The advisory stated “La Niña conditions are present and favored to persist through December 2025 – February 2026, with a transition to ENSO-neutral likely in January-March 2026.”

And it could be set to affect Australian weather.

“Moderate-to-strong La Niña events that occur during late spring and early summer typically enhance cloud and rainfall and suppress daytime temperatures over large areas of Australia, particularly northern, central and eastern parts of the country,” Weatherzone said.

“However, the influence of weak or borderline La Niña episodes is less predictable.”

But while Weatherzone experts say a La Niña-like pattern has become established in the Pacific Ocean in recent weeks, its expected to be short-lived and relatively weak.

That means it may not have a strong influence on Australia’s weather in the coming months.

Other climate drivers are expected to have a bigger effect, including abnormally warm sea surface temperatures closer to Australia

Climate change and the rapid warming of oceans has forced the Bureau of Meteorology to revise its analysis for the two major weather patterns: El Nino and La Nina.

The former brings warmer conditions while La Niña leads to increased cloud and rain.

Both weather patterns are influenced by sea temperatures in the tropical Pacific Ocean.

La Niña is a natural climate pattern marked by cooler than average water temperatures in the equatorial Pacific that also leads to changes in upper atmosphere patterns — together, these influence weather globally.

Forecasters closely monitor La Niña and its counterpart El Niño because they influence weather in a way that’s largely consistent and predictable well in advance, especially when the patterns are strong.

They exert the most influence during winter in the Northern Hemisphere, but that sway fades during other seasons, allowing other atmospheric influences to seep in.

The upcoming La Nina looks to be on the weaker end of the spectrum, which could also affect how clear-cut its influence becomes.