JUMBO JOIST - Trincomalee & East Coast

Jumbo Joist is a proper wreck dive, our pick for Trincomalee if you're into something a bit more substantial than a reef. This old motor vessel went down in '84, and she's settled upright on a sandy bottom at 20 metres. You can really get a feel for her scale as you descend, the 80-metre length stretching out below you. We love exploring her holds, especially the number one and two where she took on water. There's a tangible sense of history down there, a quiet hum in the water as you glide through the darker sections. On the superstructure, schools of fusiliers are usually so thick they almost block out the light. Look closely and you'll often spot scorpionfish camouflaged on the plating, and groupers have claimed the deeper nooks as their territory. Visibility here can be excellent, making the whole wreck accessible to divers comfortable with penetration and deeper dives. It’s an easy-going wreck, no strong currents to worry about, just a grand old lady waiting to be explored.

Location: Trincomalee & East Coast, Sri Lanka, Indian Ocean & East Africa
Coordinates: 7.333334, 81.883330
Type: wreck
Maximum Depth: 20m

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)

Nearest Dive Centres to JUMBO JOIST

Coco Diving Trincomalee - ["PADI"]
Dive For You - ["PADI"]
Epic Ocean Adventures - ["PADI"]
International Diving School Trincomalee - ["PADI"]
Poseidon Diving Centre - ["PADI"]
Sri Lanka Dive School

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

Giant trevally (Caranx ignobilis) - Reef Fish
Big-eye trevally (Caranx sexfasciatus) - Reef Fish
Golden trevally (Gnathanodon speciosus) - Reef Fish
cloth-of-gold cone snail (Conus textile) - Sea Snails & Nudibranchs
Jack (Selar crumenophthalmus) - Reef Fish
Silver Sillago (Sillago sihama) - Reef Fish
Red lionfish (Pterois miles) - Reef Fish
Species code: Ea (Enhalus acoroides) - Seagrass & Algae
Bicolor Blenny (Ecsenius bicolor) - Reef Fish
Wrasse (Stethojulis interrupta) - Reef Fish
Small-eyed Squirrelfish (Myripristis murdjan) - Reef Fish
Necklace Cone (Conus monile) - Sea Snails & Nudibranchs
Manini (Acanthurus triostegus) - Reef Fish
Spangled emperor (Lethrinus nebulosus) - Reef Fish
Blue-lined Surgeonfish (Acanthurus lineatus) - Reef Fish
Redcoat (Sargocentron rubrum) - Reef Fish
Five-lined snapper (Lutjanus quinquelineatus) - Reef Fish
Herring Scad (Alepes vari) - Reef Fish
Dusky Wrasse (Halichoeres marginatus) - Reef Fish
Blue and Gold Fusilier (Caesio caerulaurea) - Reef Fish

Recommended Packing List for JUMBO JOIST

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