Cleethorpes, United Kingdom offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Cleethorpes is known for its Cleethorpes Coast Light Railway and Pleasure Island Family Theme Park. The best time to travel to Cleethorpes, United Kingdom, is during the summer months of June to August, when the average air temperature is around 18°C (64°F) and the North Sea water temperature is approximately 15°C (59°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!