Full Breakdown
Potential Return of El Niño in 2026: Implications for Global Temperatures
3/2/2026, 9:34:33 PM
Overview of El Niño and Its Effects
The El Niño weather phenomenon, characterized by warmer ocean temperatures in the central and eastern tropical Pacific, is projected to potentially develop later this year. The U.S. National Oceanic and Atmospheric Administration (NOAA) estimates a 50% to 60% chance of El Niño forming between July and September 2026. This event could significantly impact global temperatures, possibly leading to record highs.
El Niño operates within a natural climate pattern known as the El Niño-Southern Oscillation (ENSO), which also includes its counterpart, La Niña. The term "El Niño," meaning "the boy" or "the Christ Child," was coined by fishermen in Peru and Ecuador in the 19th century to describe a warm ocean current that disrupted their fishing activities around Christmas. Conversely, La Niña represents the cooler phase of this oscillation.
Recent Historical Context
The last occurrence of El Niño was during the 2023-2024 period, contributing to 2023 being the second hottest year on record and 2024 potentially setting a new record. Climate scientists, including Carlo Buontempo from the European Union's Copernicus Climate Change Service, have indicated that if El Niño develops this year, 2026 could also be a record-breaking year. However, Tido Semmler, a climate scientist at Ireland's National Meteorological Service, noted that the effects of El Niño would likely be more pronounced in 2027, as the global atmosphere requires time to respond to the phenomenon.
Impacts of El Niño and La Niña
El Niño typically leads to drier conditions in regions such as Southeast Asia, Australia, and parts of southern Africa, while causing wetter conditions in the southern United States and the Horn of Africa. In contrast, La Niña, which was last observed from December 2024, tends to cool the eastern Pacific and generate opposite weather effects, including increased rainfall in Australia and Southeast Asia.
Despite the cooling effects of La Niña, 2025 was still recorded as the third hottest year globally, highlighting the overarching trend of rising temperatures due to climate change.
Methodological Changes in Monitoring
NOAA has recently updated its methodology for determining El Niño and La Niña events. The new Relative Oceanic Niño Index (RONI) replaces the previous Oceanic Niño Index, which relied on outdated 30-year averages. RONI provides a more accurate and timely assessment of ocean temperature variations, enhancing the ability to track these significant climate phenomena.
Official Statements and Future Projections
The World Meteorological Organization is expected to release an update on El Niño, which will provide further insights into its potential development and implications. As the climate continues to warm, experts warn that even without El Niño, 2026 could still be at risk of becoming the warmest year on record due to ongoing global warming trends.
Conflicting Reports & Gaps
While there is consensus on the potential for El Niño to develop, opinions differ on the timing and impact of its effects. Some experts suggest that the most significant warming may not occur until 2027, indicating a need for ongoing monitoring and research to fully understand the implications of these climate patterns.
Verbatim Quotes
- “It takes time for the global atmosphere to react to the El Niño,” — Tido Semmler, Climate Scientist, Ireland's National Meteorological Service
- “Carlo Buontempo, director of the European Union's Copernicus Climate Change Service, said in January that 2026 could be "another record-breaking year" if El Niño appears this year.” — Carlo Buontempo, Director, European Union's Copernicus Climate Change Service
