Port Denison, Australia offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Port Denison is known for its picturesque marina and the annual Blessing of the Fleet festival. The best time to travel to Port Denison, Australia, is from November to April, with average air temperatures around 25-30°C (77-86°F) and water temperatures around 22-26°C (72-79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!