The Wellstead Estuary is a 13-kilometer long coastal estuary located near Bremer Bay. It is fed by the Bremer River and is a significant aquatic habitat, tranquil and expansive. The estuary is ideal for kayaking and paddleboarding. A designated Wellstead Estuary Walk Trail exists along its perimeter, indicating potential for shore-based access. The estuary's connection to the ocean is intermittent; it breaks through a sand bar to the sea, which can influence conditions. The main Bremer Beach lies on the opposite side of this estuary mouth, accessible via the sand bar at certain times or by a 45-minute drive when it is closed. This suggests the estuary mouth area could be dynamic, with potential for a surf zone or strong currents when open. The overall paddling experience is likely calm and scenic, focused on wildlife observation. The estuary is home to over 100 species of birds and is a major feeding ground for migratory birds on the East Asian Australasian flyway from September through April. It also supports fish, crustaceans, and shellfish. The water body can experience significant seasonal variation; the lagoons within the system are often dry in summer and only fill after heavy winter rains. Facilities such as BBQs, toilets, and outdoor showers are available at nearby Paperbark Park, which is a short walk from John Cove beach.