Clacton on Sea, United Kingdom offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Clacton on Sea is known for its iconic Clacton Pier and the annual Clacton Airshow. The best time to travel to Clacton on Sea, United Kingdom, is during the summer months of June to August, when the average air temperature is around 18-22°C (64-72°F) and the water temperature is approximately 16-18°C (61-64°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!