Spain is bracing for another spell of extreme summer heat. Credit : aleks333, Shutterstock
Just when it felt like Spain might finally get a break from the relentless heat, forecasters are warning that another intense spell of scorching weather is already on the horizon. From this thursday, July 2 temperatures are expected to climb once again, with parts of the country likely to top 40C. But what has caught meteorologists’ attention isn’t just the heat itself. It’s where it’s coming from.
Many people assume Spain’s hottest days arrive when scorching air sweeps in from the Sahara. This time, experts say that’s not necessarily the case. Instead, the peninsula is expected to generate much of the heat itself, creating the kind of conditions that can leave cities sweltering for days and nights offering very little relief.
For anyone living in Spain or planning a holiday over the coming week, the result may feel exactly the same. Long afternoons that are too hot for sightseeing, evenings that barely cool down and another stretch of weather where air conditioning becomes less of a luxury and more of a necessity.
Why Spain doesn’t need the Sahara to produce extreme heat
The idea that Spain can become its own source of extreme heat might sound surprising, but meteorologists say it’s something they have been seeing more often in recent summers.
The forecast points to a powerful area of high pressure settling over the Iberian Peninsula from the end of the week. That high pressure acts like a lid on the atmosphere. Sunshine pours in hour after hour, winds remain light and there is very little to disturb the warm air building close to the ground.
As the air slowly sinks, it becomes even warmer and drier. Add in some of the longest days of the year and the result is what forecasters describe as a heat dome, a weather pattern that traps hot air over the same area instead of allowing cooler Atlantic air to move in.
It’s a reminder that Spain doesn’t always need a blast of Saharan air to experience dangerous temperatures. Under the right conditions, the peninsula can effectively become its own hotspot.
That doesn’t mean the Sahara plays no role in Spanish heatwaves. Sometimes hot air from North Africa does combine with these weather patterns, making conditions even more extreme. But according to current forecasts, the atmosphere over Spain is capable of producing plenty of heat on its own.
What people across Spain are likely to notice first
The first thing many people will notice probably won’t be the afternoon temperatures. It will be the nights.
When a heat dome settles over Spain, the heat built up during the day has nowhere to go. Buildings, roads and pavements continue releasing warmth long after sunset, making it difficult for temperatures to fall.
That means many towns and cities could once again experience tropical nights, when temperatures stay above 20C until morning. In some inland areas, forecasters are even warning of torrid nights, where the mercury may struggle to drop below 25C.
For residents, that often becomes the hardest part of a heatwave. Sleeping with the windows open offers little relief if the air outside still feels warm. Fans end up running all night and homes without air conditioning can quickly become uncomfortable.
During the day, inland regions and western Spain are expected to bear the brunt of the heat, with temperatures above 40C becoming increasingly likely if the latest forecasts hold. Coastal areas should remain slightly cooler thanks to sea breezes, although many popular holiday destinations will still experience unusually hot conditions.
There is a chance that isolated thunderstorms could develop as small disturbances move across the upper atmosphere. While they may briefly cool a few local areas, they are not expected to bring widespread relief from the heat.
Why these heat domes are becoming a familiar part of Spanish summers
If it feels as though Spain is seeing more of these prolonged heat episodes, that’s because meteorologists say the weather patterns behind them are becoming increasingly common.
During the recent spell of extreme temperatures, the air mass became exceptionally hot over the Iberian Peninsula before spreading north across France and into central Europe, helping to break temperature records far beyond Spain’s borders.
A similar setup now appears to be developing once again. Forecast models suggest another strong ridge of high pressure will become established over Spain, creating the stable conditions needed for heat to build rapidly over several days.
For many people, the distinction between a Saharan heatwave and one generated largely over Spain probably won’t matter. What matters is how it feels on the ground.
It means planning outdoor activities earlier in the morning, thinking twice before heading out in the middle of the afternoon and accepting that evenings may offer little escape from the heat.
Holidaymakers may find beaches busier than usual as people search for any breeze they can find, while inland cities could become particularly uncomfortable during the hottest hours of the day. Anyone hiking, cycling or visiting historic towns should be prepared for temperatures that can quickly become exhausting.
The latest forecasts may still evolve over the next few days, but one thing already looks increasingly likely. Spain is heading into another period of exceptionally hot weather just days after the last one ended.
And while many people instinctively look south whenever the mercury rises, this time the real story is much closer to home. Under the right atmospheric conditions, Spain doesn’t always need the Sahara to produce a heatwave. Sometimes, the country’s own weather is enough to turn much of the peninsula into one of Europe’s hottest places.
With the height of the summer holiday season still ahead, that is unlikely to be welcome news for residents hoping for cooler evenings or visitors expecting more comfortable conditions. For now, the forecast suggests the heat is not ready to loosen its grip just yet.
