The Dales, Ireland offers 1 beach perfect for sunbathing, surfing, swimming, and more. The Dales, Leinster, Ireland, is known for the scenic beauty of the Wicklow Mountains and the historic Glendalough monastic site. The best time to visit The Dales, Ireland, is from May to September, with average air temperatures around 15-20°C (59-68°F) and water temperatures around 12-16°C (54-61°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!