Lonsdale Arches

Reef DiveReef Dive | Boat access

Crayfish Dive Site Open Water Rated Outside Port Phillip Reef Dive Site

Depth: 12 metres (39 feet) to 18 metres (59 feet)

Diving Lonsdale Arches
Diving Diving Lonsdale Arches
© Ian Scholey

Discovered and named by one of the great local diving identities, Lonsdale Arches is spectacular. Approximately one kilometre from the Point Lonsdale Light and clear of the shipping channel, just outside Port Phillip Heads in the Bass Strait, Lonsdale Arches is an amazing area of Bommies and underwater rock formations.

The sandstone reef has been carved into intricate structures including arches and tunnels. The water movement feeds a rich covering of encrusting invertebrates inside the structures, while Ecklonia kelp dominates the outside. This a perfect habitat for many of southern Australia's unique critters, and a nature lovers delight.

Lonsdale Arches from Allie Beckhurst on Vimeo.

The strong current flow in this area creates a nutrient-rich environment and subsequently prolific marine growth and the associated marine life. But it's the amazing rock formations that make this dive site special. This site has a couple of amazing swim-throughs that are very safe easy to enter.

A favourite spot for catching Southern Rock Lobster (aka Crayfish), possible sightings of Giant Australian Cuttlefish, Draughtboard Shark or Port Jackson Shark sleeping under ledges, and the odd Australian Fur Seals has been known to pop down and check out what is going on here.

Crayfish Dive Site
Crayfish Dive Site | © Ian Scholey

Divers have the opportunity to catch Southern Rock Lobster (aka Crayfish) at this dive site. Remember your catch bag, current Victorian Recreational Fishing Licence, rock lobster measure, and cray tags. Once you get back to the dive boat, or shore, make sure you clip the tail and tag your Crayfish as per Fisheries requirements. Please abide by all current fishing regulations if you intend to catch crays. See How To Catch Crayfish for practical cray hunting advice from The Scuba Doctor, plus Melbourne Cray Dives for a list of other crayfish dive sites near Melbourne. For tips on cooking your Crays, please see How To Cook Crayfish.


Lonsdale Arches Location Map

Latitude: 38° 17.989′ S   (38.299817° S / 38° 17′ 59.34″ S)
Longitude: 144° 36.587′ E   (144.609783° E / 144° 36′ 35.22″ E)

Datum: WGS84 | Google Map
Added: 2012-07-22 01:00:00 GMT, Last updated: 2021-05-10 14:58:41 GMT
Source: GPS
Nearest Neighbour: Twin Bommies, 83 m, bearing 57°, ENE
Depth: 12 to 18 m.
Dive only on: Ebb.

DISCLAIMER: No claim is made by The Scuba Doctor as to the accuracy of the dive site coordinates listed here. Should anyone decide to use these GPS marks to locate and dive on a site, they do so entirely at their own risk. Always verify against other sources.

The marks come from numerous sources including commercial operators, independent dive clubs, reference works, and active divers. Some are known to be accurate, while others may not be. Some GPS marks may even have come from maps using the AGD66 datum, and thus may need be converted to the WGS84 datum. To distinguish between the possible accuracy of the dive site marks, we've tried to give each mark a source of GPS, Google Earth, or unknown.

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