Mwanza, Tanzania offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Mwanza is known for its proximity to Lake Victoria and the unique Bismarck Rock. The best time to travel to Mwanza, Tanzania, is from June to October, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 24°C (75°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!