Western Australia · 6 sites
Nullarbor Caves dive sites
Under the Nullarbor Plain lie some of the longest and deepest underwater cave systems on earth: Cocklebiddy (more than 6 km of passage), Weebubbie, Tommy Grahams, Murra-El-Elevyn and Pannikin Plain. These are expedition cave dives requiring permits from the WA Department of Biodiversity, Conservation and Attractions, full cave qualifications and self-sufficiency in a place with no services.
- Sites
- 6
- Wrecks
- 0
- Shore
- 0
- Boat
- 0
- Beginner
- 0
- Deepest
- 40 m
Conditions outlook · Late September – October 2026
Written 27 September 2026The Nullarbor caves are dived April–October when surface temperatures make the gear hauls bearable; October is the end of the season. Cave-rated divers only, with CDAA permits and a support team.
Getting there
By road along the Eyre Highway, 1,200 km east of Perth; the caves are on pastoral leases or in reserves with locked gates.
When to go
April to October, for cooler surface temperatures during the gear hauls.
Water & suit
Summer 19 °C · winter 19 °C. Drysuit or 5-7 mm wetsuit; many divers use drysuits for long exposures and dry-cave carries
Nearest chamber: Fiona Stanley Hospital Hyperbaric Medicine Unit (Murdoch, Perth) – about 1,100-1,400 km; RFDS aeromedical evacuation essential (Royal Adelaide Hospital hyperbaric unit may be closer for sites near Eucla)
Most recorded marine life in Nullarbor Caves
- Stygofauna; no fish 3
Plan a dive trip to Nullarbor Caves →Find your diveCompare the top 4 side by sideNew diver? Start here
The most-dived sites in Nullarbor Caves
Suggested trip
A 1-day dive trip to Nullarbor Caves
Built from the sites in this region: an easy start, the signature dives, then something deeper or further. Swap days around the weather; the site pages say which winds and swell close each one.
Build your own Nullarbor Caves plan: pick days, level and must-dive sites →Day 2 · The signature dives
A charter day on the sites people travel to Nullarbor Caves for.
- Murra-El-Elevyn CaveCave/Cavern · Max 20 m · Cave/Cavern certification
- Tommy Grahams CaveCave/Cavern · Max 36 m · Cave/Cavern certification
Map of Nullarbor Caves dive sites
Click a pin for the site. 1 sites without published coordinates are not shown.
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5 pinned sites. Pins marked approximate on their pages show the general area only; not for navigation.
All 6 Nullarbor Caves dive sites
All Nullarbor Caves sites at a glance
6 sites in Nullarbor Caves · click a column to sort
| Cocklebiddy Cave | Cave/Cavern | Max 20 m | Cave/Cavern certification | Shore | Expedition |
| Murra-El-Elevyn Cave | Cave/Cavern | Max 20 m | Cave/Cavern certification | Shore | Expedition |
| Olwolgin Cave | Cave/Cavern | Max 15 m | Cave/Cavern certification | Shore | Expedition |
| Pannikin Plains Cave | Cave/Cavern | Max 40 m | Cave/Cavern certification | Shore | Expedition |
| Tommy Grahams Cave | Cave/Cavern | Max 36 m | Cave/Cavern certification | Shore | Expedition |
| Weebubbie Cave | Cave/Cavern | Max 40 m | Cave/Cavern certification | Shore | Expedition |
Nullarbor Caves diving FAQ
How do I get to the dive sites in Nullarbor Caves?
By road along the Eyre Highway, 1,200 km east of Perth; the caves are on pastoral leases or in reserves with locked gates.
When is the best time to dive Nullarbor Caves?
April to October, for cooler surface temperatures during the gear hauls.
How many dive sites are there in Nullarbor Caves?
6 documented sites. The deepest reaches 40 m.
How cold is the water in Nullarbor Caves?
Typically 19 °C in summer and 19 °C in winter. Most divers wear drysuit or 5-7 mm wetsuit; many divers use drysuits for long exposures and dry-cave carries.
Where is the nearest recompression chamber to Nullarbor Caves?
Fiona Stanley Hospital Hyperbaric Medicine Unit (Murdoch, Perth) – about 1,100-1,400 km; RFDS aeromedical evacuation essential (Royal Adelaide Hospital hyperbaric unit may be closer for sites near Eucla). In an emergency call 000, then DAN Asia-Pacific on 1800 088 200.
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