Bunmahon, Ireland offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Bunmahon is known for the Copper Coast UNESCO Global Geopark. The best time to travel to Bunmahon, Ireland, is from June to August, with average air temperatures around 15-20°C (59-68°F) and water temperatures around 14-16°C (57-61°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!