A broad belt of unusually warm water is gradually growing across the equatorial Pacific. It may appear distant from Britain, Africa or South America, but the atmosphere does not respect continental boundaries. Ultimately, changes over this ocean can redirect rainfall, disturb storm tracks and carry additional heat around the planet like never before.
The developing Super El Niño of 2026 is already getting in the news due to its exceptional projected strength. Eventually, if current forces hold, its effects could extend through the coming winter and well into 2027.
The Pacific Is Sending an Exceptional Signal
El Niño begins when the trade winds that normally push warm surface water towards Asia weaken. Consequently, warm water then spreads eastwards across the central and eastern Pacific. Tropical rainfall moves with it, changing air pressure and atmospheric circulation far beyond the ocean itself.
This cycle usually occurs every two to seven years, but its intensity varies. Some events produce modest regional changes. On the other hand, powerful ones can influence drought, flooding, heat, agriculture and tropical storms across much of the world.
The World Meteorological Organization expects sea-surface temperature anomalies to exceed 2.9°C in important monitoring areas during the August–October period. The UK Met Office also believes the warming could peak above 3°C later in 2026. A rise of 1°C is already significant, while 2°C normally indicates a major event.
Could This Become a Historic El Niño?
There is a greater than 90% chance of a very strong El Niño during the Northern Hemisphere autumn and winter of 2026–27. Its latest model gives the October–December period a 69% probability of exceeding previous events in records dating back to 1950.
Those figures clearly explain the term “super El Niño,” although it is an informal description rather than a separate scientific category. Since the event is still developing, it should not yet be described as the strongest ever recorded.
Its expected duration is equally important. El Niño may persist through the Northern Hemisphere spring of 2027. This means its consequences could continue long after Pacific temperatures reach their highest point.
Britain Could Move from Drought to Storms
Weather analysis has identified signals for increased UK rainfall and storminess during autumn, particularly around November. That would follow an exceptionally dry summer.
July was reportedly Britain’s driest in approximately 190 years. Around 71.3% of England, together with all of Wales, entered drought. Reservoir storage across England fell to only 63%, which was 16 percentage points below the seasonal average. Moreover, seven reservoirs were classified as having exceptionally low storage.
Although a wet spell would bring relief, it would not erase the drought immediately. Dry soils may initially struggle to absorb intense rainfall, increasing surface runoff. Rivers, groundwater, and reservoirs also require sustained precipitation over weeks or months before they recover fully.
One Ocean Could Produce Opposite Extremes
El Niño does not make every region warmer, wetter, or drier at once. It redistributes weather risk by shifting tropical rainfall and influencing major wind patterns.
Current forecasts indicate several contrasting possibilities:
- North-western Europe may experience wetter and stormier periods
- Southern Africa faces an increased threat of drought and crop stress
- North-east Australia could encounter hotter and drier conditions
- Indonesia and parts of the western Pacific may receive less rainfall, increasing water and wildfire concerns
- Parts of South America could suffer severe drought, while Peru and sections of the Pacific coast may experience destructive rain
- The southern United States may develop a wetter and more active winter storm track
However, local geography and other ocean patterns can strengthen, weaken, or redirect the expected effects.
The Largest Heat Pulse May Arrive in 2027
Strong El Niño events transfer additional heat from the ocean into the atmosphere. The clearest rise in global temperature often occurs during the calendar year after El Niño reaches its winter peak.
Unfortunately, the Met Office considers it very likely that 2027 will replace 2024 as the warmest year recorded. Global temperature could again move temporarily beyond 1.5°C above the pre-industrial average. Some scientists believe the annual anomaly could approach 1.7°C.
El Niño does not create long-term climate change. It is a natural cycle working on top of decades of human-caused warming. That higher baseline allows its temporary heat pulse to push global temperatures further.
The Consequences Will Reach Farms and Kitchens
The importance of El Niño cannot be measured by temperature alone. Drought can reduce harvests of rice, maize, coffee and cocoa. Excessive rain can destroy crops, roads and storage facilities. Warm Pacific water may disrupt fisheries, while low reservoirs can affect drinking supplies and hydropower.
Other possible consequences are as follows:
- Greater wildfire danger in dry regions
- Pressure on food prices and rural incomes
- Reduced river transport and energy (electricity) generation
- Damage to coral reefs during marine heatwaves
- Growing demand for humanitarian assistance
In this context, the United Nations has warned that El Niño-related conditions could push up to 50 million people into acute hunger by the end of 2027. Communities already facing poverty, conflict or water shortages will carry the greatest burden.
