Blue Corner dive site

Nusa Lembongan

Blue Corner Diving

Advanced drift dive, wall dive, steep reef slope and pelagic dive; prior strong-current and drift-diving experience required.

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Depth range
5–40 m
Access
Boat dive from Sanur Harbour to the northwestern tip of Nusa Lembongan; entry is made as a live drop, often with a negative entry when the current is running.
Environment
Advanced Drift Dive, Wall Dive, Steep Reef Slope, Pelagic Dive
Experience level
Advanced

About Blue Corner

Blue Corner lies off the northwestern tip of Nusa Lembongan and is one of Bali’s most demanding drift dives. The site combines a shallow reef top, a steep coral slope and a wall that descends beyond recreational limits. Most dive profiles follow the reef edge around 20–30 m, where strong ocean current creates an exciting, fast-moving dive.

The current attracts schooling fish and large pelagic species, with possible encounters including giant trevally, tuna, barracuda, large rays, reef sharks and seasonal mola mola. Sea turtles, moray eels, lobsters, sea fans and healthy soft and hard corals add interest along the wall and plateau. Conditions vary considerably with tide and upwelling, so the site is reserved for advanced divers with drift and strong-current experience.

Availability notice

Conditions-dependent dive. Operation is subject to tide, current, swell, weather and diver-experience checks; the guide may change or cancel the site for safety.

Site highlights

  • Fast drift along a steep coral slope and wall off northwest Nusa Lembongan.
  • Plateau around 20 m with deeper sections approaching 40 m.
  • Strong pelagic potential, including rays, reef sharks, trevally, tuna and barracuda.
  • Seasonal chance of mola mola during cooler upwelling, especially July–October.
  • Large sea fans, soft corals, table corals and busy reef-fish communities.
  • Clear-water potential, balanced by highly variable tide, current and thermoclines.

Before you dive

Recommended certification

Advanced Open Water or equivalent, with recent drift-diving and strong-current experience; excellent buoyancy, gas-management and SMB skills required.

Local guide recommended

Explore with a local guide familiar with the site and its entry and exit points.

Diving conditions & best time to visit

Water temperature
18–29 °C
Visibility
10–30 m

Strong to very strong, sometimes unpredictable ocean current. Usually conducted as a drift dive; current direction, surface swell and cold thermoclines vary with tide and season.

Best months to dive

July, August, September and October for the best chance of mola mola; the site may be dived year-round when conditions permit.

Cool, nutrient-rich upwelling is most pronounced from July to October. Thermoclines may lower the temperature sharply and improve the chance of mola mola encounters, but sightings remain seasonal and unpredictable. Tide, swell and current determine whether the site can be safely dived on any given day.

Conditions may change

Typical conditions can vary on the day of your dive. Confirm current conditions with the dive team before entering the water.

Marine life & activities

  • Mola mola (ocean sunfish), seen seasonally most often during the cooler July–October upwelling; sightings are never guaranteed.
  • Large rays, including marble rays and occasional eagle rays.
  • Whitetip reef sharks and other reef sharks along deeper sections.
  • Giant trevally, dogtooth tuna, barracuda and schooling jacks in the blue.
  • Sea turtles, moray eels and lobsters around the reef and wall.
  • Sea fans, soft corals, table corals and abundant tropical reef fish.

Access & safety

Entry & Exit

Boat entry at a live-drop point selected for the tide. A negative entry is commonly used when current is running: enter together, descend promptly and regroup at the reef under the guide’s direction.

Boat departure point
Sanur Harbour, Bali
Boat travel time
45–60 min

Safety notes

Powerful and sometimes unpredictable current is the principal hazard. Direction and strength can change with the tide, with potential downcurrent or separation into open water. The steep slope drops beyond 40 m, while cold thermoclines can increase gas consumption. This site is unsuitable for inexperienced divers and should only be attempted with a qualified local guide after a current and weather assessment.

Dive tips

  • Follow the guide’s tide-specific briefing and enter only when the operator confirms conditions are suitable.
  • Be ready for a prompt negative entry and descend with the group; avoid lingering at the surface.
  • Maintain close buddy and guide contact because visibility and current direction can change.
  • Watch depth and no-decompression limits carefully—the slope and wall descend beyond recreational limits.
  • Carry a deployable surface marker buoy and reel, and know how to use them in current.
  • Use adequate thermal protection for cold thermoclines, especially from July to October.
  • Never chase mola mola, sharks or rays; maintain neutral buoyancy and allow wildlife to approach.

Underwater photography

Wide-angle equipment suits the wall, reef scenery, schooling fish and large pelagics. Keep the camera rig compact and secured in strong current, prepare settings before entry, use a fast shutter speed for moving subjects and keep photography secondary to depth, gas, buoyancy and team awareness. Do not chase or crowd mola mola, rays, sharks or turtles.

Site map & location

Site coordinates
-8.66128, 115.44247
Open in Google Maps
Schematic dive site map of Blue Corner, Nusa Lembongan, showing the reef top, 20-metre plateau, wall, current direction and typical 20–30-metre dive profile.

Bali Diving

One of Southeast Asia's top dive destinations.

Bali is internationally recognised for its rich marine biodiversity and variety of dive environments. From coral reefs to wrecks and unique underwater landscapes, the island attracts divers from around the world looking for memorable and diverse diving experiences.

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