Cemaes, United Kingdom offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Cemaes is known for its picturesque Cemaes Bay and the nearby Wylfa Nuclear Power Station. The best time to travel to Cemaes, United Kingdom, is from June to August, when the average air temperature is around 15-20°C (59-68°F) and the sea temperature is approximately 14-16°C (57-61°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!