Mullaghmore, Ireland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Mullaghmore is known for Classiebawn Castle and its stunning coastal scenery. The best time to travel to Mullaghmore, Ireland, is from June to August, when the average air temperature is around 15-18°C (59-64°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!