Seaford, United Kingdom offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Seaford, England, United Kingdom, is known for the Seven Sisters Cliffs and Seaford Head Nature Reserve. The best time to travel to Seaford, United Kingdom, is from June to August, when the average air temperature is around 18°C (64°F) and the water temperature is approximately 16°C (61°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!