Posi Posi, Indonesia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Darat, Aceh, Indonesia, is known for its traditional Acehnese culture and historical sites. The best time to travel to Posi Posi, Indonesia, is during the dry season from June to September, when the average air temperature is around 27-30°C (81-86°F) and the water temperature is approximately 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!