The Te Kuha water level recorder is situated on the Buller River in the lower Buller catchment, 16 km upstream of the township of Westport. The site has a catchment area of 6350 km2
The site can record quite dramatic rises in water level in response to heavy rain in the coastal Paparoa Ranges. Rates of water level rise of 0.4 m per hour are not uncommon. The site also commonly records prolonged flood peaks due to the influence of Lake Rotoroa and Lake Rotoiti at its headwaters. Summer water levels at this site can get as low as 0.9 m but normal water levels are closer to 1.4 m. A high flood water level of 11.8 metres was recorded at this site in August 1970.
The First Stage Alarm Level for Flood Warning at this site is 7.4 m.
This site is operated by the National Institute of Water & Atmosphere (NIWA) as part of the National Hydrometric Monitoring Network, and is a part of the West Coast Regional Council Flood Warning Network.