Mertasinga, Indonesia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Kisumu is known for Lake Victoria, Dunga Hill Camp, and Impala Sanctuary. The best time to travel to Mertasinga, Indonesia, is during the dry season from May to September, with average air temperatures around 28°C (82°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!