Nukufaiau (also: Fetokobuga, Fetokobunga) is an island in the Haʻapai archipelago that belongs to the Kingdom of Tonga.

[1] Among neighboring islands are Nukutula, Kelefesia, Nomuka, Tonumea, Fonoifua, Telekitonga, Muifuiva.

The island lies in the center of ʻOtu Muʻomuʻa along with Nukutula.

[2] The climate is tropical, but it is moderated by constantly blowing winds.

Like the other islands in the Ha'apai group, Nukufaiau is occasionally hit by cyclones.