Saint Andrews Beach, Australia offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Saint Andrews Beach, Victoria, Australia, is known for the Mornington Peninsula National Park and its stunning coastal scenery. The best time to visit Saint Andrews Beach, 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!