The return of El Niño is expected to bring gradual shifts in seasonal weather patterns, including stronger westerly winds and unsettled conditions for the South Island.
Climate scientists clarify that El Niño's influence on New Zealand is historically weaker and less predictable than its severe impacts in tropical Pacific regions.
Other atmospheric factors, such as the Indian Ocean Dipole and high ocean temperatures, are playing a critical role in steering current weather trends alongside El Niño.
Historically, strong El Niño events have been linked to drier eastern conditions and potential drought risks, impacting agriculture and hydro-power generation.