Portland West, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Portland West, Victoria, Australia, is known for the Portland Bay, Cape Nelson Lighthouse, and the Great South West Walk. The best time to travel to Portland West, Australia, is during the summer months of December to February, when the average air temperature is around 20-25°C (68-77°F) and the water temperature is approximately 18-20°C (64-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!