La Niña has now given way to ENSO-neutral conditions, and there is an 80% chance that ENSO-neutral conditions will continue during May-July 2025. As of 21 April, the 30-day NINO3.4 Index (in the ...

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 ...

State Owned Enterprises Minister Simeon Brown and Science, Innovation and Technology Minister Shane Reti today jointly announced that Cabinet has agreed to proceed with NIWA’s acquisition of ...

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, ...

Rainfall Below normal rainfall (50-79% of normal) or well below normal rainfall (<50% of normal) was observed across much of the North Island, and northern, western and inland parts of the South ...

NIWA is leading a voyage (TAN2206), between 9th April and 6th May 2022 to Hunga Tonga - Hunga Ha’apai (HT-HH) volcano within the Kingdom of Tonga. Subsequent to a recent eruption at HT-HH, this voyage ...