghorn coral (Acropora austera) - Hard Corals
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