Manuae, Cook Islands offers 1 beach perfect for sunbathing, surfing, swimming, and more. Manuae, Ruakau, Cook Islands, is known for its pristine coral reefs and the Manuae Conservation Area. The best time to travel to Manuae, Cook Islands, is from May to October, with average air temperatures around 77°F (25°C) and water temperatures near 79°F (26°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!