A study by the Institute for Environmental Research and Sustainable Development of the National Observatory of Athens, supported by data from the European Copernicus climate change service, has confirmed that the average temperature in Greece has increased by about 1.5°C in the last 30 years, with a greater increase mainly in northern Greece, in areas far from the sea that have seen an average increase of 2°C.

On average, for the entire Greek territory, the increasing trend is approximately 0.05°C per year and 1.5°C for the entire 30 years. However,  in the regions of southern Greece and especially on Crete, the trend in the increase is much smaller.

In the same period, 1991-2020, the average temperature has increased at a slower rate across the planet, including Europe as a whole, which has seen an increase of 1.2°C, but the region that includes the Balkans and south-eastern Europe is warming faster.

The study also identified an increase in sea surface temperature by 1.5 °C, with a maximum increase trend in the northern Aegean and Ionian seas and around Crete.