Twin Beaches South is a remote, boat-access-only campground on Berowra Creek within Marramarra National Park, roughly 45 minutes from Sydney.

It is the second of two camping areas reached when heading upstream, situated about 400 metres beyond Twin Beaches North, and is noted as the larger of the two beaches and easier to access during low tides.

The site offers unmarked, unpowered tent sites on a sandy riverfront, with toilet and barbecue facilities available. No drinking water is provided on-site, and campers must carry out all rubbish. There are no camping fees, though a booking fee applies.

As a remote campground, visitors should arrive well prepared and self-sufficient.