Waiau River (Southland)
General data
- Name: Waiau River (Southland)
- Water system: Pacific Ocean
- Water type: River
- Progression: Te Waewae Bay -> Foveaux Strait -> Tasman sea -> Pacific Ocean -> Planet Earth
- Climates: Temperate
- Continents: Australia & Oceania
- Countries: New Zealand
The Waiau River is the largest river in the Southland region of New Zealand. 'Waiau' translates to 'River of Swirling Currents'. It is the outflow of Lake Te Anau, flowing from it into Lake Manapouri 10 kilometres (6 mi) to the south, and from there flows south for 70 kilometres (43 mi) before reaching the Foveaux Strait 8 kilometres (5 mi) south of Tuatapere. It also takes water from Lake Monowai.
The Upper Waiau River that flows between Lakes Manapouri and Te Anau doubled as the fictional River Anduin at the end of the first film of The Lord of the Rings film trilogy, for the scenes where the Uruk-hai chase the Fellowship along the river banks.