What is a super El Niño and how does it affect global weather records?

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1. 1

   2026–2027 El Niño event (Wikipedia)

   WikipediaPublished Oct 14, 2026Checked Oct 14, 2026

   “The 2026–2027 El Niño is the ongoing El Niño event, with its onset declared on 2 June 2026 by the World Meteorological Organization (WMO). It is the strongest El Niño ever measured for its time of year, and the World Meteorological Organization has reported that it will likely be the strongest El Niño on record, with it already being classified as a "very strong El Niño", also known as a Super El Niño. The 2026–2027 El Niño is expected to peak in November or December and last through early 2027.”

2. 2

   El Niño–Southern Oscillation (Wikipedia)

   WikipediaPublished Oct 14, 2026Checked Oct 14, 2026

   “El Niño–Southern Oscillation (ENSO) is a global climate phenomenon that emerges from variation in winds and sea surface temperatures over the tropical Pacific Ocean. Those variations have an irregular pattern, but do have some appearance of cycles. The occurrence of ENSO is not easily predictable. It affects the climate of much of the tropics and subtropics, and has links (teleconnections) to higher-latitude regions of the world. The warming phase of the sea surface temperature is known as "El Niño" and the cooling phase as "La Niña". The Southern Oscillation is the accompanying atmospheric oscillation, which is coupled with the sea temperature change. El Niño is associated with higher than normal sea level air pressure over Indonesia and Australia, and across the Indian Ocean to the Atlantic Ocean. La Niña has roughly the reverse pattern: high pressure over the central and eastern Pacific and lower pressure through much of the rest of the tropics and subtropics. The two phenomena typically last approximately one year each and typically occur every two to seven years with varying intensity, with neutral periods of lower intensity interspersed.”

3. 3

   An eastward-propagating coupled mode amplifying the early growth of extreme El Niño events.

   Science advances (Liang et al.)Published Sep 23, 2026Checked Oct 14, 2026

   “Extreme El Niño events are among the most consequential climate phenomena, yet their early prediction remains challenging. Here, by analyzing the 1982/1983, 1997/1998, and 2015/2016 events together with a large ensemble of climate model simulations, we identify an unusually early and reproducible ocean-atmosphere precursor to extreme El Niño: a slow, eastward-propagating coupled mode that develops in the western-central equatorial Pacific during boreal winter and spring. This mode features warm sea surface temperature anomalies coupled with sustained westerly wind anomalies. These westerly wind anomalies drive the equatorward transport of warm water, rapidly increasing equatorial ocean heat content and priming extreme El Niño growth in the following summer and fall. Ensemble hindcasts further reveal that East Asian cold surges and the North Pacific Oscillation can stochastically excite this equatorial mode, enabling skillful forecasts of extreme events as early as February and helping to overcome the spring predictability barrier.”

4. 4

   2024 global temperature record is consistent with model-predicted warming.

   Proceedings of the National Academy of Sciences of the United States of America (Mann et al.)Published May 11, 2026Checked Oct 14, 2026

   “We employ a semiempirical approach combining climate model simulations and observational temperatures to assess the likelihood of recent global temperature records. Monte Carlo simulations are used to generate global temperature series consistent with combined estimates of forced (anthropogenic + natural) and internal variability derived from observations and CMIP6 multimodel simulations. We find that the El Niño-boosted 2024 global temperature record had a ~12% likelihood of occurrence (a one-in-eight-year event), similar to the prior (also El Niño-boosted) record year 2016 (~14% likelihood). Of the records set during the past three decades, only 1998 is found to have been truly anomalous, with a ~2.5% likelihood of occurrence. Each of these records is found to have been nearly impossible in the absence of human-caused warming.”

5. 5

   Synergies Between Observed Warming and ENSO Episodes on Extreme Events.

   Annals of the New York Academy of Sciences (Estrada et al.)Published Nov 4, 2025Checked Oct 14, 2026

   “Past events illustrate the severe societal consequences this phenomenon has through weather disasters, food security, health, economic growth, migration, and conflict. ENSO's interactions with global warming are not well understood, although they can lead to significant changes in the characteristics of extreme events. Climate conditions in 2024/2025 may favor widespread severe extreme events with global temperature anomalies nearing or surpassing 1.5°C and a transition from strong El Niño to La Niña conditions. Here, we show that current warming has amplified the effects of ENSO on temperature and precipitation extremes worldwide. Results show that warming has produced a considerable amplification of the effects of ENSO episodes over such extremes, as well as extensively modified spatial patterns. We show that considerable shares of the population, gross domestic product, agriculture, and ecosystems now face a higher risk from extreme events due to the interactions between increased anthropogenic forcing and ENSO.”

6. 6

   Super El Niño sets another record as it strengthens to 'unprecedented levels'

   BBC NewsPublished Oct 13, 2026Checked Oct 14, 2026

   “El Niño has continued to strengthen, with several key measures now in record territory. Simon King explores how it compares to previous events.”