East Trinity, Australia offers 3 beaches perfect for sunbathing, surfing, swimming, and more. East Trinity, Queensland, Australia, is known for its proximity to the Great Barrier Reef and the Wet Tropics of Queensland. The best time to travel to East Trinity, Australia, is from June to August, with average air temperatures around 20-25°C (68-77°F) and water temperatures around 23°C (73°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!