As far as secret Sydney Harbour beaches go, Kutti Beach right up there. Make your way to the end of Wharf Road in Vaucluse. When you see the wooden boatshed—it’s the Vaucluse Amateur Sailing Club building—look for the gap in the fence and a very narrow wooden staircase heading down. It’s the only way in and out, unless you have quite a few million to buy one of the mansions that overlook the beach.
Once you’re there this is a beauty, but not on high tide, when it nearly disappears for a couple of hours. We came mid-tide and it was great. Locals use it as an unofficial off-lead dog beach, which is cool with us, but as such it does get very popular from around 9am. The early birds get the free local street parking.
There are no facilities of any kind, but it’s worth it and we’d return for sure.