Isle of Arran, United Kingdom offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Isle of Arran, Scotland, United Kingdom, is known for Brodick Castle, Goat Fell, and the Arran Distillery. The best time to travel to the Isle of Arran is from May to September, with average air temperatures ranging from 12°C to 18°C and water temperatures around 12°C to 15°C. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!