Costa del Sol Water Reservoirs 2026: From Drought to Recovery
What property buyers, residents and visitors need to know about water supply on the Costa del Sol
Published by Plexo Properties • plexoproperties.com • March 2026
Data sources: Ministerio para la Transición Ecológica, Junta de Andalucía, Embalses.net, Vandenboom.es, Andalucia.com, Euro Weekly News, The Olive Press (2025–2026). Reservoir figures are approximate and subject to daily fluctuation.
1. Overview: Costa del sol water reservoirs
If you’re considering buying property on the Costa del Sol, you’ve probably seen headlines about Spain’s drought problems. Water supply is a legitimate concern for anyone thinking about investing in southern Spain – and it’s also a topic that has dramatically improved in early 2026.
After years of severe drought that imposed strict restrictions on residents and tourism alike, heavy winter rains from late 2025 have replenished Málaga province’s reservoirs to near-record levels. The Costa del Sol has moved from emergency drought status to “normal” – and the outlook for 2026 is the strongest in years.
In this guide we walk you through the current state of the reservoirs, the recent recovery, infrastructure investments, water quality, and what all of this means for property buyers, residents and visitors.
Quick facts: Costa del Sol water supply in 2026
- Málaga province reservoirs at approximately 83% capacity (February 2026)
- No major water restrictions in place on the western Costa del Sol
- 90 million m³ of water added in one month – enough for 1.5+ years of Málaga city supply
- La Viñuela recovered from 7% (Jan 2024) to over 81% (Feb 2026)
- Desalination plants provide climate-independent backup supply
- Tap water is certified safe to drink across all 14 Costa del Sol municipalities
2. The Recent Recovery: How the Rains Changed Everything
Abundant rainfall from late 2025, including powerful Atlantic storms such as Storm Francis, Storm Leonardo and Storm Marta, transformed the water landscape across Andalucía. By early January 2026, Spain’s national reservoirs stood at around 56% of total capacity – a significant recovery from the drought lows below 40% seen in previous years.
Málaga province saw particularly dramatic gains. In just one month, the province’s dams added approximately 90 million cubic metres of water – enough to supply Málaga city for over a year and a half. Before December 2025, the provincial reservoirs held 277 hm³; by early January 2026 that figure had jumped to 337 hm³. By mid-February, Málaga’s reservoir network had climbed to approximately 83% of total capacity, surpassing 540 million cubic metres and reaching a 10-year high.
La Concepción reservoir, the primary water source for Marbella and the western Costa del Sol, was so full by early January that authorities had to open floodgates as a safety measure, releasing water into the Río Verde to make room for further storms. At peak release, La Concepción discharged around 60 cubic metres per second – equivalent to four times the amount needed to supply the entire city of Málaga. It reached 87% capacity before being brought back down to a safer 80% through controlled releases.
Across Andalucía as a whole, reservoir capacity reached 77% – a 35% leap over the 10-year average of 42%. Provinces like Huelva and Sevilla exceeded 90%, and several individual reservoirs hit 100% capacity.
3. Key Reservoirs Serving the Costa del Sol
Six major reservoirs form the backbone of the Costa del Sol’s water supply, serving Málaga city, Marbella, the Axarquía coast and the surrounding tourist hubs. Here is how they stand as of February 2026:
| Reservoir | % Full | Capacity | Volume | Primary Role | Supplies |
| La Concepción | 79.7% | 62 hm³ | ~49 hm³ | Drinking water supply | Marbella, western Costa del Sol |
| La Viñuela | 71.2% | 164 hm³ | ~117 hm³ | Drinking water & irrigation | Axarquía, eastern Costa del Sol |
| Guadalteba | 96.9% | 153 hm³ | ~148 hm³ | Core provincial supply | Málaga province interior |
| Guadalhorce | 86.2% | 126 hm³ | ~109 hm³ | Inland supply | Málaga city & surroundings |
| Limonero | 94.1% | 25 hm³ | ~24 hm³ | Flood control & backup | Málaga city emergency |
| Casasola | 60.9% | 24 hm³ | ~15 hm³ | Flood prevention | Campanillas river basin |
Source: Ministerio para la Transición Ecológica / Junta de Andalucía, February 2026. Figures are approximate and subject to daily change.
