In early September, a season when summer's grip is expected to loosen, North African heat has surged across the Iberian Peninsula and into the broader Mediterranean world, pushing Spain to temperatures that belong to the height of midsummer. The event speaks to a deepening pattern in which the boundaries of extreme heat stretch further in time as well as geography. Britain will feel a brief, tempered echo of this warmth over the weekend before the Atlantic reasserts its cooler, wetter character — a reminder that proximity to extremes does not always mean sharing in them.
European heatwave brings brief warmth to UK this weekend
Heat from Africa intensified over dry ground under clear skies
Mark
So Spain just hit 45.7 degrees. Is that the kind of number that should alarm us, or is it within the range of what we've come to expect?
Mimi
It's genuinely unusual. That's the highest reading Spain has recorded all year, and it happened in early September—outside the typical peak months. The heat came from North Africa and intensified over dry ground under clear skies.
Luke
But we should be careful here. One station, one reading. It's the highest this year, yes, but is it the highest on record for Spain in September? The source doesn't say that.
Mimi
Fair point. What we know is it's the highest of 2026 for Spain, and the timing is odd. Orange warnings are up across four countries through Saturday.
Mark
Why is the Mediterranean staying warm? That seems like it could keep feeding this.
Mimi
Sea temperatures are running about 4 degrees above normal in the central basin. That's a heat reservoir that can sustain patterns like this.
Luke
Again, that's one estimate. We don't know how many measurements that's based on or how representative it is.
Mark
And the UK gets a taste of this on Sunday?
Mimi
A brief one. Southerly winds will push some warmth our way, but cloud will increase and the pattern won't last. England and Wales might see low to mid 20s, the southeast possibly 27 or 28.
Mark
That's pleasant but not a heatwave.
Mimi
Exactly. By next week, Atlantic air moves in and it cools down again. No sustained heat expected for Britain.
Luke
The forecast confidence for next week is presumably lower than for this weekend, right? Ten days out is a long way.
Mimi
True. But the pattern does seem to be shifting toward cooler, wetter conditions.
Il Polso
- Spain recorded 45.7°C this week — its highest temperature outside of July or August — signalling that the calendar no longer reliably predicts when dangerous heat will arrive.
- Orange extreme heat warnings stretch from Spain and southern France through the Balkans and into Serbia, with parts of Spain expected to remain above 40°C well into next week.
- The Mediterranean Sea, running some 4°C above normal temperatures, is acting as a vast heat reservoir, sustaining and amplifying the atmospheric conditions driving the event.
- Southerly winds will carry a diluted pulse of warmth into England and Wales this Sunday, with the southeast potentially reaching 27–28°C before cloud and shifting winds limit the effect.
- Atlantic weather systems are forecast to sweep in early next week, returning Britain to cooler, wetter conditions and closing the window on any prospect of a sustained heatwave.
In early September, a season when summer's grip is expected to loosen, North African heat has surged across the Iberian Peninsula and into the broader Mediterranean world, pushing Spain to temperatures that belong to the height of midsummer. The event speaks to a deepening pattern in which the boundaries of extreme heat stretch further in time as well as geography. Britain will feel a brief, tempered echo of this warmth over the weekend before the Atlantic reasserts its cooler, wetter character — a reminder that proximity to extremes does not always mean sharing in them.
Central and southern Europe is enduring a dangerous heat event this week, with Spain and France recording temperatures regularly above 40°C. A weather station in El Granado, in Spain's southwest, reached 45.7°C on Thursday — the country's highest reading of the year and a figure that would be remarkable even in the peak of summer. That it arrived in early September underlines how unusual the current pattern is.
The heat originated in North Africa, moving northward onto the Iberian Peninsula where it intensified over parched ground beneath clear skies. It has since spread northeast into the Balkans, Greece, and Turkey. Orange extreme heat warnings — the second-highest alert level — remain in place through Saturday across Spain, southern France, Bosnia and Herzegovina, and Serbia. Even northern Spanish valleys that typically see mild September temperatures are expected to run well above their seasonal norms. Southern France faces highs in the upper 30s, with some areas potentially touching 40°C. Beneath it all, the Mediterranean Sea is running roughly 4°C above normal, a reservoir of warmth that helps sustain the pattern.
For Britain, the continental heat will arrive only as a faint imprint. Southerly winds this weekend will draw warmer air northward, with Sunday the warmest day — low to mid 20s across England and Wales, with the southeast possibly reaching 27 or 28°C. Scotland and Northern Ireland will stay cooler, in the 15 to 20°C range. The warmth will be short-lived: fresher Atlantic air and rain are forecast to move in early next week, returning temperatures to seasonal norms. Forecasters see no sign of a true heatwave establishing itself over Britain, leaving the most intense heat as a distinctly southern European story.
Central and southern Europe is in the grip of a heat event that has pushed temperatures into dangerous territory this week. Spain and France have borne the worst of it, with readings regularly climbing above 40 degrees Celsius. On Thursday, a weather station in El Granado, in Spain's southwest, recorded 45.7 degrees—the highest temperature the country has logged all year. What makes this notable is the timing: such extreme peaks typically occur in July or August, not in early September, a sign of how unusual the current pattern is.
The heat originated in North Africa, where hot, dry air moved northward onto the Iberian Peninsula earlier in the week. Once there, it intensified under clear skies and over ground already depleted of moisture. From Spain and southern France, the warmth has continued spreading northeast into the Balkans, Greece, and Turkey. Orange extreme heat warnings—the second-highest alert level—remain in effect through Saturday across Spain, southern France, Bosnia and Herzegovina, and Serbia. In Spain's hottest zones, temperatures will stay above 40 degrees through the weekend and into early next week. Even the Erbo valley in the north, where September typically brings readings near 20 degrees, is expected to see the mercury climb well above that baseline.
Southern France, particularly the Ardeche region, faces temperatures in the high 30s over the coming days, with some areas possibly reaching 40 degrees. Greece and Turkey have seen their peak heat ease somewhat this week, though both countries could still experience high 30s temperatures in the early days of next week. Beneath the surface, the Mediterranean itself remains a concern: sea temperatures are running roughly 4 degrees above normal in the central basin, a reservoir of warmth that can sustain and amplify heat patterns.
The question for Britain is whether this continental heat will reach across the Channel. The answer is yes, but only briefly and with considerably less intensity. Southerly winds this weekend will draw warmer air toward the UK, with Sunday emerging as the warmest day of the period. However, the effect will be short-lived, constrained by increasing cloud cover and the transient nature of the wind pattern itself. Across England and Wales, temperatures will generally settle in the low to mid 20s Celsius, though the southeast could push toward 27 or 28 degrees. Scotland and Northern Ireland will remain cooler, in the 15 to 20 degree range, still several degrees above what is typical for early September but far removed from the extremes affecting continental Europe.
By next week, the reprieve ends. Fresher Atlantic air and rain-bearing weather systems are forecast to move in, bringing temperatures back down and ending any prospect of sustained warmth. Forecasters see no indication that a true heatwave will establish itself over Britain in the coming ten days. The European heat, intense as it is, will remain a southern phenomenon—a reminder of how weather systems can create stark contrasts across relatively short distances, and how quickly conditions can shift.
Citazioni salienti
It is very unusual for the annual maximum temperature to occur outside of July and August— BBC Weather reporting on Spain's September heat record
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