Portreath, United Kingdom offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Portreath, England, United Kingdom, is known for its historic harbor and the South West Coast Path. The best time to visit Portreath, 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!