Lake Bullen Merri is a volcanic crater lake that drops away sharply from shore, offering wall and drop-off diving in an unusual freshwater environment. Depths run from 3 to 50 metres, putting serious bottom time firmly in deep diving territory. Visibility swings considerably, anywhere from 3 to 20 metres depending on conditions, so pick your timing carefully. The lake is stocked with fish, giving you some wildlife interest on the way down. Currents are variable, and the cold water combined with depth means nitrogen narcosis is a real consideration. This is a solid site for intermediate divers who want to practise wall and deep diving without heading offshore.
-38.23650, 143.11200
Visibility tends to be at its best during the cooler months from autumn through to spring, which conveniently aligns with the recommended dive season. A drysuit or well-insulated wetsuit is worth the effort here as the water gets genuinely cold at depth.
Entry is from the northern side of the lake. Park in one of the car parks located off Sadlers Road and walk to the shore. The shore is composed of shale, so care is needed for entry and exit.
Discarded fishing line is a known entanglement hazard; a dive knife or line cutter is essential. The depth makes this site suitable for technical training, so recreational divers should be mindful of their limits. The water is cold and visibility can be poor.
Depth
3-50m
Visibility
3-20m
Skill Level
Intermediate
Entry
Shore
Water Temp
13°C+
Current
Mild
Best Time
Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
Lake Bullen Merri in Camperdown, Victoria requires divers to hold at minimum an Advanced Open Water certification due to the significant depth and challenging conditions. The lake reaches depths of 50 metres and presents hazards including cold water, low visibility, and potential nitrogen narcosis at depth. This intermediate-level dive site is not suitable for newly certified Open Water divers without additional training and experience.
Lake Bullen Merri offers diving from 3 metres to 50 metres depth, making it one of Victoria's deeper freshwater dive sites. The substantial depth range allows for multi-level diving profiles and technical diving opportunities. Divers should be aware that nitrogen narcosis becomes a consideration at the deeper sections of this Camperdown volcanic crater lake.
Lake Bullen Merri maintains a cold water temperature of 13 degrees Celsius, requiring divers to use appropriate thermal protection such as a 7mm wetsuit or drysuit. The consistently cold temperature is typical of deep volcanic crater lakes in Victoria and remains stable throughout the diving season. Proper exposure protection is essential for safe and comfortable dives at this Camperdown site.
The optimal diving season at Lake Bullen Merri runs from March through October, covering the Australian autumn, winter and spring months. During these eight months, conditions are most stable for diving in this Victorian volcanic lake. The site near Camperdown offers consistent cold water diving opportunities throughout this extended season.
Lake Bullen Merri contains stocked fish species rather than natural marine life, as this is a freshwater volcanic crater lake in inland Victoria. Divers visit this Camperdown site primarily for the geological formations, depth training opportunities, and unique freshwater diving environment rather than abundant aquatic wildlife. The lake's main attractions are its significant depth and unusual volcanic landscape features.
Lake Bullen Merri is accessed entirely from shore, with parking facilities available for divers visiting this Camperdown site. No boat is required to reach the diving areas, making it a convenient freshwater dive destination in Victoria. The shore entry provides direct access to depths ranging from 3 to 50 metres.
Lake Bullen Merri presents multiple hazards including entanglement risks, extreme depth to 50 metres, potential nitrogen narcosis, low visibility as poor as 3 metres, and cold water at 13 degrees Celsius. The combination of these factors makes this Victorian crater lake suitable only for intermediate and advanced divers with proper training. Divers must plan conservatively and carry appropriate safety equipment for deep, cold, low-visibility freshwater conditions at this Camperdown site.
Lake Bullen Merri in Camperdown is best suited for divers with some experience. You should be comfortable with your buoyancy and have logged at least 10 to 20 dives.
Lake Bullen Merri in Camperdown has depths ranging from 3 metres to 50 metres.
