Glan yr afon, United Kingdom offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Glan yr afon, Wales, United Kingdom, is known for its proximity to the scenic Brecon Beacons National Park. The best time to travel to Glan yr afon, United Kingdom, is during the summer months of June to August, when the average air temperature is around 15-20°C (59-68°F) and water temperature is approximately 15°C (59°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!