The Tengawai River (more correctly Te Ngawai) flows through south Canterbury, in New Zealand's South Island. It flows east for 35 kilometres (22 mi) before joining the Opihi River at Pleasant Point, New Zealand, 20 kilometres (12 mi) north west of Timaru.
Coordinates: 44°15′S 171°08′E / 44.250°S 171.133°E