23 reservoirs with a combined capacity of 2,846 hm³ · latest official reading: 6 October 2026
The Júcar basin is currently at 51.9 % of capacity, far above normal for the time of year. The week-41 average across 38 years of records is 31.4 %, a difference of +20.5 points.
For context: a year ago it stood at 48.8 % and a month ago at 53.5 %. Against last week’s reading it is essentially flat (−0.1 points).
Blue line: average monthly filling for the whole demarcation since 1988. The dot marks today’s reading, 51.9 % in October.
With 2,023 weeks of record since 1988, the average pattern of the Júcar basin is clear: it peaks in May at 43.3 % and bottoms out in October at 31.3 %. That 12-point range makes it a moderately seasonal demarcation.
The highest reading in the whole series is 68.3 %, on 21 April 2026, and the lowest 7.1 %, on 27 September 1994. Comparing today against those two extremes says more than the bare percentage: 50 % is comfortable in a demarcation that rarely tops 60 %, and worrying in one that usually reaches summer full.
By capacity it is the 7th demarcation of the 14 covered by the hydrological bulletin: its 2,846 hm³ account for 5.1 % of everything Spain can store in mainland reservoirs. Today it holds 1,476 hm³.
The 23 dams the hydrological bulletin tracks in the Júcar basin, sorted by capacity. Linked names have their own page with the full record.
| Reservoir | Capacity (hm³) | Volume (hm³) | Fill | Δ week | Use |
|---|---|---|---|---|---|
| Alarcón | 1,118 | 798 | 71.4 % | +0.1 | Irrigation / supply |
| Tous | 379 | 42 | 11.1 % | −0.3 | Irrigation / supply |
| Contreras | 361 | 247 | 68.4 % | −0.8 | Irrigation / supply |
| Benagéber | 221 | 80 | 36.2 % | +0.5 | Irrigation / supply |
| Arenós | 137 | 52 | 38.0 % | +0.0 | Irrigation / supply |
| Cortes II | 118 | 109 | 92.4 % | −0.8 | Hydropower |
| Escalona | 99 | 5 | 5.1 % | +0.0 | Irrigation / supply |
| Loriguilla | 73 | 22 | 30.1 % | +0.0 | Irrigation / supply |
| Bellús | 69 | 11 | 15.9 % | +1.4 | Irrigation / supply |
| Sichar | 49 | 15 | 30.6 % | +0.0 | Irrigation / supply |
| Forata | 37 | 17 | 45.9 % | +0.0 | Irrigation / supply |
| El Naranjero | 29 | 22 | 75.9 % | −10.3 | Irrigation / supply |
| Beniarrés | 27 | 6 | 22.2 % | +0.0 | Irrigation / supply |
| Arquillo de San Blas | 21 | 14 | 66.7 % | +0.0 | Irrigation / supply |
| La Muela | 20 | 10 | 50.0 % | +20.0 | Hydropower |
| María Cristina | 18 | 5 | 27.8 % | +0.0 | Irrigation / supply |
| Amadorio | 16 | 4 | 25.0 % | +0.0 | Irrigation / supply |
| Guadalest | 13 | 3 | 23.1 % | +0.0 | Irrigation / supply |
| Ulldecona | 11 | 7 | 63.6 % | −9.1 | Irrigation / supply |
| La Toba | 10 | 4 | 40.0 % | +0.0 | Hydropower |
| Buseo | 8 | 1 | 12.5 % | +0.0 | Irrigation / supply |
| Algar | 6 | 0 | 0.0 % | +0.0 | Irrigation / supply |
| Regajo | 6 | 2 | 33.3 % | +0.0 | Irrigation / supply |
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The figures on this page come from the official MITECO reservoir archive, the same database behind Spain’s weekly hydrological bulletin. The bulletin covers every mainland reservoir above 5 hm³ of capacity and is published every Tuesday with Monday’s reading.
The latest reading here is from 6 October 2026, and the comparison series starts in 1988. Nothing is estimated, interpolated or forecast: the percentage is stored volume divided by the usable capacity the bulletin itself assigns to the dam. Historical averages are computed over the same calendar week in every previous year, the only fair comparison in a system with such marked seasonality.
National summary and reservoir search on Reservoirs of Spain.
