Trevarrian, United Kingdom offers 1 beach perfect for sunbathing, surfing, swimming, and more. Trevarrian, England, United Kingdom, is known for its proximity to the scenic Watergate Bay and the vibrant town of Newquay. The best time to travel to Trevarrian, United Kingdom, is during the summer months of 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!