Warnbro, Australia offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Warnbro, Western Australia, Australia, is known for Warnbro Beach and its proximity to the Shoalwater Islands Marine Park. The best time to travel to Warnbro, Australia, is from November to March, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 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!