Isle of Lewis, United Kingdom offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Isle of Lewis, Scotland, United Kingdom, is known for the Callanish Stones and the Gearrannan Blackhouse Village. The best time to visit the Isle of Lewis is from June to August, with average air temperatures around 15°C (59°F) and water temperatures near 12°C (54°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!