Spain Heatwave 2026: AEMET Map Shows 40°C Becoming the New Normal 2026

Spain heatwave 2026 forecasts from AEMET make one thing clear: the country must get used to living at 40°C. The State Meteorological Agency has been warning for weeks that this summer could rank among the hottest on record, and the mercury is now delivering on that prediction.

According to AEMET spokesperson Rubén del Campo, the third heatwave of the season is arriving this week, with the highest temperatures so far in 2026 expected across eastern, central, and southern Spain.

What AEMET Is Forecasting for This Week

The agency's latest update, published on Monday, July 20, points to a sustained period of extreme heat rather than a short spike. Overnight temperatures will be especially punishing in central Spain, the Mediterranean coast, the Balearic Islands, and the Guadalquivir valley.

Minimum temperatures in those areas are not expected to drop below 23–25°C. In cities such as Barcelona, the mercury may not fall below 26 or 27°C, which removes the relief that night-time usually provides.

Daytime conditions will intensify across western Andalusia and the northern third of the peninsula. AEMET expects temperatures to exceed 36°C almost universally in the north and 38°C in the south.

Where the Heat Will Hit Hardest

Eastern, central, and southern zones are forecast to reach or surpass 38–40°C. The most extreme values, between 40 and 42°C, are expected in south-eastern Andalusia.

This is not a uniform event. Coastal areas may see slightly lower peaks, but the combination of heat and humidity will keep apparent temperatures high. Inland basins, meanwhile, will trap heat and extend the duration of dangerous conditions.

Why This Heatwave Matters Beyond the Thermometer

Three heatwaves in a single summer is a pattern that strains public health systems, energy grids, and water reserves. High overnight temperatures are particularly risky because the body cannot recover from daytime heat stress.

Elderly people, outdoor workers, and those with chronic illnesses face the greatest danger. Local authorities are likely to reinforce cooling centres and hydration advice as the week progresses.

Energy demand also climbs sharply during these episodes. Air conditioning use spikes, putting pressure on the grid and raising the risk of outages in the hottest hours.

Key Takeaways for Residents and Travelers

• Night-time heat will be the defining feature of this episode, with minimums of 23–27°C in many cities.
• Peak daytime values of 40–42°C are expected in south-eastern Andalusia.
• Northern Spain will not escape the heat, with widespread readings above 36°C.
• Health risks are highest for the elderly, infants, and outdoor workers.
• Energy demand will surge, increasing the chance of local grid stress.

How This Week Compares With a Typical Spanish Summer

The comparison shows that the main shift is not just higher peaks but warmer nights and longer duration. That combination is what makes a heatwave genuinely dangerous rather than merely uncomfortable. The background to this story is set out in Spain Heatwave Alert: AEMET Warns of Intense Heat Return. A related thread runs through Spain's AEMET Forecast: No Autumn in Sight as Heat Persists. Earlier coverage in Extreme Heat Breaks Records in Central and Eastern Europe shows how the argument developed.

What to Watch Next

AEMET's updates from Thursday onward will indicate whether the heat eases or consolidates into a longer episode. Forecasters are watching for the arrival of cooler air from the Atlantic, which could bring relief to the west while the east remains hot. A closer look at the same subject appears in Spain September Heat: AEMET Forecast U-Turn and 43C Heat. Anyone following the wider picture can start with AEMET Eclipse Forecast: Cloud Cover Map for August 12. The same theme surfaces in AEMET Forecast for August 12 Solar Eclipse Across Spain, which takes a different angle.

For now, the agency's message is clear: Spain must treat 40°C as a recurring condition, not an anomaly. Adaptation measures, from urban cooling plans to revised working hours, are becoming essential infrastructure. Context on how this played out before sits in Spain Heatwave and Wildfire Risks: What Travelers Must Know. A companion piece, El Niño Forecasts Predict 2027 as Hottest Year Ever, approaches the same subject from another angle.