Australia's Bureau of Meteorology confirmed on Tuesday morning that El Niño is officially active in the tropical Pacific. The BOM's statement that forecasts are pointing toward "a strong to very strong El Niño event" - with around half of models indicating a peak among the highest observed since 1950 - is not a surprise to anyone watching the Pacific climate indicators. It is, however, the formal starting gun for a second half of the year that the Australian insurance market should approach with heightened caution.
Australia's insurance industry has been monitoring the potential return of El Niño since early this year, with the ICA reporting 2025 extreme weather insured losses of $3.49 billion - compared with just $581 million in 2024, illustrating the year-to-year volatility that makes pricing, capital management and reinsurance planning so challenging. The BOM's declaration moves the risk from a probability to a reality.
Historically, approximately 40% of Australia's bushfire losses occur during El Niño periods, when conditions are hotter, drier and more settled, according to Aon research. The early part of 2026 has already demonstrated what that looks like in practice. The January 2026 Victorian bushfires - described by Risk Frontiers as the most dangerous conditions since the 2019–20 Black Summer - generated more than 4,700 claims, with cumulative recovery funding reaching more than $420 million. Those fires occurred before El Niño had even been formally declared.
NRMA Insurance research published last week found that 42% of Australians do not feel prepared for a bushfire, and just 6% give any thought to fire preparation during winter months- despite one in four having directly experienced a fire near their home. The dry conditions suppressing storm claims in autumn are the same conditions loading fuel moisture for winter and spring fires. APRA's March 2026 Insurance Climate Vulnerability Assessment stress-tested how Australia's home insurance protection gap could change by 2050 under continued extreme weather. El Niño is a preview of that scenario, not a distant prospect.
The BOM's ACCESS-S model is projecting peak Pacific warming in excess of 3°C above normal - a post-1900 record, comfortably above the previous high of 2.65°C from November 1902. The rate of warming in the Niño3.4 monitoring zone is already the fastest since 1943. ENSO accounts for up to 40% of precipitation variability across eastern Australia from September to November, according to climate scientists. Nine of the ten driest winter-spring periods on record in eastern Australia occurred during El Niño years. For insurers seeking to integrate the outlook into pricing, accumulation controls and reinsurance programs, the uncertainty is not whether conditions will deteriorate - it is how severely, and how soon.
