El Nino Forecast Offers Partial Winter Relief for UK Power Prices
Analysts told Montel this week that an unusually strong El Nino pattern could bring milder, windier conditions to the UK, tempering but not reversing elevated winter energy costs.
Rising UK energy prices could get at least some relief over winter from likely milder and windier conditions influenced by an unusually strong El Nino weather pattern, analysts told Montel during the week of 2026-09-21.4
UK power front-quarter prices stood at £147.14/MWh and the calendar-year-ahead contract at £114.93/MWh on Wednesday (2026-09-23), levels that reflect a market still pricing in significant supply-side risk rather than seasonal optimism. ICE Endex TTF front-month gas, the European benchmark that drives UK power generation costs through gas-to-power dispatch, held at €73.37/MWh in early European trading on Wednesday (2026-09-23).4
The supply environment into which any El Nino relief lands is far from comfortable. European gas prices have risen roughly 40% above pre-war levels following disruption to global LNG supply chains after Iranian missile attacks on Qatar's LNG production and export infrastructure wiped approximately 20% of global LNG capacity, according to data cited by OilPrice.com. The closure of the Strait of Hormuz and broader Middle Eastern geopolitical escalation have restructured the price floor across European hubs.2
Offshore Energies UK told Montel in the week of 2026-09-14 that the UK faces a "very difficult winter" and urged that domestic energy resources be brought online "as soon as possible," describing timing as "critical." A mild winter reduces demand but does nothing to restore lost LNG supply or accelerate domestic resource development.3
El Nino typically affects UK winter conditions through two related channels: above-average temperatures that suppress heating demand and enhanced Atlantic wind patterns that increase renewable generation, both reducing the hours during which gas-fired plants set marginal power prices. But weather forecasts months out carry meaningful uncertainty, and a cold snap within an otherwise mild winter can still produce sharp price spikes.
The UK's structural dependence on gas-fired generation keeps the link between TTF and domestic power prices tight regardless of seasonal weather. An analyst told Montel on Tuesday (2026-05-19) that decoupling UK electricity and gas prices through wholesale market reform would be unlikely to deliver lower consumer bills, pushing back against renewed political interest in restructuring how power is priced.1
Warmer seasonal averages reduce total gas consumption, but El Nino weather cannot offset the supply constraints traders have been pricing in for months. Offshore Energies UK's warning about a "critical" window for bringing domestic resources online underscores that demand-side softening, however welcome, leaves the supply side unresolved.3
European storage figures clarify the scale of the supply problem. German gas storage was only 30.6% full as of May 27 (2026-05-27), well below the 38.65% recorded at the same point in 2025, according to Gas Infrastructure Europe data cited by OilPrice.com. Uniper chief executive Michael Lewis warned at that time that storage shortfalls would create "a problem next winter" if filling rates did not accelerate.2
Heating oil futures fell 2.07% on Wednesday (2026-09-23), a move broadly consistent with mild-weather demand expectations. Yet VIX gained 8.30% in the same session, indicating that broader market risk appetite was deteriorating even as energy-demand signals edged lower — a tension worth tracking for traders who might otherwise read the heating oil move in isolation.
For UK power traders, the question into winter is how much weather-driven demand reduction can offset price pressure from a structurally constrained European gas market still absorbing the loss of roughly a fifth of global LNG supply.2 A mild, windy October and November reduces that pressure. A cold December does not, and storage levels across the continent leave limited buffer if gas demand spikes unexpectedly. The next concrete signal will be early winter temperature and wind anomaly data measured against the El Nino baseline forecasts analysts cited during the week of 2026-09-21.4,3