El Niño Might Return Later in 2026, Climate Agencies Update Forecasts
El Niño could make a comeback later this year, according to recent updates from major climate agencies that closely monitor the tropical Pacific. The latest observations indicate that the ongoing La Niña event is weakening as sea surface temperatures in the central Pacific rise and approach neutral levels.
La Niña Shows Signs of Easing in the Tropical Pacific
The La Niña event from 2025 to 2026 has lost strength in recent weeks. Ocean temperatures in the Niño 3.4 region have remained just below the La Niña threshold, while subsurface waters are warming—a typical indicator that the event is fading. Atmospheric signals are mixed, with trade winds slightly stronger than average in parts of the Pacific and cloud patterns near the Date Line below normal. The Southern Oscillation Index stays positive, though short-term tropical systems can skew readings during summer.
Both the Australian Bureau of Meteorology and the NOAA Climate Prediction Center forecast that neutral ENSO conditions are likely to emerge between February and April 2026. These neutral conditions are expected to persist through the Northern Hemisphere summer, marking a significant shift in Pacific climate dynamics.
Models Indicate a Possible El Niño Later in 2026
Beyond mid-year, outlooks diverge, but several models suggest a 50% to 60% chance of El Niño forming during late summer or autumn. Forecasters caution that long-range ENSO predictions are less reliable at this time due to the seasonal predictability barrier. However, a transition from La Niña to El Niño would represent a notable change in Pacific climate patterns, as the El Niño Southern Oscillation cycles between warm, cool, and neutral phases, each altering global rainfall, storm tracks, and temperature patterns.
El Niño Tends to Lift Global Temperatures
El Niño events typically add a small but measurable increase to global average temperatures, often around 0.1 to 0.2 degrees Celsius. In a warming climate, this additional heat can push annual averages to new highs. Recent years have already ranked among the warmest on record, and without La Niña's cooling effect, combined with a potential El Niño boost, 2026 or 2027 could see further temperature records challenged.
Weather impacts vary by region:
- Southern parts of the United States and southern Europe often experience wetter conditions.
- Northern North America can become warmer and drier.
- In the Atlantic, hurricane activity typically decreases, while the central and eastern Pacific may become more active.
For now, the Pacific is in transition, with neutral conditions expected first. What follows remains uncertain, but climate agencies are closely monitoring the signals for any developments.
