Grants Beach, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Grants Beach, New South Wales, Australia, is known for its proximity to the scenic Crowdy Bay National Park and the picturesque North Brother Mountain. The best time to visit Grants Beach, Australia, is from December to February, 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!