Eastern Australia Faces a Hotter, Drier Stretch as El Niño Warnings Tighten
Australia is bracing for a likely El Niño event, with forecasters now largely in agreement that the climate pattern will take hold in the coming months. The Bureau of Meteorology, along with international agencies, has signaled that conditions are aligning for a shift from the current neutral phase.
Senior BoM climatologist Felicity Gamble said the models have converged. “We are expecting a transition to El Niño sometime during winter,” she noted. The World Meteorological Organization puts the odds at 90% that an El Niño will develop in the Pacific before November.
El Niño is the warm side of the El Niño-Southern Oscillation. It happens when sea surface temperatures in the central equatorial Pacific rise above normal, altering atmospheric circulation. For Australia, that typically means less rain over the north and a greater chance of hot, dry weather across the east and south.
Gamble stressed that while the models point to at least a moderate event—possibly strong—the strength doesn’t guarantee severe impacts locally. Other influences, like the Indian Ocean dipole and the southern annular mode, also play a role.
Historically, El Niño has been linked to drought, heatwaves, bushfires, and coral bleaching. In eastern Australia, nine of the ten driest winter-spring periods on record have occurred during El Niño years. But Gamble cautioned that the shift isn’t instant. “It’s a more nuanced story,” she said. “Recent conditions matter.”
Dr. Andrew Watkins, a former BoM climate chief now with the Climate Council, described the combination of El Niño and climate change as a dangerous double act. “Climate change is already pushing us toward more drought, more bushfire weather, and more extreme heat,” he said. “It reinforces some of these El Niño effects.”
Watkins added that while El Niño’s influence is strongest in winter and spring, it tends to fade by summer—unlike its counterpart, La Niña.
Globally, El Niño can trigger heavy rain and floods in the southern U.S. and Central America, and weaken monsoons in India.