Ngunguru Bay is a significant tidal estuary and coastal bay on the Tutukaka Coast of Northland, approximately 26 kilometers northeast of Whangārei. The bay is formed at the mouth of the Ngunguru River, creating a sheltered estuarine environment characterized by extensive sandy flats exposed at low tide and areas of mangrove habitat. The bay opens to the wider coastal waters of the Northland region, offering a transition zone from calm, protected estuary waters to more exposed nearshore areas. The long Ngunguru Sandspit (Pi Manu) forms a natural barrier, and the adjacent settlement of Ngunguru serves as the main service center for the coast. The area is known for its productive marine life, scenic beauty, and is part of a region undergoing active fisheries management and conservation efforts.