Pevensey, United Kingdom offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Pevensey, England, United Kingdom, is known for Pevensey Castle, a historic site with Roman and medieval ruins. The best time to travel to Pevensey, 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!