Why a super El Niño event poses fresh risks to food costs

An unusually powerful El Niño later this year could exacerbate food security fears as disruption caused by the Iran war strains supply for crucial fertilizer products.

Climate scientists warn it appears increasingly likely that a planet-warming El Niño will take shape over the coming months, with U.S. meteorologists estimating a one-in-three chance of a “strong” weather event forming in October to December.

European climate models indicate an even higher probability of a very strong or “super El Niño,” although the so-called spring barrier means that these forecasts can be inaccurate.

El Niño — or “the little boy” in Spanish — is widely recognized as the warming of the sea surface temperature, which occurs naturally every few years. Such an event is declared when sea temperatures in the tropical eastern Pacific rise 0.5 degrees Celsius above the long-term average.

A super El Niño, which doesn’t have an official scientific category, is understood to refer to an exceptionally strong phase of the El Niño Southern Oscillation (ENSO), when sea surface temperatures in the eastern Pacific rise at least 2 degrees Celsius above normal.

Chris Jaccarini, senior analyst, food and farming at the Energy and Climate Intelligence Unit, said 2026 was shaping up to be another year in which conflict and climate risks have become a costly reality.

“Food prices are being squeezed from both sides: by climate extremes disrupting production in major growing regions, and by a food system still hooked on fossil fuels and therefore exposed to spikes in gas, fertiliser, transport and packaging costs,” Jaccarini told CNBC by email.

“That is why the prospect of a strong El Niño matters,” he continued. “It can turbocharge weather risks in a climate already destabilised by human emissions, compounding inflation driven by high fossil fuel prices.”

Some commodities are particularly exposed to the weather event, with El Niño typically putting upward pressure on cocoa, food oils, rice and sugar, Jaccarini said. He also cited broader risks for other products linked to the tropics, such as bananas, tea, coffee, chocolate and soy-fed meat.

Expectations of El Niño’s return follow a multi-year La Niña event, which generally has the effect of lowering global temperatures compared to normal years.

Oil and gas prices and fertilizer costs have skyrocketed due to the Iran war severely disrupting supplies through the strategically vital Strait of Hormuz, a narrow waterway connecting the Persian Gulf and the Gulf of Oman.

Roughly one-third of the world’s seaborne fertilizer trade typically passes through…