Newlyn, United Kingdom offers 1 beach perfect for sunbathing, surfing, swimming, and more. Newlyn, England, United Kingdom, is known for its historic Newlyn Art Gallery and the bustling Newlyn Harbour. The best time to travel to Newlyn, United Kingdom, is from June to September, when the average air temperature is around 15-19°C (59-66°F) and the average sea temperature is about 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!