Whaitiri is a female atua and personification of thunder in Māori mythology. She is the grandmother of Tāwhaki and Karihi. Whaitiri is the granddaughter of Te Kanapu, son of Te Uira, both of whom are personified forms of lightning. Another more primary atua of thunder, a male, is Tāwhirimātea.

Māori mythology and Māori traditions are two major categories into which the remote oral history of New Zealand's Māori may be divided. Māori myths concern tales of supernatural events relating to the origins of what was the observable world for the pre-European Māori, often involving gods and demigods. Māori tradition concerns more folkloric legends often involving historical or semi-historical forebears. Both categories merge in whakapapa to explain the overall origin of the Māori and their connections to the world which they lived in.