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On the Costa Blanca, summer does not announce itself with a slow transition. Temperatures are rising early, and noticeably so. AEMET expects above-average values for May, June and July 2026 in Spain; the national weather agency sees a high probability that average temperatures will be in the upper range during this period.
For the Comunitat Valenciana, Spanish media, citing AEMET, are already reporting values at the end of May that sound more like midsummer than early summer. The heat is set to intensify from Thursday; for Friday, the provincial capitals are reporting temperatures of up to 34 degrees in Valencia and Castellón and 31 degrees in Alicante. Particularly relevant for coastal resorts: from Friday, tropical nights may occur on the coast - nights in which the temperature does not fall below 20 degrees.
This is exactly what changes everyday life along the Costa Blanca - from Dénia and Xàbia via Calpe, Altea, Benidorm, Alicante and Santa Pola to Torrevieja. A hot day can often be organised. You can postpone errands, look for shade, travel short distances and switch on the air conditioning. It becomes more difficult when the flat no longer cools down at night.
The Costa Blanca thrives on the sea. In summer, the coast is often more pleasant than the interior. But warm nights can mitigate this advantage. Facades, terraces, streets and courtyards store the heat. In flats without good cross-ventilation, older buildings without external sun protection or heavily built-up residential complexes, the heat remains for a long time.
Then the night becomes a burden. People who sleep badly often drink too little, are less resilient and start the next hot day already exhausted. For older residents, people living alone, the chronically ill and young children, this is not just a matter of comfort.
The Generalitat Valenciana runs a programme for the prevention and care of health problems caused by high temperatures. It provides information on risks, protective measures and risk levels in the event of heat; for 2026, the health authority refers to the programme for high temperatures in the Comunitat Valenciana.
Heat on the Costa Blanca almost always means more water consumption. Gardens are watered more frequently, pools are maintained more intensively, holiday homes are used more, restaurants and private households run in summer. This affects the entire coast - from the Marina Alta to the Marina Baixa and Alicante to the southern Costa Blanca around Torrevieja.
The situation varies from region to region, but the basic issue remains the same. In the Marina Baixa, rainfall has brought relief, but regional media continue to warn against giving the all-clear too quickly. The director of the Consorcio de Aguas de la Marina Baixa, Jaime Berenguer, explained that the improvement should not be confused with the end of the drought; the comarca is still officially in an alert situation.
In addition, the Marina Baixa has been discussing the performance of its water infrastructure for some time. According to Cadena SER, the Guadalest and Amadorio reservoirs have been criticised for lack of maintenance and sediment deposits; despite the rain, the region remains dependent on external water contributions.
For residents, this means that water is not a distant administrative issue on the Costa Blanca. It's part of the summer - in the garden, by the pool, in the holiday flat, in urbanisations and in your own home.
With tropical nights, the air conditioning season also starts earlier. Many appliances are only switched on when the first really warm night arrives. This is when it becomes clear whether filters have been cleaned, outdoor units are free, drains are working properly and settings are appropriate.
A common mistake: rooms heat up a lot during the day and the appliance is set very cold in the evening. This consumes a lot of electricity, puts a strain on the technology and often achieves less than expected. A combination of shading, ventilation and moderate cooling works better.
Persianas and awnings should be used early in the day, not when the rooms are already hot. Ventilation is best in the morning or late in the evening. Air conditioning systems do not have to run at refrigerator temperature to allow you to sleep. Particularly in holiday homes, owners should give clear instructions so that appliances do not operate permanently with the windows open.
On the Costa Blanca, not only does the temperature rise in summer, but so does the utilisation of many properties. Flats, houses and urbanisations that were quiet in spring are suddenly fully occupied. This increases water consumption, waste, pool use, noise and the strain on technology.
Clear information helps to avoid conflicts. Guests should know how the air conditioning, pool cover, waste disposal, irrigation and outdoor areas are used. This may seem trivial, but it saves trouble with neighbours, service providers and owners' associations.
Especially in regions with a strained water supply, it makes sense to make simple rules visible: do not water during the hottest hours, do not leave water running, use pool covers, report leaks immediately, do not run the air conditioning with the doors open.
There is still time for a sober summer check. If you only take action when several tropical nights in a row heat up your home, you have less room for manoeuvre.
What is important now:
The Costa Blanca is used to warm summers. But 2026 shows early on what residents need to be prepared for: higher temperatures, warm nights, more energy consumption and water issues that don't just become relevant in August.
That's no reason to panic. But it is a good time not to just let the summer come to you. Checking your home, garden, pool, air conditioning and neighbourhood now will give you a more relaxed start to the hot weeks.
In the end, it's not about badmouthing the summer. It's about organising it better. Because on the Costa Blanca, it's not just the day that decides the load, but increasingly the night, which no longer cools down properly.
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