Sea Surface Temperatures Shatter Records in June, Raising Heatwave Fears

Global sea surface temperatures reached a record high in June, surpassing previous records set in the same month of 2023 and 2024, according to the Copernicus Climate Change Service. This alarming trend, occurring as an El Nino phenomenon strengthens, is fueling worries about intensified heatwaves this summer and broader climate disruptions.

Scientists have previously described the rising sea surface temperatures as "terrifying" and "frightening" due to their exceeding earlier projections. This warming is a key indicator for El Nino events, which can lead to severe weather phenomena such as heatwaves, floods, and storms. Carlo Buontempo, Director of the Copernicus Medium-Range Weather Forecasts Centre, warned that the current trajectory suggests new records are likely in the coming months.

While land temperatures often capture public attention, with recent record-breaking heatwaves in the UK and Europe, sea surface temperatures offer a critical insight into the planet's overall warming. The oceans absorb over 90 percent of the excess energy trapped in Earth's climate system, primarily driven by greenhouse gas emissions from burning fossil fuels.

This energy imbalance reached a record 23 zettajoules last year, more than double the average of the previous two decades, accelerating ocean warming. In 2020, the heat absorbed by the oceans was equivalent to detonating five Hiroshima-sized atomic bombs every second. Scientists caution that it is still too early to determine if this extreme ocean warming is a temporary phase or a precursor to further deterioration, as peak global temperatures are typically recorded in July and August.

“

With sea surface temperatures at this level and El Nino on the horizon, it is likely we will see new records in the coming months.