January 20, 2026. The use of liquefied natural gas (LNG) as a fuel for maritime propulsion continues to accelerate in the Iberian Peninsula. According to data compiled by Gasnam, in 2025, LNG supply to ships in Spanish ports exceeded 8.1 TWh, more than quadrupling the volume recorded just two years prior. In terms of energy consumption, the LNG and Bio-LNG loaded last year is equivalent to filling the tanks of approximately 16 million cars.
This growth is due, on the one hand, to the increasing number of LNG-powered vessels joining the international fleet and, on the other, to the progressive development of bunkering infrastructure, which has allowed Spanish ports to consolidate their position as key hubs for the supply of alternative fuels.
One particularly relevant fact is that 12% of the LNG supplied in 2025 was already of renewable origin (Bio-LNG), representing a significant step towards reducing emissions and achieving climate neutrality in maritime transport.
This growth in supply has been accompanied by a structural change in the bunkering model. In the last year, Ship-to-Ship (STS) operations have increased from 44% to 80% of the total, consolidating their position as the dominant option compared to other formats, due to their greater flexibility and operational efficiency.
Portugal also marked a significant milestone in 2025 with the effective commencement of LNG bunkering to ships. A total of 342 GWh were supplied across 13 operations, primarily concentrated in STS operations at the port of Sines, reinforcing the Iberian Peninsula’s role as a strategic hub for LNG bunkering.
