Murreagh, Ireland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Murreagh, Leinster, Ireland, is known for the historic Murreagh Castle and the scenic Murreagh Cliffs. The best time to travel to Murreagh, Ireland, is from June to August, when the average air temperature is around 15°C (59°F) and the water temperature is approximately 14°C (57°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!