Natural Gas Stocks Injection in Portugal increased to 26.45 GWh/d on Thursday April 2 from 13.79 in the previous day. Natural Gas Stocks Injection in Portugal averaged 4.93 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.