Sumalata, Indonesia offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Sumalata, Gorontalo, Indonesia, is known for the Bogani Nani Wartabone National Park. The best time to travel to Sumalata, Indonesia, is from June 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!