

Arlington Reef sits on the outer Great Barrier Reef and offers beginner divers a genuinely impressive introduction to reef diving. Depths run from 5 to 15 metres, making it comfortable for those still building confidence underwater, and visibility regularly reaches 15 to 30 metres so you can see clearly across the reef structure. Currents are variable, so pay attention to your guide's briefing before entering. The marine life here is the real draw: Maori wrasse and parrotfish are common sights, clownfish shelter in anemones, and sea turtles move through the reef at their own pace. Reef sharks patrol the edges, and between June and October, manta rays and dwarf minke whales may also appear.
-16.68827, 146.03577
June through October gives you the best shot at seeing manta rays and dwarf minke whales, so if those are on your list, plan your visit accordingly. Jellyfish can be present year-round, so ask the dive shop crew about current conditions before you jump in.
The site is accessible via boat tours departing from the Reef Fleet Terminal in Cairns. Sunlover Cruises is one operator that runs trips to a pontoon at Arlington Reef.
The "stinger" or jellyfish season is typically from November to May. Tour operators provide protective lycra suits. Shark encounters are possible but incidents are rare; most species are smaller reef sharks.
Depth
5-15m
Visibility
10-30m
Skill Level
Beginner
Entry
Boat
Boat required
Water Temp
22-29°C
Current
Mild
Typical Dive
40 min
Best Time
Jun, Jul, Aug, Sep, Oct
Arlington Reef in the Great Barrier Reef, Queensland, ranges from 5 metres to 15 metres deep. This shallow depth profile makes it an accessible site for beginner divers whilst still offering varied underwater terrain. The maximum depth of 15 metres allows for extended bottom times and reduces nitrogen loading.
Arlington Reef near Cairns is classified as a beginner-level dive site with depths between 5 and 15 metres. The site has no current and requires only an Open Water certification, making it ideal for newly qualified divers. Boat charters from Cairns provide guided tours and all necessary support for inexperienced divers.
Arlington Reef dive site hosts diverse Great Barrier Reef species including Maori wrasse, parrotfish, clownfish, and green sea turtles. Divers may encounter reef sharks and manta rays during their dives. Between June and August, the site offers rare opportunities to swim with dwarf minke whales during their annual migration.
Arlington Reef is accessed exclusively by boat from Cairns, Queensland, with no shore entry available. Boat charters depart from Cairns marina and provide all necessary facilities including gear storage, dive shops, and guided tours. The site requires boat transport as it is located offshore on the Great Barrier Reef.
The optimal months for diving Arlington Reef are June through October when visibility reaches 15 to 30 metres. Water temperatures during this period range from 22 to 29 degrees Celsius, providing comfortable diving conditions. The winter months of June to August also coincide with dwarf minke whale season on the Great Barrier Reef.
Arlington Reef requires a minimum Open Water diving certification to dive the site. The beginner-friendly conditions with shallow depths of 5 to 15 metres and no current make it suitable for entry-level certified divers. Boat operators departing from Cairns verify certification before allowing divers to enter the water.
Divers at Arlington Reef should be aware of jellyfish, particularly during summer months, and may encounter reef sharks during dives. Marine life interaction protocols must be followed to avoid disturbing species such as turtles, manta rays, and the protected dwarf minke whales. Guided tours from Cairns operators provide comprehensive safety briefings addressing these hazards.
A 3mm wetsuit is recommended for diving at Arlington Reef in Cairns. Water temperatures range from 22°C to 29°C.
Arlington Reef in Cairns has depths ranging from 5 metres to 15 metres.
A typical dive at Arlington Reef in Cairns lasts approximately 40 minutes. Actual dive time depends on depth, air consumption, and conditions.