County Down Beaches Map featuring County Down beaches. Click on pins to view beach details. The beach guide has 14 beaches listed in County Down. Ballyhalbert Ballyholme Ballywalter Cranfield Bay Crawfordsburn Groomsport Helens Bay Millisle Lagoon Murlough Newcastle Nicholsons Strand Cranfield Rossglass Tyrella Beach (Clough) Warrenpoint