Bog and Warren, Ireland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Bog and Warren, Leinster, Ireland, is known for the historic Bog and Warren Castle and the annual Leinster Folk Festival. The best time to travel to Bog and Warren, 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!