Lynmouth, United Kingdom offers 1 beach perfect for sunbathing, surfing, swimming, and more. Lynmouth is known for the Lynton and Lynmouth Cliff Railway and the Valley of the Rocks. The best time to visit Lynmouth, United Kingdom, is from June to August, when the average air temperature is around 18°C (64°F) and the 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!