Whangaroa Harbour, previously spelled Wangaroa Harbour, is an inlet on the northern coast of Northland, New Zealand. Whangaroa Bay and the Pacific Ocean are to the north. The small settlements of Totara North and Saies are on the west side of the harbour, Waitaruke on the south side, and Whangaroa on the east. State Highway 10 runs through Waitaruke. The name comes from the lament "Whaingaroa" or "what a long wait" of a woman whose warrior husband had left for a foray to the south. The harbour was formed when rising sea levels drowned a river valley about 6,000 years ago. Steep outcrops remain from ancient volcanic rocks.