Fakakakai, Tonga offers 1 beach perfect for sunbathing, surfing, swimming, and more. Fakakakai, Ha'apai, Tonga, is known for its proximity to the Ha'apai island group, which includes the famous whale-watching destination of Ha'apai and the historic site of Lifuka Island. The best time to travel to Fakakakai, Tonga, is from May to October, with average air temperatures around 75°F (24°C) and water temperatures near 77°F (25°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!