Natural Gas Stocks Inventory in Greece increased to 1.85 TWh on Friday March 13 from 1.70 in the previous day. Natural Gas Stocks Inventory in Greece averaged 0.84 TWh from 2012 until 2026, reaching an all time high of 4.33 TWh in August of 2017 and a record low of 0.05 TWh in November of 2018.