Poste de Flacq, Mauritius offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Poste de Flacq, Flacq, Mauritius, is known for the luxurious Constance Prince Maurice resort and the stunning Belle Mare Plage beach. The best time to travel to Poste de Flacq, Mauritius, is from May to December, when the average air temperature is around 24-28°C (75-82°F) and the water temperature is approximately 23-27°C (73-81°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!