Natural Gas Stocks Injection in Spain remained unchanged at 0 GWh/d on Thursday September 4. Natural Gas Stocks Injection in Spain averaged 26.37 GWh/d from 2011 until 2025, reaching an all time high of 128.11 GWh/d in July of 2025 and a record low of 0.00 GWh/d in January of 2011.