Calcoene, Brazil offers 1 beach perfect for sunbathing, surfing, swimming, and more. Calcoene is known for the Calcoene Megalithic Observatory, often referred to as the "Amazon Stonehenge." The best time to travel to Calcoene, Brazil, is from September to November, with average air temperatures around 27°C (81°F) and water temperatures near 28°C (82°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!