Natural Gas Stocks Injection in Spain increased to 21.85 GWh/d on Tuesday February 10 from 0 in the previous day. Natural Gas Stocks Injection in Spain averaged 25.93 GWh/d from 2011 until 2026, reaching an all time high of 128.11 GWh/d in July of 2025 and a record low of 0 GWh/d in January of 2011.