On 1 July 2025, NIWA merged with GNS Science to become Earth Sciences New Zealand.

River flows, April - June 2015

River flows over the last three months were well above normal in the west and south of both islands and the eastern Bay of Plenty.

River flows over the last three months were well above normal in the west and south of both islands and the eastern Bay of Plenty, and generally below to well below normal everywhere else.

River Flow April - June 2015.