Yumani, Bolivia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Yumani, La Paz, Bolivia, is known for Isla del Sol, an island on Lake Titicaca with Inca ruins and stunning views. The best time to travel to Yumani, Bolivia, is from May to September, with average air temperatures around 60°F (16°C) and water temperatures near 50°F (10°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!