Autumn has officially begun, but temperatures in Madrid are forecast to reach 35 degrees again. They may approach 40 degrees in parts of Spain, and six regions have yellow heat alerts during the central hours of the day.
The sharpest change will come along the Atlantic north, where temperatures are set to drop substantially. RTVE reports that an anticyclone will keep conditions stable. The south and inland areas will remain much warmer than the north-west and the Cantabrian coast.
AEMET has issued warnings for Andalucía, Aragón, Castilla-La Mancha, Catalunya, Extremadura and the Canary Islands. Maximum temperatures may reach or exceed 35 degrees in several of those areas.
EFE reported temperatures of up to 38 degrees in parts of Córdoba, Huelva, Jaén and Sevilla. The Huelva coast may reach 36 degrees, while other reports put Badajoz as high as 39 degrees. Some mid-altitude areas of the Canary Islands are also expected to see similarly high temperatures.
AEMET’s broader outlook put the probability of a warmer-than-normal autumn from September to November 2026 at 60-70%, compared with 10% for a colder season.
The heat is unevenly distributed across the country. Temperatures will rise in the Ebro valley, the Balearic Islands and the Mediterranean arc, with the strongest increase in the south-east. Aragón’s Ebro valley could reach around 36 degrees, and parts of Tarragona in Catalunya may also hit 36.
Galicia and the Cantabrian region will be noticeably cooler inland. A Coruña is expected to reach just 21 degrees, while Bilbao will reach 26.
The late-September heat is part of a broader episode, not an isolated warm day. Spanish media reported temperatures above 35 degrees in several southern and inland areas between 21 and 24 September. AEMET warnings remained in force in multiple autonomous communities, EFE reported.
Night temperatures will rise across much of Spain too. Galicia will be the basic exception, with minimum temperatures falling further; Lugo could drop to 11 degrees.
An anticyclone over the Peninsula will keep conditions stable, bringing mostly clear skies and almost no rain. Morning mist and later low cloud are expected in Galicia, the Cantabrian region and parts of the Mediterranean coast.
Winds will vary by region. They will blow moderately across the northern Mediterranean, the Balearic Islands, the Cantabrian coast and Galicia. Moderate easterly winds are also expected in Alborán and the Strait. Elsewhere, winds will stay light.
Heat will persist across the south, the eastern interior and Mediterranean areas, while cooler weather moves into the Atlantic north. The yellow alerts show where temperatures are expected to have the greatest impact. AEMET's warnings and forecasts reported by EFE and RTVE point to late-season warmth across much of Spain, though temperatures will vary by region.
