Te Rakau Macrocarpa o Te Wai is a significant historical macrocarpa tree in Te Atatū South, Auckland, listed as a historic site. Macrocarpa is a tall conifer, and the tree's name in te reo Māori means the macrocarpa of the water.
The tree stands in the Te Atatū South area of west Auckland, in the Kelston part of the city. It is a place to see a large old tree that is recognised for its history.