Greece’s national transmission system received about 7.3 TWh of gas in August 2026. Of that total, roughly 3.73 TWh, or 51.1%, entered through Sidirokastro on the Bulgarian border.
Across January to August, total imports were approximately 57 TWh. The Sidirokastro route accounted for about 22.5 TWh, representing roughly 39.5% of the period’s total, with volumes broadly unchanged versus the same months of 2025.
Russian pipeline deliveries and contract end dates
The planned EU phase-out is set against a supply mix in which Russian pipeline gas retained a large market share. In August 2026, Russian pipeline gas supplied just over half of Greece’s gas imports, creating a substantial replacement requirement ahead of the phase-out.
Under existing long-term contracts, Russian pipeline deliveries are scheduled to end on September 30, 2027. A limited possible extension to November 1 applies where storage security is at risk.
Long-term LNG contract expiry and replacement needs
Long-term Russian LNG contracts are scheduled to end from January 1, 2027. Greece therefore needs to replace a sizeable supply stream while maintaining gas availability for electricity generation and other consumers.
The continued scale of deliveries entering through Bulgaria means diversification will require firm alternative volumes and transport capacity. This is in addition to expanding access to additional suppliers.
