Dun An Oir Cottages, Ireland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Leinster, Ireland, is known for its proximity to the historic site of Dun An Oir Cottages, which offers a glimpse into Ireland's rich cultural heritage and scenic landscapes. The best time to travel to Dun An Oir Cottages, Ireland, is from May to September, with average air temperatures ranging from 50-65°F (10-18°C) and water temperatures around 55-60°F (13-16°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!