Europe’s Gas Cushion Is Thinner as Winter Approaches

Europe is entering the final stretch of the summer gas-filling season with storage levels significantly below last year, while high prices are making the remaining refill increasingly expensive. EU gas storage facilities were around 62% full on 20 August, compared with roughly 74% at the same point in 2025.

The gap matters because storage is one of the main buffers protecting Europe from sudden changes in demand or supply during winter. The European Commission says there is currently no immediate threat to gas supplies, but the slower refill is leaving the bloc with less room for error as the 2026–27 heating season approaches.

The problem is not simply a lack of gas

Europe has access to a much more diversified supply system than it had before the energy crisis triggered by Russia’s full-scale invasion of Ukraine. LNG, Norwegian pipeline gas and other suppliers have replaced much of the Russian gas that once dominated the European market.

The vulnerability has shifted instead to the global LNG market. Europe is competing with Asian buyers for cargoes at a time when geopolitical disruptions have tightened international supply. LNG flows have increasingly been redirected towards Asia, where buyers are willing to pay more to compensate for disruptions to other sources of gas.

That competition is feeding directly into European prices. Gas prices have risen sharply since the escalation of the conflict involving Iran, reaching levels that make it less attractive for companies to purchase gas now and inject it into storage. The result is a difficult feedback loop: high prices discourage storage injections, while low storage levels increase the market’s sensitivity to future supply shocks and winter demand.

Europe has less room to wait

The current situation is a consequence of how the continent entered the summer. European storage was only around 28% full at the beginning of April after a winter that required substantial withdrawals. By 1 August, storage had reached just 57.1%, a historically weak level for that point in the year.

That left traders and governments with a much larger volume to replenish during the summer months. The European Commission’s own assessment earlier this year found that the EU’s infrastructure could support storage reaching at least 80% by 1 November, but that outcome depended heavily on the availability of LNG.

The regulatory framework also gives governments more flexibility than during the original energy crisis. EU rules now provide a two-month window, from 1 October to 1 December, to meet the 90% storage target, while countries can deviate from the indicative filling trajectory when market conditions or technical constraints make compliance difficult.

That flexibility reduces the risk of governments forcing companies to buy gas at the most expensive moment. It does not, however, remove the underlying market problem.

The cost of rebuilding the buffer

Europe’s challenge is increasingly about the price of security rather than the physical existence of supply.

If gas remains expensive through the autumn, European companies will have to decide whether to absorb the cost of filling storage or risk entering winter with a smaller cushion. Neither option is attractive. Buying aggressively could push prices even higher, while delaying purchases would leave Europe more exposed to a cold winter, unexpected infrastructure failures or another disruption to global LNG flows.

The market is already reflecting that risk. European gas prices recently reached their highest levels since early 2023, while storage remained well below the levels seen in previous years.

This also matters beyond heating. Gas remains an important source of flexibility for Europe’s electricity system, particularly when renewable generation is insufficient. Higher gas costs therefore have the potential to feed into electricity prices and broader inflation, adding another layer of pressure on households and energy-intensive industries. The European Commission has previously noted that gas can still set electricity prices in a significant share of European markets.

A different European energy vulnerability

The emerging gas squeeze is different from the crisis Europe faced four years ago. The immediate threat is no longer a single supplier cutting pipeline deliveries. Instead, Europe is exposed to a global market in which LNG cargoes can move towards whichever region offers the strongest price.