The Coastal Upland Heath Swamp in the Sydney Basin Bioregion includes open heath, sedgeland and tall scrub which is periodically waterlogged. It occurs primarily on impermeable sandstone plateau with shallow groundwater aquifers that allow these areas to be periodically waterlogged. This community forms a treeless sedgeland with an overstorey of open low growing shrubs. It comprises needlebush, heath-leaved banksia and fern-leaved banksia. Rope-rush, slender twine-rush, zig-zag bog-rush and scale-rush make up the ground cover.
Coastal Upland Swamp can be found on the higher sandstone ridge tops in Red Hill Reserve, Garigal National Park, Bantry Bay and Ku-ring-gai Chase National Park.