Bay of Islands Whangaroa Community, New Zealand offers 7 beaches perfect for sunbathing, surfing, swimming, and more. Bay of Islands Whangaroa Community, Northland, New Zealand, is known for the Waitangi Treaty Grounds and the Hole in the Rock. The best time to travel to the Bay of Islands Whangaroa Community, 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!