Flatts, Bermuda offers 10 beaches perfect for sunbathing, surfing, swimming, and more. Flatts, Smiths, Bermuda, is known for the Bermuda Aquarium, Museum and Zoo. The best time to travel to Flatts, Bermuda, is from April to October, with average air temperatures ranging from 70°F to 85°F and water temperatures from 75°F to 82°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!