Depart Fremantle for an eight‑hour boat trip to Rottnest Island that includes two deep dives to around 30m, lunch, and tea. Advanced-certified divers will find dramatic limestone caverns and swim-throughs shaped by open Indian Ocean currents.
More ways to explore the area's outdoor wonders
The morning light off Fremantle slices across a glassy Indian Ocean as the 68ft catamaran eases away from the jetty. Salt carries on the breeze and gulls wheel overhead; within an hour the coastline has shrunk to a thin ribbon and Rottnest Island fills the horizon — limestone buttresses and hidden clefts that invite descent.
Difficulty
challenging
Duration
8 hours
Fitness Level
Should have good cardiovascular fitness and moderate-to-strong swimming ability; comfortable with multi-hour boat days and surface swimming.
Wildlife
History
Rottnest’s limestone formed from marine deposits; European maritime history and Aboriginal connections shape its shorelines and reef names.
Conservation
Rottnest waters are a managed reserve—practice no‑touch diving, avoid disturbing benthic communities, and follow the island’s marine park regulations to protect sensitive habitats.
Reserve your spot on the Rottnest Island Deep Dive Day Trips today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Bring a second cylinder
Only one air cylinder is included — bring or reserve a second if you plan repetitive or deeper work, especially for long bottom times.
Confirm certification
You must hold Advanced Open Water (or equivalent) and be comfortable with deep dives and buddy protocols.
Pack a dry bag
Store spare clothes, paperwork, and electronics in a small dry bag; decks get wet during boarding and exits.
Check weight and trim
Fine-tuned weight and good trim are crucial for swim-throughs and reef conservation to avoid accidental contact.
Dive computer
Critical for monitoring depth/time and no‑decompression limits on deep profiles.
Primary regulator + octopus
Reliable breathing systems and an alternate second stage are non‑negotiable for safe buddy diving.
Exposure suit (3/2–5/4mm or drysuit)
Water temperatures vary; a suitable suit maintains core warmth on long dives and during surface intervals.
fall
Surface signaling device (SMB/whistle)
A delayed surface marker buoy and audible device improve visibility to the boat in current or swell.