Record March Heat and Rising Sea Temperatures Point to Possible El Niño

Global climate indicators showed alarming trends in March 2026, with rising temperatures and near-record sea surface heat suggesting the possible return of El Niño conditions in the coming months.

According to the Copernicus Climate Change Service, March 2026 was the fourth-warmest on record globally, with temperatures reaching about 1.48°C above pre-industrial levels.

Meanwhile, the National Oceanic and Atmospheric Administration (NOAA) reported similarly elevated figures, noting that recent years dominate the list of the warmest March temperatures since 1850.

Global sea surface temperatures (SSTs) averaged around 20.97°C, making it the second-highest ever recorded after the peak seen during 2024’s El Niño phase. Scientists say these rising ocean temperatures are a strong indicator of a developing El Niño event, possibly beginning around mid-2026.

Forecasts suggest a transition from neutral conditions to El Niño between May and July, with high probability of continuation into late summer.

Another worrying sign came from the Arctic, where sea ice levels in March were about 5.7% below average—the lowest ever recorded for the month.

Several regions experienced unusual weather patterns:

• Europe recorded its second-warmest March
• Parts of the United States saw prolonged heatwaves
• Warmer-than-normal conditions extended across the Arctic and parts of Russia
• Cooler temperatures were observed in parts of Canada and Greenland

Climate experts say the combination of rising global temperatures and a potential El Niño could intensify extreme weather events such as heatwaves.

Former Earth Sciences Secretary M Rajeevan warned that increasing greenhouse gas emissions continue to drive global warming, adding that an El Niño event could further amplify heat across the planet.

NOAA projections indicate a strong likelihood that 2026 will rank among the five warmest years on record. Scientists stress that such data highlights the urgent need for climate action and better adaptation strategies.