HMS Stygian - Similan Islands

The HMS Royal George isn't just a hunk of metal on the seabed, it’s a portal. This 1756 first-rate ship of the line, lost in a tragic capsizing, now lies broken but majestic in the cool Cornwall waters. We love how the sheer scale of it hits you – huge timbers, cannons, and ballast scattered across the silty bottom. It’s dark down there, even on a sunny day, but your torch beam reveals the skeletal remains of what was once a formidable vessel. Navigation can be tricky; the wreck is fragmented, so buddy teams need to stay sharp, but it’s worth the effort. Congers poke their heads from collapsed sections, their eyes reflecting your light. Bull rout and common gobies dart between the barnacle-encrusted timbers. Look closely among the bladder wrack and eelgrass; we've spotted Alder's Necklace Shells and masked crabs tucked away. This is a dive for those who appreciate history as much as marine life, a deep, sometimes challenging, but incredibly rewarding journey into the past.

Location
Similan Islands, Thailand, Southeast Asia
Coordinates
5.700000, 98.950000
Type
wreck

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 HMS Stygian

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 HMS Stygian

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