Natural Gas Stocks Injection in Portugal decreased to 22.19 GWh/d on Saturday August 22 from 22.95 in the previous day. Natural Gas Stocks Injection in Portugal averaged 4.97 GWh/d from 2011 until 2026, reaching an all time high of 51.94 GWh/d in January of 2018 and a record low of 0.00 GWh/d in January of 2011.