Saint Augustin, Madagascar offers 1 beach perfect for sunbathing, surfing, swimming, and more. Saint Augustin, Atsimo Andrefana, Madagascar, is known for the Tsimanampetsotsa National Park and its unique baobab trees. The best time to travel to Saint Augustin, Madagascar, is from May to October, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 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!