Horseshoe Reef at Rottnest Island is a boat-accessible site featuring a combination of open reef and cave topography. Suitable for beginners, the site reaches depths of up to 18 metres. Divers experience mild currents, though conditions can vary between visits. When exploring the cave section, it is important to remain close to the reef to maintain orientation. Due to active boat traffic in the area, divers must conduct a thorough surface check before ascending and exercise caution when entering or exiting the water. The site provides a varied underwater environment for those building their diving experience.

The City of York is a historic wreck located 200 metres offshore at Rottnest Island. Resting in shallow waters between 4 and 9 metres deep, this site is suitable for beginners. Divers explore the wreck structure and surrounding reef, which feature sponges and various marine life including crayfish, Western Blue Devil, Western Dhufish, Western King Wrasse, and Australian Giant Cuttlefish. Conditions are generally manageable with a mild current, though visibility varies significantly from 3 to 20 metres depending on weather. Boat access is required to reach the site. Divers should exercise caution regarding sharp coral and potential entanglement hazards within the wreck structure, while also monitoring surf conditions before entry.

Shark Cave at Rottnest Island is an advanced dive site featuring a cavern and cave system. Located 1000 metres offshore, the site requires boat access and is exposed to weather, with dives restricted to conditions with swell under 1 metre and winds below 15 knots. Depths range from 10 to 26 metres. Divers must navigate an overhead environment, moderate to strong currents, and potential surge. Due to these factors, the site demands advanced buoyancy control and specific overhead environment training. Divers should carry a torch and time entries around slack water to manage currents effectively.

Eagle Bay at Rottnest Island offers a diverse underwater environment featuring natural reef, a wreck, and artificial reef structures. Divers can explore depths ranging from 6 to 32 metres, with an average depth of 15 metres. Visibility typically spans 10 to 25 metres. The site is suited for intermediate divers due to moderate currents and the potential for down currents, particularly near the wreck. Shore and boat entries are both possible. When entering from the shore, shuffle your feet to avoid stonefish and sea urchins. Divers should remain aware of strong currents and maintain a safe distance from lionfish and sharks.

Fish Hook Bay at Rottnest Island provides a shallow, sheltered environment suitable for beginner divers and snorkellers. The site features a mix of reef and seagrass habitats with depths ranging from 1 to 10 metres, averaging 3 metres. Visibility typically reaches 10 to 20 metres, though conditions vary with weather. Access is by boat only. Divers should remain aware of potential surge in depths around 6 metres during moderate swells. General boat traffic is present in the area, and visitors should be mindful of sharks as part of the local marine environment. Typical dive times are approximately 45 minutes.

West Patch is a boat-access reef and cave site located 1000 metres off Rottnest Island. The topography features a mix of reef structures and caves, with depths ranging from 18 to 26 metres and an average of 20 metres. Divers should be prepared for moderate currents, surge, and potential thermoclines. Visibility varies between 4 and 15 metres. Due to the overhead environment within the caves and the presence of strong currents, this site is suited for intermediate divers. Proper buoyancy control is essential when navigating the cave systems, and carrying a light is recommended. Typical dive times are approximately 40 minutes.

Nancy Cove at Rottnest Island is a shallow, sheltered site ideal for beginners. The topography features a reef and a cave system, with depths ranging from 2 to 8 metres and an average of 5 metres. Visibility is typically between 15 and 30 metres, allowing for clear observation of the underwater terrain. Access is possible via boat or from the shore, located 100 metres out. Divers and snorkellers should be aware of potential surge near the cave entrance and remain cautious of boat traffic in the area. Facilities including parking and showers are available nearby. The site is generally calm, though sharp coral is present.

Green Island at Rottnest Island features a combination of natural and artificial reef structures. The site ranges from shallow depths to 37 metres, with an average depth of 15 metres. Access is by boat, as the site is located 2000 metres from the shore. Divers and snorkellers should be prepared for moderate currents and visibility between 10 and 30 metres. Hazards include sharp coral, jellyfish, and variable currents. Beginners are advised to remain in the shallower sections of the reef. Facilities including a dive shop, toilets, showers, and a cafe are available nearby.