Hihi, New Zealand offers 1 beach perfect for sunbathing, surfing, swimming, and more. Hihi, Northland, New Zealand, is known for its proximity to Mangonui Harbour and the scenic Doubtless Bay. The best time to travel to Hihi, New Zealand, is during the summer months of December to February, when the average air temperature is around 24°C (75°F) and the water temperature is approximately 20°C (68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!