Evans River flows into the sea at Evans Head on the North Coast of New South Wales. Classed as a barrier river estuary, its entrance has training walls that ensure the estuary remains permanently open.
Tuckombil Canal forms the upper reach of the estuary where a concrete weir marks its upper limit. This canal joins the Richmond River upstream of the weir via Rocky Mouth Creek. Despite these impacts on the upper estuary, the lower estuary is a popular destination for swimming and fishing.