Kurnell, Australia offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Kurnell is known for the Kamay Botany Bay National Park and its historical significance as the landing site of Captain James Cook in 1770. The best time to travel to Kurnell, Australia, is from December to February, with average air temperatures around 25°C (77°F) and water temperatures near 22°C (72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!