US EditionNew Record June High for Mediterranean Sea
- On June 29, 2025, the Mediterranean Sea reached its highest recorded temperature for the month of June, measuring 26.01°C and impacting areas near the French Riviera and Spain.
- This unprecedented heatwave follows consistent above-average temperatures in the Mediterranean since 2023, with seasonal sea surface temperatures rising approximately 3°C above the 1991-2020 average.
- Researchers detected an intense marine heatwave affecting the area around the Balearic Sea near Spain and the Tyrrhenian Sea off Italy’s western coast, cautioning that rising temperatures may threaten the survival and reproduction of certain marine species.
- A scientist from Copernicus reported that on June 22, sea surface temperatures exceeded the typical seasonal levels by over 5°C, marking an unprecedented peak for a June day when considering the average temperature across the Mediterranean basin.
- The record heat highlights accelerating regional warming and implies ongoing threats to marine ecosystems alongside increased risks of extreme weather events and damage to fisheries.
16 Articles
16 Articles
On Sunday, June 29, the Mediterranean Sea experienced its warmest surface temperature ever recorded for a month of June. It was 26°C, three degrès more than 30 years ago. This has consequences for fauna and flora, even 20 meters deep. A marine heat wave: imagine an underwater fire that does not burn, but deteriorates, or even kills habitats. And it also promotes the appearance of exotic species. The majority does not cause any problem, but some …
The heat wave that has been rushing to Spain since last Saturday is not only leaving suffocating thermometers in the Peninsula: it is also significantly increasing the temperatures of the seas that bathe our country, especially the Mediterranean or the Cantabrian. The intense heat is causing the waters that bathe the east coast to be between 5oC and 6oC above what is usually usual for this time of year.
A heat wave is plaguing Europe at the turn of June and July. Sunny weather and high temperatures are also heating up surface waters. The temperature of the Mediterranean Sea has already risen from such high values to extremes. This can have serious consequences in the medium and long term. Heavy rains are likely at the end of summer and in autumn, such as the floods that brought to the Czech Republic last year.
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