About this place
Cow Rocks consist of two small reefs which are easily found, as each has a peak rising one metre about sea level. These can be seen as soon as you leave Hillarys Boat Harbour. Boats should be careful, however, not to anchor on the rich seagrass beds around this reef. To really appreciate this area, it is suggested that you treat each peak as a separate dive and carry a dive torch with you.
The eastern peak is scarred with other small caves and crevices. The invertebrate life here is abundant. The western peak has many interconnected caves, ledges and swim-throughs which demand further exploration. To explore this area, it is suggested that you proceed in an anti-clockwise direction from the broken reef on the north-west.
Plan when to visit. Consider travelling with a personal location beacon (PLB). In the event you need to be rescued it could save your life!
Do not dive when there is a moderate swell and wind greater than 15 knots.
Plants, wildlife and fungi
Visit the Atlas of Living Australia for a list of species recorded within a 5km radius of Cow Rocks.
We recognise and acknowledge Whadjuk people as the traditional owners of Marmion Marine Park.