Magnetic Island, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Magnetic Island is known for its Magnetic Island National Park, Forts Walk, and the annual Magnetic Island Race Week. The best time to visit Magnetic Island, Australia, is from May to September, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 23°C (73°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!