Probabilities are assigned in three categories: above average, near average, and below average. Temperatures are very likely to be above average (60% chance). Rainfall totals are about equally likely ...

A new online tool that identifies areas at risk from groundwater flooding has been developed by New Zealand scientists. Groundwater flooding occurs when the water table rises close to the surface, ...

A team of NIWA freshwater ecologists have completed their research on the use of biodegradable plant mats as life rafts to help reintroduce native aquatic plants to degraded freshwater lakes. The ...

NIWA freshwater scientists have launched a groundbreaking initiative that is transforming mapping of freshwater environments. The team of hydro-ecological modellers have developed digital networks ...

Freshwater Update 92 brings you the latest information from NIWA's Freshwater Centre.

Could bubbles and strobe lights stop pest fish swimming where they’re not wanted? A team of NIWA freshwater scientists is investigating the effectiveness of an acoustic bubble-screen coupled with ...

New Zealand could face twice as many of the most extreme atmospheric rivers by the end of the century, according to new research. Not only could the narrow bands of concentrated water vapour increase, ...

The risk of undersea landslides and their potential to cause tsunamis along New Zealand’s east coast is being investigated by scientists aboard the German research vessel RV Sonne as part of a ...

The ocean and atmosphere remain in a weak La Niña state, primarily focused on the central Pacific (i.e., La Niña “Modoki”). However, there is a 75% chance that ENSO-neutral conditions will emerge ...

Temperature Temperatures were above average (0.51-1.20°C above average) or well above average (>1.20°C above average) for most regions of the country. Temperatures were near average (±0.50°C of ...

Sea life in the seafloor of New Zealand’s most productive and important commercial fishing ground shows resilience to disturbance, according to a new study published in the New Zealand Journal of ...

In February 2025, oceanic and atmospheric conditions remained broadly consistent with a weak La Niña. The ocean and the atmosphere in the tropical Pacific are not strongly nor consistently coupled, ...