Double Cone Island

Double Cone Island Dive Site Guide | Whitsundays, QLD, Australia

By ScubaDownUnder Team · 2026-04-12

# Double Cone Island

> A relatively undived island in the southern Whitsundays offering healthy hard coral gardens and reliable pelagic activity in clear water away from the main tourist corridors.

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## Quick stats

| Detail | Info | |---|---| | Location | Whitsundays, QLD | | Skill Level | Intermediate | | Depth Range | 5–22 m | | Typical Visibility | 5–20 m | | Water Temperature | 22–28 degrees C | | Best Season | June–November | | Entry Type | Boat | | Hazards | Strong tidal currents between the island and neighbouring landmasses; Exposed location; Marine stingers (box jellyfish and Irukandji) possible October–May | | Facilities | No shore facilities at Double Cone Island, day trips and liveaboards only; Full facilities available at Airlie Beach and Hamilton Island |

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## Double Cone Island its in the southern Whitsunday group with a quiet authority, not Hayman or Hook, not one of the sites in every brochure, but a reef environment with more hard coral than its better-known neighbours and a regular patrol of reef sharks that give the water here a sense of purpose. For divers who want the Whitsundays without the crowds, it is worth the additional distance.

The Whitsunday Islands archipelago spans 74 islands along the central Queensland coast, sitting within the Great Barrier Reef Marine Park. Double Cone Island sits in the southern section of the group, roughly equidistant between the mainland and the outer island chain, and sees considerably less traffic than the high-profile northern sites around Hook and Hardy Reef. The island itself is uninhabited and protected within the Whitsunday Islands National Park, its steep terrestrial vegetation meeting the sea in a series of rocky outcrops and small sandy beaches that give way underwater to a reef structure of reasonable complexity.

The underwater terrain around Double Cone varies by aspect. The southern and eastern faces tend to bear the heavier coral growth, hard coral structures including plate corals, staghorn formations, and massive Porites heads sit in 8–22 metres of water over a sandy substrate interspersed with rubble. The western face is more affected by prevailing weather but offers channels and gutters that create slightly more dramatic topography. Descending from the mooring, the reef comes into immediate view, the hard coral coverage here reflects the site's relative protection from the anchor damage and physical disturbance that has affected more popular Whitsunday reefs over the decades of heavy tourism use.

**Reef sharks** are the most reliably exciting aspect of Double Cone. Whitetip reef sharks (*Triaenodon obesus*) rest on the sandy patches between coral heads during the day and begin active hunting patterns in the late afternoon. Grey reef sharks (*Carcharhinus amblyrhynchos*) are sighted less predictably but appear on most dives in the deeper sections of the reef edge. Neither species poses a meaningful threat to divers, though the grey reef shark's response to being cornered, an arched back and lowered pectoral fins, is a posture worth recognising. Green turtles move through the site with characteristic calm, feeding on the reef algae with unhurried efficiency.

**Visibility **at Double Cone is variable and condition-dependent. The site sits in open water and is exposed to the movement of water through the Whitsunday channel system. In settled conditions with light tidal exchange, 15–20 metres is achievable, particularly from June to November when the southeast trade winds produce stable weather and good water clarity. The summer wet season from December through March brings reduced visibility, elevated marine stinger risk, and less predictable conditions, and this period is generally not the preferred time to dive the Whitsundays.

**Water temperature** ranges from 22°C in winter to 28°C in summer, a pleasant range that makes a 3mm wetsuit adequate for most divers for most of the year, with some opting for shorties or dive skins in the warmer months. Tidal currents between the islands can be pronounced, and dive sites are best timed around slack water on both spring and neap cycles. The boat ride from Airlie Beach takes approximately 45–60 minutes depending on operator and vessel.

> For divers visiting the Whitsundays with broader ambitions, Double Cone is best treated as a day-trip destination rather than a standalone reason to travel, the combination with other southern Whitsunday sites makes the travel time worthwhile.

## Site Access and Logistics

Double Cone Island is a boat-only dive, accessible from Airlie Beach on the Whitsunday coast. The island sits within the Whitsunday Islands National Park and is reached via commercial dive charter operators departing from Shute Harbour or Port of Airlie Marina. Transit time is approximately 45–60 minutes. The site is most commonly dived as part of a multi-site day trip through the southern Whitsunday group.

Open Water certification is the minimum, but the site's depth range and current exposure make it better suited to divers with at least some post-certification experience. Stinger suits are recommended from October through May and are provided by most operators. Airlie Beach has a full range of accommodation and services, and the Whitsunday coast has one of the best-serviced dive industries in Australia.

## Sources

- Whitsunday Regional Tourism, dive site guide - Great Barrier Reef Marine Park Authority, Whitsunday Islands zone maps - Queensland Parks and Wildlife Service, Whitsunday Islands National Park - Michael McFadyen's Scuba Diving, Whitsundays site profiles - Atlas of Living Australia, Whitetip reef shark (*Triaenodon obesus*) distribution