HMS DIOMEDE - Trincomalee & East Coast

The HMS Diomede is a classic Trinco dive, one we always return to. She went down in 1795 after striking an uncharted rock near Pigeon Island, and now rests upright in Back Bay. Dropping onto her, you’re met with a real sense of history, the old wooden hull, though largely collapsed, still hinting at her former glory. We love picking through the debris, spotting the occasional cannon or an old pottery shard embedded in the sand. There’s a beautiful soft coral growth across the timbers, bright orange and purple, which attracts a constant stream of glassfish and schools of fusiliers. Keep an eye out for moray eels tucked into the darker crevices – a big fimbriated moray is often seen lurking. For photographers, the ambient light filtering through the clear water creates some dramatic shadows, especially in the late morning. It’s a gentle dive, maxing out at 22 metres, making it perfect for newer wreck divers or those who just want a relaxed exploration. We'd suggest getting there early to beat any potential boat traffic, as it can get a little busy.

Location
Trincomalee & East Coast, Sri Lanka, Indian Ocean & East Africa
Coordinates
8.600166, 81.243500
Type
wreck
Maximum Depth
22m

Marine Protected Area: Little Sober Island

Best Time to Dive in Trincomalee & East Coast

The warmest water temperatures in Trincomalee & East Coast occur in January, averaging 27.4°C. The coolest conditions are in December at 27.4°C.

Monthly Water Temperatures

  • January: 27.4°C (air: 25.8°C)
  • February: 27.4°C (air: 26.3°C)
  • March: 27.4°C (air: 27.3°C)
  • April: 27.4°C (air: 28.2°C)
  • May: 27.4°C (air: 28.9°C)
  • June: 27.4°C (air: 29.6°C)
  • July: 27.4°C (air: 29.4°C)
  • August: 27.4°C (air: 28.9°C)
  • September: 27.4°C (air: 28.7°C)
  • October: 27.4°C (air: 27.2°C)
  • November: 27.4°C (air: 26.0°C)
  • December: 27.4°C (air: 25.9°C)

Nearby Dive Sites in Trincomalee & East Coast

Nearest Dive Centres to HMS DIOMEDE

Marine Life in Trincomalee & East Coast

Home to 259 recorded species including 205 reef fish, 16 hard corals, 14 sea snails & nudibranchs, 7 sharks & rays, 6 seagrass & algae, 5 whales & dolphins.

Notable Species

Recommended Packing List for HMS DIOMEDE

Based on average water temperature of 27.4°C.

  • Shorty or Rashguard - warm 27°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

How deep is the HMS Diomede wreck dive site in Trincomalee?
The HMS Diomede wreck dive site in Trincomalee is located at a depth of 22 meters. This makes it an accessible wreck for divers with appropriate training and experience.
What kind of marine life and historical artifacts can divers expect to see on the HMS Diomede wreck?
The provided data context for the HMS Diomede wreck does not specify the types of marine life or historical artifacts divers can expect to see. However, as a sailing vessel sunk in 1795, it is a significant historical wreck measuring 42.7m x 11.6m. Divers interested in marine life in Sri Lanka can explore the DivePlnr wildlife database for general information.
What is the difficulty level for diving the HMS Diomede wreck, considering its depth and conditions?
Diving the HMS Diomede wreck is classified as an intermediate difficulty dive. With a depth of 22 meters, it requires divers to have a suitable certification and experience for wreck diving at this depth.
When is the best time of year to dive the HMS Diomede wreck for optimal visibility and sea conditions?
The provided data context for the HMS Diomede wreck does not specify the best time of year for optimal visibility and sea conditions. For general information on diving seasons in Sri Lanka, you might consult DivePlnr's when-to-dive guide.
What scuba diving certifications are typically required to dive the HMS Diomede wreck?
While specific certifications are not listed in the provided data, the HMS Diomede wreck is an intermediate dive at 22 meters. Typically, an Advanced Open Water Diver certification or equivalent, along with wreck diving specialty training, would be recommended for such a site. Always check with local dive operators in Trincomalee for their specific requirements.
What are the typical underwater currents and visibility conditions at the HMS Diomede dive site?
The provided data context for the HMS Diomede dive site does not include information on typical underwater currents or visibility conditions. Divers planning to visit this Sri Lanka wreck should inquire with local dive centers for current conditions.