Dumore, Ireland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Dumore, Leinster, Ireland, is known for its picturesque landscapes and historic sites. The best time to travel to Dunmore, 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!