Lavengatonga, Tonga offers 1 beach perfect for sunbathing, surfing, swimming, and more. Lavengatonga is known for the Ha'amonga 'a Maui Trilithon, an ancient stone structure. The best time to travel to Lavengatonga, 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!