The most remarkable recovery story is La Viñuela. In January 2024, this reservoir – the largest in the province at 164 hm³ capacity – had fallen to just 7%. It was essentially labelled a “dead reservoir” because the remaining water was too mixed with sediment for safe consumption. Thanks to storms Leonardo and Marta, it surged to over 81% by mid-February 2026, holding around 134 billion litres. That is an extraordinary recovery from a reservoir that many feared was lost.
The Guadalteba and Guadalhorce reservoirs, which between them supply the larger Málaga metropolitan area, reached 98% and 86% respectively. Their neighbour, the Conde de Guadalhorce, hit 100% capacity. After years of scarcity, Málaga’s reservoirs are full to the brim.
4. Historical Context: The Drought Years
To appreciate how significant this recovery is, it helps to understand what came before. Southern Spain experienced a severe multi-year drought that peaked between 2022 and early 2025. Andalucía saw a 45% rainfall deficiency compared to normal levels in 2023, and the region’s reservoirs dropped to alarming lows.
Strict water restrictions were imposed across the Costa del Sol. During the worst period, residents in parts of Málaga were limited to just 160 litres per person per day. Swimming pool fills were banned, garden watering prohibited, car washing restricted and beach showers limited. The 11 municipalities on the Costa del Sol and Málaga agreed to ban drinking water for all non-essential purposes.
By early 2025, some improvement began thanks to rains in late 2024 and spring 2025, but reservoir levels still hovered around 40–45% on average – well below comfortable margins. The inland reservoirs of Guadalteba and Guadalhorce were particularly slow to recover.
The transformation came with the heavy winter storms of late 2025 and early 2026. In a single week during early January, storms dumped an additional 129 billion litres into Andalucía’s reservoir network – enough to supply the entire city of Málaga for more than two years.
5. Current Water Status: Are There Restrictions in 2026?
As of early 2026, the Costa del Sol is classified in “normal” water status – the best category. No major water restrictions remain in place for the western Costa del Sol. The practical daily water allocation is set at 250 litres per inhabitant per day on the western Costa del Sol and 225 litres in Málaga city – both above actual consumption levels.
What this means for daily life: swimming pools can be filled, gardens watered and beach showers operate normally. Hotels and tourist facilities are running without limitations. The region has enough reserves to comfortably cover the high summer tourism season without anticipated cuts.
The Axarquía region on the eastern Costa del Sol was the hardest hit during the drought and is recovering slightly more slowly. While La Viñuela’s impressive recovery has eased the situation considerably, irrigation for agriculture in eastern areas may still face some restrictions as water allocation prioritises drinking water supply.
6. Infrastructure and Long-Term Water Security
The Costa del Sol does not rely on rainfall alone. A combination of infrastructure investments provides multiple layers of water security:
Desalination
The Marbella desalination plant is fully operational, producing up to 20 cubic hectometres per year. This acts as a crucial climate-independent backup for the western Costa del Sol. Estepona is planning an additional fast-build desalination plant producing 20,000 cubic metres per day using solar-powered, containerised technology. A future Axarquía desalination plant has been approved with initial capacity of 25 hm³ per year – split between drinking water and agricultural irrigation.
Water reuse and recycling
Spain is a pioneer in water reuse, with over 400 treatment plants across the country. On the Costa del Sol, approximately 81% of golf courses use reclaimed water for irrigation, dramatically reducing pressure on drinking water reserves. Reclaimed water is also used for municipal irrigation, industrial processes and environmental restoration.
Underground wells and interconnections
The region draws on a network of underground wells at Guadalmansa (Estepona), Fuengirola, Aljaima and Fahala. Aqueduct tunnels built after the 1990s drought connect rivers Guadaiza, Guadalmansa and Guadalmina to La Concepción reservoir, adding supply diversity. Emergency interconnections between reservoir systems allow water transfers between the western Costa del Sol, Málaga city and the Axarquía.
