Castor Bay Beach Reserve is a seaside park on The Esplanade at Castor Bay, on Auckland's North Shore, and it carries a 4.6 rating on Google. Its listing sits on Auckland Council's parks pages, where the current details for the reserve are kept.
Beach reserves along this stretch of the east coast live and die by the tide: at high water much of the sand goes under, so it pays to check a tide chart before setting out. Summer weekends bring the crowds, and street parking near these coastal reserves fills early, so locals tend to arrive in the morning and stake out a patch of shade. Before swimming, it is worth a quick look at the council's Safeswim map for water quality, and dogs are only welcome where the signage says so.
Tucked between Milford and Campbells Bay, this reserve gives Castor Bay its own piece of the gulf's shoreline.