Global climate patterns are entering a critical transition phase, with above-average sea-surface temperatures (SSTs) dominating much of the world’s oceans and forecasts pointing to a rapid shift toward El Niño conditions by mid-2026, according to the latest seasonal outlook.
The findings highlight growing risks of extreme heat, shifting rainfall patterns, and climate variability across multiple regions in the coming months.
Warmer Oceans Dominate, Except Pacific Cooling Zone
Between December 2025 and February 2026, global oceans remained largely warmer than average, with one key exception:
However, scientists note that ocean–atmosphere interactions were stronger than expected, producing climate signals typically associated with a more intense event.
Elsewhere:
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Extratropical oceans in both hemispheres remained warm
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The Atlantic Ocean recorded slightly above-average temperatures
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The Indian Ocean Dipole (IOD) remained neutral
El Niño Likely to Develop Rapidly by Mid-2026
Forecast models show an unusually strong agreement that the current conditions will quickly transition into El Niño:
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Transition expected by May 2026
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Potential for a strong El Niño by June–July
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High confidence despite the typical spring predictability barrier
At the same time, the Indian Ocean Dipole is projected to shift toward a positive phase, which can further influence rainfall and temperature patterns across Africa, Asia, and Australia.
Global Heat Signal Strengthening
For the April–June 2026 season, forecasts indicate a widespread increase in temperatures:
Key regional trends include:
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Southern North America, Central America, Caribbean: Strong warming signal
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Europe and North Africa: Moderate to high probability of above-normal heat
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Equatorial Africa and Maritime Continent: Strong tropical warming
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South America: Widespread above-normal temperatures
In contrast, northern Asia and northern North America show weaker and less certain warming signals.
Ocean Temperatures Also Rising
Ocean forecasts indicate continued warming across:
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North and South Pacific
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South Atlantic
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Western North Atlantic
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Equatorial Indian Ocean
The eastern equatorial Pacific is expected to warm significantly as El Niño develops.
Rainfall Patterns Shift with Emerging El Niño
Rainfall forecasts for April–June 2026 show strong influence from the developing El Niño:
Wet Zones (Above-Normal Rainfall):
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Equatorial Pacific (strong signal exceeding 70–80% probability)
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Equatorial Africa extending into the Arabian Peninsula
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Northwestern South America
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Parts of Central America
Dry Zones (Below-Normal Rainfall):
Europe shows a slight tendency toward wetter conditions, while northern regions of North America show no clear signal.
Climate System at a Turning Point
The combination of:
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Rapid El Niño development
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Positive Indian Ocean Dipole shift
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Persistently warm global oceans
suggests that the coming months could bring heightened climate variability, including:
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Increased risk of heatwaves
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Shifts in monsoon and rainfall patterns
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Potential impacts on agriculture, water resources, and disaster risk
Implications for Global Planning
The high level of agreement among climate models provides an important window for governments and sectors to prepare for likely impacts.
As the climate system transitions from La Niña to El Niño, the global outlook underscores the importance of early warning systems, climate resilience planning, and adaptive strategies.