Billerough, Ireland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Billerough, Munster, Ireland, is known for the Billerough Castle and the annual Billerough Music Festival. The best time to travel to Billerough, 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!