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Long Reef Wall

Long Reef Wall



Sydney, New South Wales

Type of dive:                            Reef

Access:                                      Boat (45 minutes)

Minimum qualification:      Open Water (Advanced recommended)

Depth:                                       12-21 metres (40-70’)

Visibility:                                  10-25 metres (50-100’)

Water temperature:              17°C (63°F) 23°C (73°F)

Best time to visit:                   October – June

Snorkelling:                              Yes, lots to explore just off the shore!


On a headland just north of Sydney, between the suburbs of Dee Why and Collaroy, lies Long Reef Aquatic Reserve, the oldest aquatic reserve in New South Wales.

Long Reef Point has the oldest exposed sediments on the coastline and is mainly composed of chocolate shale which extends underwater creating fantastic submarine terrain, just a short distance out from the edge of the intertidal reef.

The primary purpose of the Long Reef Aquatic Reserve is to protect the intertidal zone but it is also an important site for migratory seabirds.

Underwater the reef edge forms Long Reef Wall running for about 200 metres (650’) in a roughly south to north direction, dropping from eight metres (25’) at the top, to sand and boulders at around 21 metres (70’).

Along the wall there are spectacular rock formations which create fantastic dive sites teeming with fish. Sometimes cave entrances can be nearly blacked out by thousands of fish giving the appearance of a night dive.

One of the most incredible underwater structures is known as ‘The Cathedral’ and is created by two large slabs of rock forming a church-like roof structure. Inside the Cathedral, a large rock forms an altar-shape and an opening, filled with fish, gives the appearance of a stained glass window.

Another spectacular section of the wall is known as ‘The Apartments’ and runs from the middle of the reef to the northeast, where the underwater scene resembles a block of flats lying on their side, creating incredible swim-throughs, overhangs, caves, boulder stacks and bommies.

Just about every space on Long Reef Apartments is teeming with fish; from solitary eastern blue devils to huge schools of eastern pomfret (Schuettea scalaripinnis), also called ladder-finned pomfret. Yellowtails and bullseyes add to the incredible density of resident schooling fish.

Other commonly seen fish include moray eels, blue groper, red morwong, black cod, Port Jackson sharks and wobbegongs.

Visits from large bull rays, grey nurse sharks, yellowtail kingfish and giant cuttlefish are also common.

Long Reef Apartments is arguably Sydney’s best dive, certainly the fishiest!

Copyright C 2015 Steve Sinclair


Other great dives to do while you are there:                            

Blue Fish Point, Harbord Headland, The Dukenfield, Shelly Beach and Fairlight.


Dive services:

Phone: (02) 9958 5699


Phone: (02) 9283 6400


Phone: (02) 9311 0708


Getting there:



Water temperatures:

Long Reef Wall sea temps