Lake Wakatipu is New Zealand’s longest lake, stretching about 80 kilometres through the South Island.
The lake occupies a long, narrow glacial valley beside the Southern Alps in Otago. Its distinctive shape resembles an extended lightning bolt, and its shoreline surrounds the resort town of Queenstown. The lake reaches a maximum depth of roughly 380 metres, making it one of New Zealand’s deepest inland waters as well as its longest.
Lake Wakatipu has a notable seiche, or rhythmic change in water level, caused by water oscillating within the lake basin. The surface can rise and fall by about 12 centimetres every 26 minutes. Māori tradition explains this movement through the heartbeat of the giant Matau, while modern science attributes it to the lake’s shape and wind-driven or atmospheric effects.
Lake Wakatipu is often confused with Lake Taupō because Taupō is New Zealand’s largest lake by surface area. Lake Te Anau is the country’s second-largest lake by area, while Lake Wanaka is another major South Island lake known for its mountain scenery.