Natural Gas Stocks Injection in Portugal decreased to 0 GWh/d on Sunday March 29 from 4.50 in the previous day. Natural Gas Stocks Injection in Portugal averaged 4.92 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.