Hornsea, United Kingdom offers 1 beach perfect for sunbathing, surfing, swimming, and more. Hornsea is known for Hornsea Mere, the largest freshwater lake in Yorkshire, and its historic Hornsea Pottery. The best time to travel to Hornsea, United Kingdom, is from June to August when the average air temperature is around 18°C (64°F) and the average sea 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!