Dive Site: Perpendicular Point Cave

About Perpendicular Point Cave

Point Perpendicular, located on the northern headland of Jervis Bay in New South Wales, presents a dive experience characterized by its spectacular underwater cliffs and rich benthic diversity. Named by Lieutenant James Cook in 1770, the site features sheer rock walls that extend well below the surface, creating a visually stunning topography. The dive site, sometimes referred to as 'Sponge Garden' or 'Pyramid Rock,' is known for its extensive coverage of sponges, sea squirts, and gorgonian corals that adorn massive boulders and intricate rock formations. Depths typically range from a reef top at 25 meters down to a sandy bottom at around 34 meters, with dramatic drop-offs mirroring the iconic cliffs above. While not explicitly a 'cave' dive in the traditional sense, the rugged underwater landscape includes gullies and swim-throughs, offering explorers varied routes. Marine life, though not as abundant in terms of schooling fish as some sites, includes species like black reef leatherjackets, wobbegongs, and seasonally, Port Jackson sharks. The true spectacle lies in the vibrant, fixed marine invertebrates. Access is typically by boat, requiring careful positioning due to the sheer cliffs and specific depth profiles. The site is a favorite for those seeking to immerse themselves in a colorful, deep-water environment, appealing to divers who appreciate macro life and geological formations over large pelagic encounters.

Dive site facts: Perpendicular Point Cave

Depth

25–34 m

Current

Mild

Entry

Boat

Level

Advanced

Dive type

Reef, wall, deep, macro

Region / port

Jervis Bay, New South Wales

Coordinates

35° 05.5513' S 150° 47.9825' E

Conditions & Currents

Information on currents at Perpendicular Point Cave is not explicitly provided in the sources. However, as with any site along a prominent headland and cliffs, divers should be prepared for potential current variability, especially outside of sheltered bays. Boat entry and exit are standard, requiring effective communication with the dive operator for safe positioning. Divers should maintain strong buoyancy control to navigate the deeper sections and avoid contact with the delicate fixed marine life. Gas planning should account for the typical depths encountered, around 25-34 meters, and potential variations in conditions.

Marine life & sighting chances

Black reef leatherjackets

common

Wobbegongs

occasional

Port Jackson sharks

early winter · occasional

Sponges

common

Sea squirts

common

Gorgonian corals

common

Dive profile & how the dive runs

A typical dive at Point Perpendicular Sponge Garden begins with a boat entry, followed by descent to the reef edge, ideally at approximately 25 meters, near the anchor point. Divers then explore the sandy bottom at about 34 meters, characterized by massive boulders covered in vibrant sponges and sea squirts. The route involves moving along the sand edge and among these large formations, observing black reef leatherjackets and potentially wobbegongs. As the dive progresses, ascend gradually in a northerly direction along the reef, investigating nice gullies and swim-throughs. The focus is on the rich fixed marine life. The dive concludes with a safety stop along the shallower reef section before returning to the boat for exit.

Underwater photography

To capture the extensive sponge gardens and gorgonian corals at Point Perpendicular, a wide-angle lens is recommended to convey the scale of the formations. For macro subjects like the smaller details of sponges, sea squirts, and potential tiny critters, a macro lens would be beneficial. Due to the typical depths of 25-34 meters, external strobes or powerful video lights are essential to restore natural colors and improve contrast, especially in the deeper, darker sections. Divers should exercise excellent buoyancy control to avoid disturbing the delicate fixed invertebrates and silt on the seabed, ensuring clear shots.

Combine with nearby dive sites

• Sutherland Point

  Sutherland Point offers an accessible shore diving experience along the dramatic coastline of Kurnell in Botany Bay, Sydney, New South…

• Anenome Bay

  Anenome Bay is a captivating dive site situated within the expansive Great Barrier Reef system in Australia, renowned for its incredible…

• Camp Cove

  Camp Cove South is a serene, shallow dive site nestled in Sydney, Australia, renowned for its suitability for new divers and training…

• Harry's Bommie

  Harry's Bommie is a captivating garden reef nestled within Agincourt Reef #4, a prime location on the outer edge of Australia's Great…

• The Slide

  The Slide, Terrigal, is a boat-access reef dive known for its distinctive topography and thriving marine life.

Getting there & logistics

Perpendicular Point Cave is located off Point Perpendicular, the northern headland of Jervis Bay, New South Wales, Australia. Access to this site is exclusively by boat, typically departing from local dive operators in the Jervis Bay area. While specific details on airports and trip lengths are not provided, Jervis Bay is a popular destination accessible from major cities like Sydney. Divers usually combine this site with other local dives in Jervis Bay, known for its diverse marine environments. No specific permits or park fees for diving are mentioned, but divers should confirm with their chosen operator.

Safety & environment

While no specific safety information for Perpendicular Point Cave is provided, general safety guidelines for diving apply. Divers should maintain excellent buoyancy control to avoid contact with the reef and manage air consumption effectively, especially given the typical depths of 25-34 meters. Cave diving principles, as described in source 7, regarding proper training and gas management, are crucial for any overhead environment, though this site is described as gullies and swim-throughs rather than intricate cave systems requiring full cave certification. The nearest recompression chamber would likely be in a major urban center like Sydney. Divers should always have appropriate dive insurance and follow local dive operator briefings and safety protocols for current conditions and site-specific hazards.

Who it suits — and who it doesn't

FAQ

Perpendicular Point Cave FAQ

Liveaboards diving Perpendicular Point Cave

These liveaboards may visit Perpendicular Point Cave on selected itineraries — the exact dive sites depend on departure, weather and conditions.

Spoilsport

Australia

28 guests30 m

$404/day

Odyssey Liveaboard

Australia

20 guests24 m

$392/day