World oceans record hottest June ever as El Niño and climate change drive more heat

The world’s oceans are the hottest on record for June, pushing past records set during the 2023–24 El Niño years

The world's oceans are the hottest on record for June, pushing past records set during the 2023–24 El Niño years.

El Nino is set to turn up the heat even more; the oceans are getting rapidly warmer.

The El Niño forming in the tropical Pacific right now is likely to be a big one. As it develops, we can expect to see warmer temperatures and extreme events such as marine heatwaves in the western Indian, tropical Atlantic and eastern Pacific Oceans

Right now, the average sea surface temperature is just under 21 degrees Celsius across the world's tropical and temperate oceans.

Global sea surface temperatures reached record highs for June as a newly declared El Niño hit the Pacific Ocean, prompting concerns over extreme weather, flooding, sea level rise and stress to global ocean ecosystems.

The world’s oceans are the hottest on record for June, pushing past records set during the 2023–24 El Niño years

More than 90% of the heat trapped by greenhouses goes into the ocean. But what happens in the oceans doesn’t stay there.

Oceans worldwide recorded their hottest June ever, with global average sea surface temperatures reaching 20.98°C. Scientists warn that the developing El Nino phenomenon, coupled with ongoing climate change, could push ocean and atmospheric heat to new peaks in the coming months and into next year. This alarming trend highlights the escalating impact of global warming on marine environments.

The oceans have never been warmer. They hit a record 21 degrees celcius average surface temperature in June, logged by Copernicus, the EU's Earth-observation programme. It's clearly taking a toll on biodiversity around the world, after years of warnings from experts. The onset of a potentially powerful El Nino weather pattern could boost global heat in the oceans and atmosphere even further in 2026 and into next year.

The world's oceans reached their hottest June on record, scientists said on Wednesday, with sea temperatures expected to climb further as El Nino develops alongside human-driven climate change.

Global average sea surface temperatures in June were 20.98C, beating the previous records of 2023 and 2024, according to the European Union's Copernicus Marine Service.

The world's oceans just experienced their hottest June on record and could set fresh highs in the months ahead as El Niño and climate change drive temperatures even higher, scientists said Wednesday.

Scientists said the onset of a potentially powerful El Nino weather pattern could boost global heat in the oceans and atmosphere even further in 2026

Global average sea surface temperatures in June were 20.98C, beating the previous records of 2023 and 2024.

European Union monitors say the first half of 2026 was 'marked by sustained and exceptional ocean warmth'.

The world's oceans recorded their hottest June ever, European scientists said on Wednesday, warning that the emergence of an El Niño weather pattern alongside human-driven climate change could push sea and air temperatures to fresh records in the months ahead.

The world's oceans experienced their hottest June on record and could set fresh highs in the months ahead as El Niño and climate change drive temperatures even higher, scientists have said.

The world's oceans just experienced their hottest June on record and could set fresh highs in the months ahead as El Niño and climate change drive temperatures even higher, scientists have said.

Global average sea surface temperatures in June were 20.98°C, beating the previous records set in 2023 and 2024.

PARIS, France (AFP) — The world's oceans just experienced their hottest June on record and could set fresh highs in the months ahead as El Niño and climate change drive temperatures even higher, scientists said Wednesday. Global average sea surface temperatures in June were 20.98C, beating the previous records of 2023 and 2024, according to the European Union's Copernicus Marine Service. The record capped six months of near unprecedented ocean warmth in 2026, with prolonged marine heatwaves, the service said. Average sea temperatures in the first half of the year were 20.04C, slightly below the high set in the same period in 2024. And scientists said the onset of a potentially powerful El Niño weather pattern could boost global heat in the oceans and atmosphere even further in 2026 and into next year. "Current conditions could indicate the beginning of a new phase, leading, once more, to uncharted territory," said Carlo Buontempo, director of Copernicus Climate Change Service, the EU's climate monitor. "With ocean temperatures at these levels and El Niño on the horizon, we are likely to see more temperature records fall in the coming months," Buontempo said in a statement. El Nino is marked by unusually warm waters in parts of the Pacific Ocean, releasing more heat into the atmosphere and influencing wind, cloud and weather patterns around the globe. This can raise the risk of weather extremes ranging from floods in Peru to droughts in parts of Africa and wildfires in Australia. But it can also cause a temporary spike in global temperatures, compounding the long-term warming caused by humanity's burning of fossil fuels. Land and sea temperatures reached an all-time high in 2024 at the tail end of the last El Niño. "With the arrival and the onset of an El Nino year ... we can expect that 2026 will be amongst the warmest (ever) recorded," Simon Van Gennip, lead Oceanographer for the Copernicus Marine Service, said in a news briefing. "This is due to El Nino ... but also from the warming due to the greenhouse gas emissions we continue to provide for the atmosphere," Van Gennip said. The report follows a warning issued in a major UN scientific assessment last month which declared that the world's oceans were in a "deepening crisis" as seas were warming and rising faster. Oceans are a key regulator of Earth's climate because they absorb some 90 per cent of the excess heat caused by humanity's release of greenhouse gases such as carbon dioxide. Warmer oceans increase moisture in the atmosphere, providing fuel for tropical cyclones and destructive rainfall. Hotter seas also directly contribute to sea level rise -- water expands when it warms up -- and create unbearable conditions for tropical reefs, whose corals can bleach and die during prolonged marine heatwaves. The first six months of the year were marked by widespread marine heatwaves that affected around 82 per cent of the world's oceans, the second-largest extent after 2024, according to the Copernicus Marine Service. Marine heatwaves -- prolonged periods of unusually high sea temperatures -- can affect weather, trigger coral bleaching and prove fatal for marine wildlife. Global sea surface temperatures varied in the first half of the year, according to the service, which is run by Mercator Ocean International, an EU-backed non-profit organisation. The Mediterranean broke its June record at 24.3C, surpassing the previous highs set in 2023 and 2025. Marine heatwaves hit 98 per cent of the basin during the first six months of the year. A marine heatwave affecting the northwestern Mediterranean broke a record intensity measurement on Monday after a week that saw temperature records tumble in Europe, a Spanish climate institute said. The tropical Pacific also had its hottest June ever at 27.26C. The region matched its 2016 record for the January-to-June period, with the strongest and most persistent warming in the western equatorial Pacific and off the coasts of Peru and California.