Kolonia, Micronesia offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Kolonia is known for Nan Madol, a UNESCO World Heritage site featuring ancient stone ruins. The best time to travel to Kolonia, Micronesia, is from December to April, with average air temperatures around 27°C (81°F) and water temperatures near 29°C (84°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!