

The SS Undola sits at 43 to 45 metres in New South Wales waters, putting this wreck firmly in technical diving territory where decompression obligations and moderate currents demand solid dive planning. Visibility of 20 to 30 metres rewards that preparation, giving you clean sightlines along the hull and the adjacent wall. The wreck structure harbours conger eels, moray eels, serpent eels and numbrays tucked into the darker recesses, while yellowtail and seapike work the water column above. Seals occasionally pass through, and sunfish have been spotted in the blue. Sea pens colonise the surrounding terrain. April through September offers the most reliable conditions.
-34.17888, 151.09398
Time your dive to hit slack water around the current cycle, as the moderate current here can make working the wreck difficult and burns through your bottom time fast at this depth. Confirm conditions with your charter operator before gearing up, as visibility and current strength can shift considerably between seasons.
The wreck is located 2.5 kilometres off Garie Beach, within the Royal National Park. Access is by boat only. It is noted that charter boats visit the site very rarely, so access is typically via private vessels or dive clubs.
This is a deep dive, suitable only for experienced and properly equipped divers, carrying a risk of decompression sickness. Strong currents can be a significant hazard and have been known to be powerful enough to force dives to be cancelled.
Depth
43-45m
Visibility
5-30m
Skill Level
Advanced
Entry
Boat
Boat required
Water Temp
16-25°C
Current
Moderate
Typical Dive
40 min
Best Time
Apr, May, Jun, Jul, Aug, Sep
The SS Undola wreck sits at a depth of 43 to 45 metres off the coast of Sydney, New South Wales. This depth classification makes it a deep diving site requiring decompression stops and advanced planning. The wreck rests on the seabed with visibility typically ranging from 20 to 30 metres.
Diving the SS Undola requires both Advanced Open Water and Deep Diver certifications due to its depth of 43 to 45 metres. The site demands decompression diving skills and experience managing moderate currents at depth. This is not suitable for recreational Open Water certified divers.
The SS Undola hosts diverse marine life including conger eels, moray eels, and yellowtail that shelter within the wreck structure. Divers regularly encounter seapike, numbrays, and sea pens, with occasional sightings of sunfish and seals. The wreck's depth and location create a habitat for both resident and pelagic species.
The optimal diving season for the SS Undola runs from April through September during Australia's cooler months. Water temperatures during this period range from 16 to 25 degrees Celsius, with the best visibility conditions typically occurring in these months. The winter period offers the most stable weather patterns for accessing this offshore wreck.
The SS Undola is accessible only by boat from Sydney, with no shore access available. Charter boats depart from Sydney Harbour and require advance booking for this offshore wreck dive. There are no facilities at the dive site itself, so all equipment and provisions must be brought aboard.
The primary hazards at the SS Undola include its deep depth of 43 to 45 metres requiring mandatory decompression stops, moderate currents that can increase gas consumption, and the technical nature of wreck penetration at depth. Divers must carry redundant gas supplies and maintain strict ascent protocols. Nitrogen narcosis is a consideration at this depth, requiring advanced training and experience.
The SS Undola is strictly an advanced dive site and is not suitable for beginner or intermediate divers. The 43 to 45 metre depth requires decompression diving certification, advanced buoyancy skills, and experience managing moderate currents. Only divers with Advanced Open Water and Deep Diver certifications should attempt this challenging wreck dive.
A 5mm wetsuit is recommended for diving at SS Undola in Sydney. Water temperatures range from 16°C to 25°C.
SS Undola in Sydney has depths ranging from 43 metres to 45 metres.
A typical dive at SS Undola in Sydney lasts approximately 40 minutes. Actual dive time depends on depth, air consumption, and conditions.