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Dive into the vibrant coral gardens and marine life of 4 Mile Reef with Swan Dive. This guided morning trip from Busselton offers an intimate encounter with nudibranchs, sharks, and colorful reefscapes.
Dive into the vibrant coral gardens and marine life of 4 Mile Reef with Swan Dive. This guided morning trip from Busselton offers an intimate encounter with nudibranchs, sharks, and colorful reefscapes.
Book with Swan Dive
Verified experiences and guided adventures in the surrounding area.
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Operated by Swan Dive · Busselton, Western Australia
Located just off the coast of Busselton in Western Australia, 4 Mile Reef stands as a vibrant underwater haven that attracts divers eager to witness the rich marine ecosystem within Geographe Bay. Swan Dive offers an intimate and expertly guided dive experience that brings this reef’s colorful life into sharp focus. Known for its depth ranging between 15 to 20 meters, 4 Mile Reef features expansive coral structures, thriving soft corals, and sea fan gardens, providing a dynamic backdrop for encounters with diverse marine species.
This morning dive begins early at Swan Dive’s base on the eastern end of the Busselton Jetty, where divers gather to receive top-tier equipment and meet their knowledgeable guides. The short boat ride through the sheltered waters of Geographe Bay offers views of the iconic jetty before arriving at the reef. Here, divers benefit from detailed briefings tailored to all certified levels, ensuring safety and maximizing discovery on the reef.
What sets this trip apart is the careful curation of small groups, allowing each diver the chance to spot elusive nudibranchs—a colorful, miniature sea slug species—and glimpse larger residents such as Wobbegong and Port Jackson sharks in their natural playground. The reef’s unique blend of hard and soft coral formations creates a vibrant underwater landscape that delights photogs and marine life enthusiasts alike.
Swan Dive’s commitment to fostering responsible dive tourism enhances the experience; every excursion is conducted with an understanding of local ecology and a push for sustainable practices. For travelers based in Busselton, this dive excursion is a standout option, offering both adventure and insight into southwestern Australia’s underwater riches. Whether diving solo or accompanied, this 2.5-hour adventure leaves participants with vivid memories and a deeper appreciation for one of the region’s best-kept marine secrets.
Yes, divers must be Open Water certified or higher, and have completed a dive within the past 12 months.
Expect to see diverse corals, colorful nudibranchs, Wobbegong and Port Jackson sharks, and schools of small reef fish.
The entire experience lasts about 2.5 hours including travel, briefings, and the dive itself.
All essential dive gear including tanks, regulators, wetsuits, and weights are provided upon request.
Junior Open Water certified divers can join only if accompanied by a certified adult guardian.
Trips depend on weather and minimum numbers; cancellations due to weather result in full refunds or credits with 48-hour notice for customer cancellations.
Swan Dive operates from Quindalup in Western Australia, offering guided dives, snorkel experiences and certified dive courses across South West WA. The operator runs day trips to iconic sites such as Busselton Jetty, home to an underwater sculpture trail and more than 300 marine species, and the Ex-HMAS Swan wreck, one of the Southern Hemisphere’s largest accessible wrecks. Swan Dive provides specialty and certification courses including Open Water, Rescue Diver, Wreck Diver, Deep Diving, Enriched Air (Nitrox), Advanced Adventurer and refresher programs. Practical training combines theory sessions with hands-on pool and open-water practice, and small groups are used for personalized instruction on selected courses and dives. Regular guided sites include Busselton Jetty, Wright’s Bank, 4 Mile Reef and scheduled monthly trips to deeper pinnacles. Equipment and safety procedures follow industry standards, and experienced instructors guide participants through skills, navigation and emergency techniques. Snorkel Supervisor and Try Scuba options are available for non-certified guests and families seeking shallow-water marine encounters. Swan Dive highlights the HMAS Swan wreck for its accessibility, diverse fish life and unique hull features, making it suitable for wreck specialties and recreational divers. The company’s course list and trip calendar are designed to serve new divers seeking certification, advanced learners expanding limits, and recreational snorkelers wanting curated marine experiences. Based in Quindalup, Swan Dive operates within the biodiverse marine environments of South West Western Australia, focusing on safe, educational and memorable underwater experiences. Bookings and course schedules are published online with clear prerequisites and safety information and updates.
Book with Swan Dive