Waihi, New Zealand offers 1 beach perfect for sunbathing, surfing, swimming, and more. Waihi is known for the Martha Mine, a historic gold mining site. The best time to travel to Waihi, 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 21°C (70°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!