Ibiza Water Reserves Remain at 33% Despite October Rainfall Three Times Above Average

08 November 2026 г.

Ibiza's water reserves remained at 33% at the end of October 2026, despite the island recording exceptionally high rainfall during the month. According to figures published by the Balearic Government, the island received an average of 232 litres of rain per square metre, approximately three times its usual October rainfall.

The figures highlight the contrast between the substantial precipitation recorded across Ibiza and the lack of improvement in its reported water reserves.

The latest data were released on 7 November by the Balearic Government's Department of the Sea and Water Cycle as part of its monthly assessment of water resources and drought conditions across the archipelago.

Ibiza Records 232 Litres of Rain per Square Metre

October was an unusually wet month across the Pitiusas, with Ibiza receiving an average of 232 litres per square metre, compared with the usual 77 litres for this period.

This represents approximately three times the island's typical October rainfall.

Formentera also recorded significantly higher-than-average precipitation, with 213 litres per square metre compared with its usual 44.

Across the Balearic Islands, average rainfall reached 105 litres per square metre, against a historical reference of 79 litres. This represents an increase of 33%.

The distribution varied between islands. Mallorca recorded 93 litres per square metre, above its usual 80, while Menorca received 62 litres, slightly below its reference average of 67.

Water Reserves in Ibiza Remain Unchanged

Despite the heavy rainfall, Ibiza's water reserves remained at 33%, the same level recorded in September.

Mallorca and Menorca experienced a slight improvement during October. Mallorca's reserves increased from 36% to 37%, while Menorca rose from 38% to 39%.

As a result, the overall water reserves across the Balearic Islands increased from 36% to 37%.

However, the archipelago's position remains weaker than a year earlier. In October 2025, the combined water reserves stood at 44%.

The latest figures show that the heavy rainfall recorded in Ibiza has not yet been reflected in an increase in the island's reported water reserves. The monthly government announcement does not identify a specific technical reason for this lack of change.

Ibiza Remains in Pre-Alert for Drought

Ibiza continues to be classified under the pre-alert drought scenario, despite the exceptionally wet October.

The Balearic Government's hydrological drought assessment identifies three demand units in the alert category: Artà, es Pla and Manacor-Felanitx. Together, these areas represent 22.5% of the archipelago's territory.

Six other demand units remain in pre-alert: Menorca, Migjorn, Palma-Alcúdia, Tramuntana Nord, Tramuntana Sud and Ibiza. They account for 75.9% of the territory.

Formentera is the only demand unit classified as being in a normal situation, representing the remaining 1.6%.

Two changes in drought classification took place during October. Migjorn moved from alert to pre-alert, while Tramuntana Sud moved from normality to pre-alert.

Despite these changes, the overall geographical distribution of the different drought scenarios remained unchanged.

Hydrological Drought Index Rises

The hydrological drought index for the Balearic Islands increased from 0.342 in September to 0.371 in October.

This figure is also higher than the October readings for the previous two years. The index stood at 0.349 in October 2025 and 0.367 in October 2024.

The figures indicate that the regional hydrological situation has not improved in line with the rainfall recorded during October.

Rainfall Over the Past Year Exceeds the Historical Average in the Pitiusas

Looking beyond October, the accumulated rainfall over the previous 12 months provides another perspective on the islands' recent weather conditions.

Across the Balearic Islands, rainfall reached 98% of the historical average. Mallorca stood at 97% and Menorca at 94%.

The Pitiusas, comprising Ibiza and Formentera, recorded 105% of their historical average.

October was also a warmer-than-usual month across the archipelago. The average temperature reached 20°C, representing a positive anomaly of 1.2°C compared with normal values.

Government Expects Water Reserves to Rise During November

Looking ahead, the Department of the Sea and Water Cycle expects water reserves across the Balearic Islands to increase during November, taking into account the current hydrological situation and the time of year.

However, the administration does not anticipate changes to the existing drought classifications of the different demand units during the month.

The regional department will continue monitoring water resources, particularly in areas that remain under drought alert, while reiterating the importance of responsible water consumption.

For Ibiza, the latest figures underline an important distinction: exceptionally high rainfall does not automatically translate into an immediate recovery in reported water reserves. Despite receiving around three times its usual October rainfall, the island ended the month at the same 33% level recorded in September.

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