Mangonui, New Zealand offers 1 beach perfect for sunbathing, surfing, swimming, and more. Mangonui is known for the Mangonui Fish Shop and its historic waterfront buildings. The best time to travel to Mangonui, New Zealand, is during the summer months of December to February, when the average air temperature is around 22°C (72°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!