Strong El Niño Likely This Year: What It Means for Global Weather & Temperatures

A potentially strong El Niño weather pattern is increasingly likely to develop this summer and extend through the remainder of the year, according to the latest forecast from the National Oceanic and Atmospheric Administration (NOAA). This development could bring a complex array of global weather impacts, from increased temperatures to altered rainfall patterns, building on a period of record-breaking heat already experienced in 2023 and 2024.

Forecasters estimate a 62% chance of El Niño emerging between June and August. El Niño is a natural climate pattern characterized by warmer-than-average sea surface temperatures in the central and eastern tropical Pacific Ocean. This warming disrupts normal atmospheric circulation, leading to significant shifts in weather worldwide. The phenomenon occurs when trade winds weaken, allowing warm ocean water to surge eastward toward the Americas.

Understanding the Potential Scale of the Event

While El Niño events occur regularly, climate scientist Daniel Swain, with the University of California Agriculture and Natural Resources, suggests this particular event could be a significant one, potentially lingering into 2027. The scale of this potential event is noteworthy, given the backdrop of ongoing global warming driven by human activity. Even without El Niño, 2023 and 2024 were the warmest years on record, and the added heat from El Niño is expected to further exacerbate these trends.

El Niño’s primary function within the global climate system is to release heat stored in the deeper oceans. As Swain explains, it “allows that subducted heat to be unearthed.” This release of heat contributes to rising average global temperatures. The hottest years on record typically coincide with active El Niño phases.

Global Temperature Impacts and Recent Records

The impact on global temperatures is already evident. 2023 broke the record for the hottest year ever recorded, a record that was then surpassed in 2024. Zeke Hausfather, a research scientist at Berkeley Earth and climate research lead at Stripe, anticipates that a strong El Niño will contribute to a further temperature increase in 2026, potentially making 2027 the warmest year on record. It’s crucial to remember, however, that El Niño is just one factor influencing global temperatures; human-caused climate change remains the dominant driver of long-term warming.

Regional Weather Shifts: A Mixed Bag

The effects of El Niño aren’t uniform across the globe. The pattern triggers a cascade of regional weather changes. In the Southern United States, El Niño often brings increased rainfall and cooler temperatures, which can be beneficial in mitigating droughts and reducing wildfire risk. However, the situation in the Southwestern United States is more complex. A severe, long-standing drought in the region means that a single wetter year won’t be enough to fully replenish depleted reservoirs, according to a recent analysis by the National Integrated Drought Information System.

Conversely, El Niño can exacerbate drought conditions in other parts of the world. In the Atlantic Ocean, El Niño tends to suppress hurricane formation, leading to less severe hurricane seasons. However, this protection is not absolute. A single major storm can still cause catastrophic damage, and rising ocean temperatures, fueled by climate change, are providing more energy for storms that do develop. El Niño has little impact on storms forming in the Pacific Ocean.

Beyond Temperature: Storms, Rainfall, and Wildfires

Swain emphasizes that the regional weather patterns associated with El Niño are perhaps its most dangerous effects. These include increased heat waves, heavier rainfall events, more intense droughts, and a heightened risk of wildfires. The increased energy in the climate system, unleashed by El Niño, amplifies these extreme weather events.

El Niño and Atlantic Hurricane Season

The relationship between El Niño and Atlantic hurricane activity is well-documented. Increased wind shear – changes in wind speed and direction with altitude – over the Atlantic basin, a common feature during El Niño years, tears apart developing tropical cyclones. This typically results in fewer hurricanes and tropical storms. However, as noted, warmer ocean temperatures can offset some of this suppressing effect, and the overall trend of increasing ocean heat content remains a significant concern.

The Role of Ongoing Climate Change

It’s vital to understand that El Niño operates within the context of a rapidly warming planet. Human activities, primarily the burning of fossil fuels, are driving long-term climate change, and this warming trend is superimposed on the natural variability caused by phenomena like El Niño. Even without El Niño, 2025 was among the hottest years on record, demonstrating the pervasive influence of human-caused warming. Recent data confirms this continuing trend.

Looking Ahead: Monitoring and Adaptation

The NOAA’s forecast will be regularly updated as the year progresses, providing more refined predictions about the strength and duration of the El Niño event. Ongoing monitoring of sea surface temperatures, atmospheric conditions, and global weather patterns is crucial for understanding the evolving situation. Public health officials and emergency management agencies are preparing for the potential impacts of El Niño, focusing on strategies to mitigate risks associated with extreme weather events. This includes strengthening infrastructure, improving early warning systems, and enhancing community preparedness.

The interplay between El Niño and long-term climate change underscores the urgency of reducing greenhouse gas emissions. Addressing the root causes of climate change is essential for limiting the severity of future El Niño events and minimizing their impacts on communities around the world.

For the latest official updates and guidance, please refer to the NOAA Climate Prediction Center: https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso_advisory/