Spain has just lived through its most intense summer since national records began in 1961, according to the State Meteorological Agency (Aemet). The average temperature for June, July and August reached 24.5°C, beating the previous high set in 2025 by 0.3°C and sitting 2.4°C above the long-term norm. Even more striking is the sheer duration of extreme heat: Spaniards endured 61 days officially classified as heatwave conditions, a full 20 more than in the infamous summer of 2022.
Aemet’s data underline a broader trend: all ten of the hottest summers in Spain’s historical record have occurred in the 21st century, and seven of the eight warmest have taken place since 2015. The agency also points out that the meteorological summer is effectively stretching its boundaries. In late May, temperatures typical of July were registered across large parts of the country. Then, in September—already meteorological autumn—a six-day heatwave ran from the 2nd to the 7th, affecting 16 provinces. Only four previous Septembers (1987, 1988, 2006 and 2016) have seen such extreme heat so late in the year.
Reservoirs hold up, but fires expose gaps
Despite the heat, Spain’s reservoirs have emerged from the summer in remarkably good shape, thanks to heavy winter rains. The average fill level stood at 62.58% after the tourist season, and even typically stressed basins—such as the Júcar, Segura, Andalusian Mediterranean and Catalan catchments—remained above half of their capacity. That is a relief for farmers and municipalities that have faced severe restrictions in recent drought years.
Yet the summer also exposed persistent weaknesses in forest fire prevention and response. Large-scale blazes broke out in regions including Madrid, Aragón and Castilla y León, echoing similar problems across southern Europe. Firefighting crews have repeatedly warned about understaffing and poor working conditions, and this year’s fires have reignited calls for a more robust, better-funded prevention strategy.
The heat has not been confined to Spain. Across the Mediterranean basin, from Portugal to Greece, summer 2026 has brought record temperatures and devastating wildfires. In Portugal, record fuel prices have already triggered road protests, adding economic strain to the climate pressure. Meanwhile, the broader European picture is one of accelerating warming, with scientists pointing to a combination of greenhouse gas emissions and shifting atmospheric patterns.
For Spain, the implications go beyond discomfort. Longer, hotter summers affect public health, energy demand, agriculture and tourism—the country’s economic mainstay. The government has launched initiatives like the CASA 47 portal to expand affordable public housing, but climate adaptation remains a pressing challenge that cuts across many policy areas.
Aemet’s warning that summers are getting longer is not just a statistical curiosity. It means that the traditional seasonal calendar—and the infrastructure, services and habits built around it—will need to adapt. The agency’s data show that heatwaves are no longer a mid-summer anomaly but a recurring feature of Spanish life from late spring into early autumn.
As Europe grapples with the consequences of a warming planet, Spain’s experience offers a stark preview. The country’s ability to manage water resources, protect its forests and safeguard its citizens will be tested again next year—and likely every year after that.
