Louth Bay, Australia offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Louth Bay, South Australia, Australia, is known for its proximity to the scenic Eyre Peninsula and the nearby Coffin Bay National Park. The best time to travel to Louth Bay, Australia, is from December to February, with average air temperatures around 25°C (77°F) and water temperatures near 21°C (70°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!