

Duffield Ridge is a boat-access reef and cave dive in Western Australia that rewards advanced divers willing to work with its conditions. Depths run from 17 to 30 metres, and moderate current is the norm here, with thermoclines adding an extra variable to manage. Visibility sits between 5 and 10 metres, so navigation demands attention. The caves attract resting nurse sharks and Port Jackson sharks, while Western blue devils and Australian giant cuttlefish hold territory around the reef structure. Keep an eye on the sand and rock faces for nudibranchs and western rock lobsters. Samson fish and buffalo bream move through in the water column.
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June and August are the pick of months when conditions tend to favour this site, so plan accordingly. Come prepared for a thermocline drop in the deeper sections and confirm current direction with your skipper before descending.
Access info coming soon
Boat entry here means you'll be dropped directly into deeper water. Watch for strong currents and a sudden drop in temperature as you descend. Stay close to your buddy and ascend slowly if you feel disoriented.
Depth
17-30m
Visibility
5-10m
Skill Level
Advanced
Entry
Boat
Boat required
Water Temp
27-29°C
Current
Moderate
Best Time
Jun, Aug
Yes, Duffield Ridge in Queensland is a boat-access-only dive site. You will need to book with a local dive operator or charter a boat to reach it.
Duffield Ridge in Queensland requires advanced diving skills. Expect deeper depths, currents, or challenging conditions that are not suitable for newly certified divers.
Diving at Duffield Ridge in Queensland requires the following certifications: Advanced. Always dive within your training limits.
A rashguard or 2mm shorty is recommended for diving at Duffield Ridge in Queensland. Water temperatures range from 27°C to 29°C.
Duffield Ridge in Queensland is home to Nurse Shark, Buffalo Bream, Samson Fish, Port Jackson Shark, Western Blue Devil, and Nudibranch. Marine life sightings vary by season and conditions.
The best months to visit Duffield Ridge in Queensland are June and August. Conditions outside these months can still be good but are less predictable.
Duffield Ridge in Queensland has depths ranging from 17 metres to 30 metres.
Expect moderate currents at Duffield Ridge in Queensland. Good buoyancy control and some drift diving experience is helpful.
Visibility at Duffield Ridge in Queensland typically ranges from 5 metres to 10 metres. Conditions vary with weather, tides, and seasons.