Trinity Beach, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Sainte Angele de Monnoir is known for its picturesque countryside and proximity to the Mont Saint-Grégoire hiking trails. The best time to visit Trinity Beach, Australia, is from May to October, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 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!