Chelsea, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Chelsea is known for Chelsea Beach and Bicentennial Park. The best time to travel to Chelsea, Australia, is during the summer months of December to February, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 20°C (68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!