Boscastle, United Kingdom offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Boscastle is known for the Museum of Witchcraft and Magic and its picturesque harbor. The best time to travel to Boscastle, United Kingdom, is from June to August, when the average air temperature is around 16-19°C (61-66°F) and the sea temperature is approximately 15-17°C (59-63°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!