Dunmoran, Ireland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Dunmoran, Connaught, Ireland, is known for its picturesque coastal scenery and tranquil beaches. The best time to travel to Dunmoran, Ireland, is from June to August, when the average air temperature is around 15-20°C (59-68°F) and the water temperature is approximately 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!