Mona Vale, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Mona Vale is known for its beautiful Mona Vale Beach and the Mona Vale Golf Club. The best time to travel to Mona Vale, Australia, is from December to February, with average air temperatures around 25°C (77°F) and water temperatures about 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!