Portodemouros reservoir

Pontevedra · Galicia

Galicia Costa basin Reservoirs in GaliciaHydroelectric

Province: Pontevedra
Basin: Galicia Costa
River: Ulla
Dam: Embankment, clay core · 1967

42.4%

Current level

126 hm³

Stored water

297 hm³

Total capacity

-6.0 hm³

Weekly change

+38.0 hm³

Vs. 2025

-34.0 hm³

Vs. 10-year mean

Historical trend

Stored water volume · hm³

hm³

Weekly summary

The Portodemouros reservoir (embalse de Portodemouros), in the Galicia Costa basin and linked to Arzua y Vil Ade Cruces, Pontevedra and Galicia, is at 42.4% of its capacity, holding 126 hm³ against a maximum capacity of 297 hm³. It is currently falling, by 6.0 hm³ this week.

Compared with 2025: above (+12.8 points). Compared with the recent historical mean: below (-11.4 points).

Its main uses include water supply and hydroelectric power.

References
Reference	Level	Difference
Previous week	44.4%	-2.0 pts
Same week 2025	29.6%	+12.8 pts
10-year mean	53.9%	-11.4 pts

Technical data

Characteristics of the dam and its recorded uses.

Characteristics

Municipality: Arzua y Vil Ade Cruces
River: Ulla
Dam type: Embankment, clay core
Year built: 1967
Surface area: 1,204.98 ha
Upstream: — no data
Downstream: No

Recorded uses

Water supply
Electricity
Fishing
Boating
Swimming

Not recorded: irrigation, industrial, picnic, restaurants.

Source: MITECO Inventory of Dams and Reservoirs.

Data: MITECO · AEMET