Andorra River Flows Below Average All Summer, Deficits Hit 52% in July
Andorra's rivers recorded below-average flows throughout summer 2026, per the Water Resources Monitoring Bulletin, with significant deficits raising concerns for water supplies if autumn rains fail to materialize.
Key Points
- Flows at A403 station: June 7.5 m³/s (25% deficit), July 2.5 m³/s (52% deficit), August 2 m³/s (25% deficit).
- June exceeded 2025's 6 m³/s but missed 11.5 m³/s decade average; July and August below both prior year and average.
- Early 2026 positive anomalies shifted to deficits from June; August neared normal but risks persist without fall rains.
- Researcher Oriol Travesset: No consistent pattern, 25% August deficit not alarming yet but late summer vulnerable.
River flows in Andorra stayed below the 2016-2025 reference average across all three summer months, the 2026 Water Resources Monitoring Bulletin shows.
At the A403 station in Borda Sabater, deficits reached 25% in June, 52% in July, and 25% in August. June flows hit 7.5 cubic metres per second, exceeding last year's 6 cubic metres per second but falling short of the 11.5 cubic metres per second decade average. July registered 2.5 cubic metres per second, down from 3.5 in 2025 and the 4.5 average. August recorded 2 cubic metres per second, against 3 cubic metres per second both last year and on average.
AR+I researcher Oriol Travesset said the year's flows showed no consistent pattern. Early months generally posted positive anomalies with slightly elevated levels, continuing into May. Readings then dipped below normal from June, with June and July especially low, though August values moved nearer to typical despite the ongoing gap.
Travesset called the current 25% August deficit non-alarmist, noting some prior years had even lower flows at this stage. He warned, however, of risks in the weeks ahead. Late summer and early autumn could challenge water supplies if fall rains do not arrive, potentially extending low levels through September and into October.
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