Llandanwg, United Kingdom offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Llandanwg is known for its historic St. Tanwg's Church and its scenic beach. The best time to travel to Llandanwg, United Kingdom, is during the summer months of June to August, when the average air temperature is around 16-20°C (61-68°F) and the water temperature is approximately 15-17°C (59-63°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!