Source: Earth Sciences New Zealand
Highlights:
– La Niña conditions are favoured during the spring and early summer 2025-26, with a 60% chance of emergence from September – November
– Alternating periods of settled weather and northeasterly flow anomalies will occur in October and November
– Temperatures are equally likely to be near or above average for all New Zealand, except the west of the South Island, where above average temperatures are most likely
– Rainfall will be near or above normal for the north and east of the North Island and the north of the South Island, near normal for the west of the North Island, and near normal or normal for the west and east of the South Island
– Above average sea surface temperatures are expected to continue around New Zealand through spring.
