Doubtless Bay is a bay situated on the east coast of the Northland Region, north-east of Kaitaia, in New Zealand. It extends from Knuckle Point in the north to Berghan Point in the south. There are rocky headlands, backed by many extensive beaches, such as Tokerau Beach, Taipa, Cable Bay, Coopers Beach, and Mangonui Harbour.
Kupe, the Māori discoverer of New Zealand, is said to have made his initial landfall at Taipa, in Doubtless Bay.
Doubtless Bay was named by Captain James Cook during his first voyage of Pacific exploration in 1769. When Cook sailed past the entrance to the area, he recorded in his journal "doubtless a bay", hence the name. Poor weather prevented Cook from entering the bay proper, though a number of Maori longboats put out from shore to come alongside Cook's ship Endeavour and sell fish to her crew.
In the same year the bay was visited by Jean-François-Marie de Surville in his ship the Saint Jean Baptiste. In retaliation for the theft of a longboat which had gone adrift after his ship had dragged her anchor in a storm and narrowly escaped destruction, he carried off a Maori chief and set his village on fire. While at Doubtless Bay at Christmas 1769, de Surville's chaplain Father Paul-Antoine Léonard de Villefeix OP conducted the first Christian service in New Zealand.
Today the only vegetation is short scrub, some gorse and wiwi. The area was a centre of kauri gum extraction.
Coordinates: 34°55′41″S 173°26′34″E / 34.928164°S 173.442821°E