Kala'au, Tonga offers 1 beach perfect for sunbathing, surfing, swimming, and more. Kala'au is known for its proximity to the Ha'amonga 'a Maui Trilithon and the ancient Langi tombs. The best time to travel to Kala'au, Tonga, is from May to October, with average air temperatures around 24-28°C (75-82°F) and water temperatures approximately 25-27°C (77-81°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!