Temperatures will reach 37 degrees in parts of the Canary Islands and exceed 34 degrees in several Galician provinces on Wednesday, September 23. Spain's State Meteorological Agency, AEMET, has issued yellow heat alerts for A Coruña, Ourense and Pontevedra. The mainland's highest forecast temperature is 39 degrees in Badajoz.
The heat will vary across the country. The highest readings are expected in southwest Galicia, the low-lying areas of the southwestern quadrant and Las Palmas. High-altitude calima is also forecast in the Canary Islands, where a shower around Teide cannot be ruled out despite the settled outlook. Astronomical autumn begins on September 23, but AEMET expects above-normal, summer-like temperatures to persist across much of Spain, including Galicia, the Canary Islands and the southwest.
Gran Canaria, Lanzarote and Fuerteventura are also under yellow alerts. Forecast highs range from 35 to 37 degrees, putting the islands among Spain's hottest areas on Wednesday. On Gran Canaria, the warning covers the eastern, southern and western areas, but not the entire island. AEMET also forecasts very warm nights in the Canary Islands. Lanzarote and Fuerteventura may see isolated, short-lived showers and thunderstorms despite the prevailing heat.
Most of the country will stay calm and bright.
Skies will be clear across much of Spain. Coastal cloud and mist may develop along the northernmost shores. Cloudy spells are also possible over the southeastern Mediterranean, Alborán and the Strait of Gibraltar. The calmer forecast marks a sharp change from the unstable Mediterranean conditions described in earlier weather coverage.
Maximum temperatures will fall along parts of the western Cantabrian coast and in the Valencian Community. They will rise across the southern half of the country, the upper Ebro and the western Pyrenees. Seville and Córdoba are expected to reach 37 degrees, while Badajoz will be hotter at 39 degrees. AEMET's wider outlook places Galicia in a warm spell that also covers Extremadura and Andalusia. The heat extends beyond one region.
Nights will feel very different depending on the location. Tenerife is forecast to stay at 24 degrees, while several places in Cádiz will not fall below 22. Minimum temperatures are expected to reach 20 degrees in Ceuta, Melilla, Tarragona and Barcelona. Navarra and southern País Vasco will have the lowest readings, at 11 degrees. Salamanca will fall to 12, and Zamora to 13. The figures show how warm nights will remain in the Canaries and parts of mainland Spain.
Wind will bring further regional variation. A moderate easterly flow is expected over Alborán, with strong spells in the Strait. The Canary Islands will have moderate north-easterly winds. Galicia, the Ampurdán and the Balearic Islands will also see moderate north-easterlies. A northerly wind will reach the Cantabrian coast. Inland winds will be lighter, with moderate spells in other coastal areas and the Ebro.
People in the alert zones and the hottest lowland areas should take extra care. Northern and Mediterranean coastal locations may see lower daytime temperatures. Clear skies, high maximums and calima will bring strong regional contrasts on Wednesday, with heat concentrated in some parts of Spain.
Spain will remain broadly stable, but the yellow alerts indicate where the heat will be most intense. Southwest Galicia, Las Palmas, Gran Canaria, Lanzarote and Fuerteventura carry the clearest warnings. Badajoz has the country's highest listed maximum, at 39 degrees. The weather will be settled, though conditions will vary sharply between regions.
