Something unusual is happening in the Pacific Ocean.

El Niño is strengthening rapidly, and current forecasts suggest that the 2026–27 event could become one of the strongest in the modern observational record.

The latest NOAA assessment gives a greater than 90% probability of a very strong El Niño during the Northern Hemisphere autumn and winter of 2026–27. It also estimates a 69% probability that the October–December period reaches a RONI of at least +2.5°C — an exceptionally high threshold.

But why does warming water in the Pacific matter to someone in India, Australia, the United States or Africa?

Because El Niño isn't simply an ocean event.

It can influence rainfall, temperatures, agriculture, water availability, energy generation, commodity prices and economic growth across the world.

What is El Niño?

El Niño is the warm phase of the El Niño–Southern Oscillation (ENSO), a recurring climate pattern involving the tropical Pacific Ocean and atmosphere.

Normally, trade winds push warm surface water westward toward Indonesia and Australia. This leaves cooler, nutrient-rich water near the eastern Pacific and South American coast.

During El Niño, those trade winds weaken.

Warm water moves eastward, the eastern and central Pacific warms, and the atmosphere responds. Rainfall patterns shift, atmospheric circulation changes and weather patterns thousands of kilometres away can be affected.

Think of it as a change in the Pacific's climate engine.

And in 2026, that engine is heating up unusually.

The evolution of the current event has been striking.

March 2026: Niño 3.4 ≈ 0°C

↓

May: ≈ +0.9°C

↓

June: ≈ +1.55°C

↓

July: ≈ +1.4°C in Niño 3.4; Niño 1+2 reached ≈ +2.9°C

↓

Late 2026: Forecasts point toward further strengthening.

WMO's seasonal outlook has also indicated rapid development toward a strong El Niño, with models projecting Pacific sea-surface temperature anomalies of around +2°C during the July–September period and further strengthening thereafter.

There is another reason scientists are watching closely: subsurface heat.

Large areas beneath the eastern Pacific surface have become exceptionally warm, with anomalies reportedly reaching around 10°C in some locations. This subsurface heat can provide additional energy for continued surface warming.

In simple terms:

The Pacific may not have reached peak intensity yet.

Why Does El Niño Affect the Entire World?

El Niño doesn't make every region hotter or drier.

Instead, it redistributes heat and moisture through the atmosphere.

That can produce very different consequences in different regions.

Australia & Southeast Asia

El Niño is historically associated with increased drought and heat risk across parts of Australia, Indonesia and Southeast Asia.

Potential consequences include:

• Water shortages

• Agricultural stress

• Wildfires

• Lower hydropower generation

• Extreme heat

  
  

South America

Parts of Peru and Ecuador can experience increased rainfall, flooding and landslides, while other parts of South America may face drought.

Africa

El Niño can alter seasonal rainfall patterns across eastern and southern Africa, with impacts varying significantly by location and season.

North America

El Niño can shift the Pacific jet stream and influence winter precipitation and temperatures, particularly across the southern United States.

The key takeaway is:

One ocean anomaly can create completely different climate risks across different parts of the world.

India: Why the Monsoon Matters

For India, the biggest question is simple:

What happens to the monsoon?

The Indian monsoon provides around 70% of India's annual rainfall, making rainfall variability critically important to agriculture, water supplies and the wider economy.

Historically, El Niño has increased the probability of a weaker Indian monsoon — although it is not a guarantee of drought.

Other climate patterns, particularly the Indian Ocean Dipole (IOD), can modify the outcome.

That makes 2026 particularly interesting.

India's rainfall has already been uneven. Recent reporting indicated that national monsoon rainfall was around 12% below average, while some agricultural states experienced considerably larger deficits. The India Meteorological Department has warned that strengthening El Niño could contribute to further rainfall weakness and higher temperatures.

The potential chain reaction is significant:

Weaker rainfall → crop stress → lower yields → tighter food supply → higher prices → inflationary pressure

But there is an important counterpoint.

India today has stronger food stocks, irrigation, agricultural technology and supply-chain resilience than it did during many historical climate shocks.

So:

El Niño does not automatically mean an Indian food crisis.

The real risk is a compound shock involving rainfall, heat, agriculture, energy demand and food prices simultaneously.

El Niño Is Also an Economic Risk

El Niño can transmit climate shocks into the global economy through agriculture and commodities.

But again, the relationship isn't as simple as:

El Niño = food prices explode.

Global inventories, irrigation, crop diversification and international trade can absorb some shocks.

The bigger concern is simultaneous disruption across multiple climate-sensitive regions.

Research published in Science estimated that the 1982–83 and 1997–98 El Niño events were associated with approximately $4.1 trillion and $5.7 trillion in global income losses, respectively.

That demonstrates why El Niño should increasingly be viewed as more than a weather phenomenon.

It is a systemic economic risk.

What Should We Watch Through 2027?

Five indicators will tell us whether this becomes truly historic.

1. Niño 3.4 / RONI

A sustained move toward +2°C or above would indicate an exceptionally strong event.

2. Subsurface Pacific Heat

Continued accumulation of warm water beneath the surface could fuel further warming.

3. Trade Winds

Persistent weakening would reinforce the ocean-atmosphere feedback driving El Niño.

4. Indian Ocean Dipole

The IOD could significantly modify the effect of El Niño on India's monsoon.

5. Global Temperatures

El Niño can temporarily increase global temperatures by transferring ocean heat into the atmosphere.

Conclusion: The Pacific Is Sending a Warning

The 2026–27 El Niño is no longer just a distant possibility.

It is developing rapidly, and current forecasts indicate a meaningful probability of an exceptionally strong event.

Whether we ultimately call it a “Super El Niño” matters less than what it tells us about the world we are entering.

Climate risks are increasingly interconnected.

The future challenge isn't simply reducing emissions.

It is building systems — food, energy, water, infrastructure and economies — that can remain resilient when climate variability becomes more disruptive.

The Pacific may be thousands of kilometres away.

Its consequences are not.