Boyinaboat Reef is a shallow reef located 75 metres from the shore in Cottesloe, Australia. The site features a depth range of 3 to 8 metres with an average of 4 metres, making it suitable for beginners. Divers and snorkellers can expect visibility between 5 and 10 metres. Entry is via the shore, though the harbour wall rocks can be difficult to navigate. The site is prone to surge, particularly when swells exceed 1 metre, and visibility may decrease in rough conditions. Water temperatures range from 19C to 23C throughout the year. It is recommended to visit early in the morning when conditions are calmest.

Hillarys North Wall is a shallow shore dive located in Cottesloe, Australia, offering a gentle experience for beginners. The site features a wall and reef structure at depths ranging from 2 to 6 metres, with an average of 8 metres. Divers can expect mild currents and visibility between 5 and 10 metres. Hazards include boat traffic, surge, and low visibility. Divers should shuffle their feet upon entry to avoid stingrays and remain close to the wall for safety. Facilities at the site include parking, toilets, showers, and access to local dive shops for guided tours. Night diving is permitted, with typical dives lasting 40 minutes.

Wreck Rock in Cottesloe offers a varied dive experience combining reef structures and caves at depths between 7 and 25 metres. Located 1000 metres offshore, this site requires boat access and is suited for intermediate divers. Conditions include a mild current and visibility ranging from 3 to 10 metres. Divers should be aware of surge and swell, particularly when navigating the cave systems. Hazards at the site include sharp coral and potential entanglement risks from debris or fishing lines. Water temperatures fluctuate between 19C and 23C throughout the year. The site is supported by local facilities including parking, toilets, showers, and nearby boat charter services.

Little Island is a shallow reef site located 2000 metres off the coast of Cottesloe. The reef features depths ranging from 1 to 6 metres, with an average depth of 2 metres. Visibility at the site is variable, typically ranging between 10 and 30 metres. Divers should be prepared for a moderate current and must access the site by boat. Due to the shallow nature of the reef, it is suitable for beginner divers. Hazards include sea urchins, boat traffic, and the presence of Australian sea lions, which are wild animals that can be territorial. Great white sharks have been sighted in the broader area.

Whitfords Rock is a reef site located off the coast of Cottesloe, Australia. This site is suitable for beginner divers, featuring mild currents and depths ranging to 25 metres. Access to the reef is by boat, and divers should remain aware of boat traffic in the area at all times. Due to the variable nature of the site, it is recommended to check recent conditions before planning a dive. Divers should descend slowly and maintain proximity to their guide, particularly in deeper sections. Always deploy a safety sausage upon surfacing to ensure visibility to passing vessels.

Marmion Marine Park at Cottesloe provides an accessible shore entry into a varied underwater landscape of reef formations and seagrass beds. Depths are shallow, ranging from 0 to 9 metres with an average of 3 metres, making it suitable for beginners. Divers and snorkellers should be aware of moderate currents, surge, and potential rip currents, particularly when swells increase. Entry is over sand and rocks, and conditions can change rapidly with the afternoon sea breeze. Facilities at the site include parking, toilets, showers, and changing rooms. Recent improvements have provided ramp access, though water entry remains over a rocky shoreline.

North Lump is a deep wreck site located 18.5 kilometres off the coast of Cottesloe, Australia. The site features a wreck structure that serves as an artificial reef, with depths ranging from 26 to 42 metres and an average depth of 32 metres. Due to the depth and overhead environments within the wreck, this site is strictly for advanced divers. Divers must manage decompression stops, nitrogen narcosis, and entanglement risks carefully. Currents are variable and can shift unexpectedly. Boat access is required for this site, which typically involves a 20-minute dive duration. Visibility can be limited, and divers should be prepared for reduced light conditions during penetration.

The MAAC Dive Trail in Cottesloe is a shore-accessible site featuring a mix of reef, seagrass, and artificial structures. Divers and snorkellers can explore depths ranging from 2 to 7 metres, with an average depth of 5 metres. The site is suitable for beginners, though conditions vary with moderate surge and potential surf. Visibility fluctuates between 3 and 20 metres. Hazards include boat traffic from the nearby ramp, rip currents, and surge that may push divers toward shallow reef sections. Facilities at the site include parking, toilets, and showers. Water temperatures range from 19C to 23C throughout the year.