Key Takeaways:
OPEC lowered its 2026 global oil demand growth forecast to 970,000 barrels a day, the second consecutive reduction, as the Iran war and Strait of Hormuz closure reshape energy supply and consumption patterns.
"The global economic performance in the first half of 2026 has remained resilient, despite ongoing geopolitical tensions," OPEC said in its monthly oil market report, leaving its economic growth forecasts unchanged.
The 970,000 bpd figure is down from the 1.17 million bpd projected last month. India and the Middle East were the main drags, with demand growth forecasts cut by 60,000 bpd and 40,000 bpd respectively. OPEC+ crude output averaged 33.13 million bpd in May, down 190,000 bpd from April, with Iran posting the biggest decline as a U.S. blockade sharply reduced its exports.
The dual shock of constrained supply and weakening demand creates a complex backdrop for global energy markets. While OPEC sees consumption rebounding — raising its 2027 demand growth forecast to 1.73 million bpd — both the U.S. Energy Information Administration and the International Energy Agency expect oil demand to decline this year, highlighting the divergence in outlooks.
OPEC vs. Western Forecasters Diverge on War Impact
The gap between OPEC and Western forecasters reflects fundamentally different assumptions about how long the Strait of Hormuz disruption will last. The waterway, through which roughly a fifth of global oil passes, has been effectively closed since the Iran war began in March, curbing millions of barrels of Middle East output. OPEC estimates that Middle East oil consumption in March fell by about 500,000 bpd from a year earlier, attributing the decline to "prevailing oil market conditions."
The supply disruption has also upended OPEC+'s production plans. The group had agreed to resume output increases from April, but the Strait of Hormuz closure has made it impossible to lift production. OPEC+ output fell further in May, with the 33.13 million bpd average representing a 190,000 bpd decline from April. Iran accounted for the largest drop, as tanker-tracking data showed its exports falling to the lowest level in six years amid the U.S. blockade.
The May figures include production from the United Arab Emirates, which formally left OPEC and OPEC+ on May 1. The departure of the UAE, one of the group's largest producers, adds another layer of complexity to the alliance's strained cohesion.
Fuel Prices Feed Through to Broader Economy
For consumers, the supply crunch has translated into surging fuel prices that are now feeding through to broader economic indicators. U.S. producer prices posted their largest annual gain in 3½ years in May, driven by the jump in energy costs. The pass-through to consumer prices is likely to keep central banks cautious on rate cuts, even as higher fuel costs dampen industrial activity.
The last time OPEC faced a comparable supply-demand disconnect was during the 2020 pandemic, when demand collapsed by roughly 20 million bpd and the group slashed output by a record 9.7 million bpd. The current situation differs in nature — supply is being physically blocked rather than voluntarily curtailed — but the economic consequences may prove similarly far-reaching.
If the Strait of Hormuz remains closed through year-end, the IEA has warned that global oil supply could fall below demand, drawing down inventories to multi-decade lows. OPEC's more optimistic 2027 demand forecast of 1.73 million bpd assumes a resolution to the conflict that allows consumption to rebound. For now, the gap between those two scenarios defines the range of outcomes for oil markets.
This article is for informational purposes only and does not constitute investment advice.
