Natural Gas Stocks Injection in Spain decreased to 21.74 GWh/d on Saturday April 11 from 133.40 in the previous day. Natural Gas Stocks Injection in Spain averaged 26.03 GWh/d from 2011 until 2026, reaching an all time high of 142.57 GWh/d in April of 2026 and a record low of 0.00 GWh/d in January of 2011.