Spain is bracing for another burst of heat as the veranillo de San Miguel pushes temperatures above 35°C in several regions. Clear skies and calm weather will dominate, but some areas will see tropical nights and local changes.
Parts of Spain will see the thermometer jump above 35 degrees this week. The veranillo de San Miguel is back, bringing a late-September heatwave to Galicia, Catalonia, and the southwest. This weather pattern is a regular event in Spain, but this year it comes with a sharp rise in daytime highs and a stretch of calm, settled weather.
The Agencia Estatal de Meteorología (Aemet) says high pressure will keep skies mostly clear or just lightly clouded across the country. Most of Spain will get plenty of sun. Early in the day, low clouds could show up in Galicia, the Cantabrian coast, the upper Ebro, the Balearic Islands, the southern Mediterranean, and the western Alborán. Melilla and the Strait might get a brief drizzle, but these clouds should clear as the day goes on.
In early September 2026, El Granado in Huelva recorded a temperature of 45.7b0C, marking one of the most extreme September highs ever registered in Spain.
In the Canary Islands, the north will see some clouds, but the rest of the islands will have bright, open skies. Morning fog could form in northern Galicia, the Cantabrian region, the upper Ebro, and the Balearics. There may also be small patches of fog along the Mediterranean pre-coastal areas. A haze could drift over the Canaries, adding to the mix.
The biggest jumps in temperature will hit the northern half of the peninsula, especially the northeast and northwest, and both island groups. Mid-altitude and highland areas in the Canaries could see a strong rise. In other places, temperatures will stay about the same, but the southwest valleys, low-lying parts of Galicia, and Catalonia are all set to break the 35-degree mark.
Nighttime lows will mostly hold steady. There will be slight increases in the northern half and the Canaries, and some drops in the southeast. For many along the southern Mediterranean coast and the lower Guadalquivir, tropical nights—when it stays hot even after sunset—are likely.
By mid-September 2026, average temperatures in large regions of Spain were more than 4b0C above normal, according to data reported by Eltiempo.es via Europa Press. This ongoing anomaly led AEMET to issue heat warnings in several autonomous communities, including Andalusia, Aragon, Castilla y Lef3n, Castilla-La Mancha, Catalonia, Extremadura, and Madrid, with peaks above 35b0C to 38b0C in the south, northeast, and Canary Islands.
Wind will play a part too. Moderate easterly winds are expected in Alborán, with strong gusts in the Strait that should ease later. The Cantabrian coast will get moderate easterlies. The Canaries, southeast, and Galician coasts will see moderate to strong winds from the north and northeast. Elsewhere, light winds from the north and east will be common. The Ampurdán and northern Balearics will get moderate tramontana, and the Ebro valley will see cierzo.
This late heatwave shows how unpredictable Spain's weather can be. Summer heat can return just as autumn seems to start. People living in or visiting the hottest regions should stay hydrated and protect themselves from the sun. The veranillo de San Miguel is a clear sign that in Spain, the calendar does not always match the weather.
