The Avoca Estuary is a significant tidal water body on Ireland's east coast in County Wicklow, formed where the Avonmore and Avonbeg rivers converge at the Meeting of the Waters to become the Avoca River, which then flows into the Irish Sea at Arklow. This estuary system, stretching from the historic Nineteen Arches Bridge to the open sea, provides a diverse mix of habitats from brackish estuary waters to sandy surf zones. Historically impacted by mining pollution, the estuary and its connected rivers remain an important ecological and recreational fishery supporting both migratory and resident fish species. It is a primary destination for shore anglers in the region, offering accessible marks and a variety of target species throughout the year.