Mosman Park, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Mosman Park, Western Australia, Australia, is known for its picturesque views of the Swan River and the historic Mosman Park Golf Club. The best time to travel to Mosman Park, Australia, is from November to March, with average air temperatures around 25-30°C (77-86°F) and water temperatures around 20-23°C (68-73°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!