Shell Cove, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Shell Cove is known for the Shellharbour Marina and the Killalea State Park. The best time to travel to Shell Cove, Australia, is from December to February, with average air temperatures around 25°C (77°F) and water temperatures near 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!