Wainui Beach is a small settlement on the coast of New Zealand's North Island, located just to the north of Tuaheni Point, some 8 km to the east of Gisborne, to which it is linked by State Highway 35.

The beach is one of the NZ Automobile Association's 101 Must-do places for Kiwis.

[4] Wainui Beach's most notable residents have been the Quinn family, which contains three national champion surfers - brothers Maz and Jay, and sister Holly.

Wainui Beach is in five SA1 statistical areas which cover 1.40 km2 (0.54 sq mi).

Before the 2023 census, the statistical area had a smaller boundary, covering 5.35 km2 (2.07 sq mi).

Although some people chose not to answer the census's question about religious affiliation, 55.8% had no religion, 33.2% were Christian, 0.5% had Māori religious beliefs, 0.2% were Hindu, 0.7% were Buddhist and 2.1% had other religions.