Sruwaddacon Bay is a tidal estuary which runs through the middle of the Gaeltacht Kilcommon parish in Erris, County Mayo, Ireland. It is of historical importance in Irish legend, an important marine habitat, an E.U. Special Area of Conservation (SAC) and an EU Special Protected Area (Birds Directive). Its translated name in English, "Stream of the Long Hound", reflects its general shape. It enters the Atlantic Ocean through Broadhaven Bay, another Special Area of Conservation.