Amoronjia Orangea, Madagascar offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Amoronjia Orangea, Diana, Madagascar, is known for the Amber Mountain National Park. The best time to travel to Amoronjia Orangea, Madagascar, is from May to October, with average air temperatures around 25°C (77°F) and water temperatures near 24°C (75°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!