Beaches in County Down Map featuring County Down beaches. Click on pins to view beach details. The beach guide has 16 beaches listed in County Down. Ballyhalbert Ballyholme Ballywalter Cloughey Bay Cranfield Bay Crawfordsburn Groomsport Helens Bay Knockinelder Bay Millisle Lagoon Murlough Newcastle Nicholsons Strand Cranfield Rossglass Tyrella Beach (Clough) Warrenpoint