Crossscales, Ireland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Crossscales, Leinster, Ireland, is known for the historic Crossscales Castle and the annual Crossscales Music Festival. The best time to travel to Crossscales, Ireland, is during the summer months of 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!