7. What This Means for Property Buyers
Water supply is increasingly a factor that informed property buyers consider when choosing a location in southern Spain. Here is the reassuring picture for the Costa del Sol:
Key takeaways for property buyers
- Reservoirs at approximately 83% capacity – a substantial buffer covering well over a year of consumption
- Multiple water sources: reservoirs, desalination, underground wells and water reuse create a diversified, resilient system
- No restrictions affecting daily life – pools, gardens and showers operate normally
- Ongoing investment in new desalination capacity, efficiency measures and pipeline interconnections
- Climate-independent backup: desalination provides water regardless of rainfall patterns
That said, it is worth understanding the climate context. The Mediterranean climate means dry summers are normal, and climate change is making rainfall patterns more unpredictable. The current surplus is substantial, but long-term sustainability depends on continued infrastructure investment and responsible water use. This is exactly why the region is investing heavily in desalination – providing a supply that does not depend on the weather.
For property buyers, the message is clear: the Costa del Sol’s water supply is in excellent shape, backed by robust infrastructure and ongoing investment. After years of drought headlines, 2026 marks a welcome turning point.
8. Water Quality on the Costa del Sol
Beyond supply, many international buyers ask about water quality. All tap water across the Costa del Sol’s 14 municipalities is certified safe to drink (APTA) by the Spanish Ministry of Health and complies with EU Drinking Water Directive standards. Water quality is regularly tested and published through the national SINAC database.
The main characteristic of local water is hardness. The limestone geology of the Sierra de las Nieves and surrounding mountains naturally dissolves calcium and magnesium into the groundwater. This is completely safe but can affect taste and cause limescale build-up in appliances. Many residents use simple carbon filter jugs or install water softeners for improved taste and appliance longevity.
9. Outlook: What to Expect in 2026 and Beyond
Experts predict no major water restrictions in 2026 if average rainfall continues. The combination of high reservoir levels and desalination backup means the Costa del Sol is better positioned for water security than at any point in the past five years.
Authorities are now focused on two fronts: monitoring dam levels carefully and managing controlled releases to prevent flooding, while also planning further infrastructure expansion. A new desalination plant for the Axarquía region is in the planning stage, and expanded pipeline connections between systems are under development.
Water reserves across Andalucía show consistent improvement year-on-year, with region-wide capacity at 77% – far above the 42% ten-year average. While climate variability and population growth pose long-term challenges, the current investment trajectory and diversified supply strategy provide strong grounds for confidence.
10. Frequently Asked Questions
Are there water restrictions on the Costa del Sol in 2026?
No major restrictions are currently in place. The western Costa del Sol and Málaga city are classified in “normal” water status. Daily allocations are set above actual consumption levels, and swimming pools, garden watering and all normal water use are permitted.
Is the tap water safe to drink on the Costa del Sol?
Yes. All tap water across the 14 Costa del Sol municipalities is certified safe to drink (APTA) and meets EU Drinking Water Directive standards. The water tends to be hard due to limestone geology, which affects taste but is perfectly safe. Many residents use filter jugs for improved taste.
Which reservoirs supply Marbella and the Costa del Sol?
La Concepción reservoir on the Río Verde is the primary supply for Marbella and the western Costa del Sol. The Guadalteba and Guadalhorce reservoirs supply Málaga city, while La Viñuela serves the Axarquía (eastern Costa del Sol). The Marbella desalination plant provides additional backup supply.
Should water supply affect my property buying decision?
Water supply is a sensible factor to consider, but the Costa del Sol is well-positioned. Near-record reservoir levels, operational desalination plants, underground wells and water reuse infrastructure give the region multiple, diversified water sources. Ongoing investment in new desalination capacity further strengthens the long-term outlook.
Will there be enough water for the summer tourism season?
Yes. Current reservoir levels provide a substantial buffer well above what is needed for peak summer demand. Experts do not anticipate restrictions for the 2026 summer season. Desalination plants provide additional backup capacity during the dry months.
How does the Costa del Sol’s water situation compare with other parts of Spain?
Málaga province is in a strong position relative to much of Andalucía. Provinces like Granada (~25%) and Jaén (~33%) have lower reservoir levels. The Costa del Sol benefits from multiple supply sources including desalination, while some inland areas rely solely on reservoirs. Nationally, Spain’s reservoirs are at approximately 56% of capacity.
What happened during the drought and could it happen again?
From 2022 to early 2025, southern Spain experienced severe drought with reservoir levels falling below 20% in some areas. Strict water restrictions were imposed, including bans on pool fills and garden watering. While drought could return – it is a natural feature of the Mediterranean climate – the region is investing heavily in desalination and infrastructure to reduce dependence on rainfall.
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