Why the Hormuz Reopening Means Weeks of Constrained Shipping, Not Instant Relief

After more than three months of disruption, the Strait of Hormuz is moving toward a fragile reopening, but a full return of global energy flows remains weeks away. The United States and Iran announced a preliminary agreement on June 14, 2026, with a formal memorandum of understanding scheduled to be signed in Geneva on June 19. The deal is expected to lift the American naval blockade and restore commercial shipping through the waterway that carries roughly 20 percent of the world's seaborne crude. Yet the announcement marks the start of a recovery rather than its conclusion.

The disruption began on February 28, 2026, when conflict erupted in the region, and Iran halted normal traffic through the strait shortly after. A US-led aerial campaign launched on March 19 aimed to reopen the passage, followed by a full naval blockade of Iran on April 13. Throughout this period, transit collapsed. Shipping data showed daily passages falling to around 10 vessels during the first week of June, compared with more than 100 per day before the crisis. The chokepoint stayed effectively closed for over 100 days.

Even with the agreement in place, physical normalization of shipping will take far longer than the political settlement. Mine clearance is the central obstacle. Iranian forces are expected to clear sea mines during the first 30 days, and no tolls will be charged to vessels during the initial 60-day window. Pentagon estimates suggest full minesweeping operations could take up to six months, even with three dedicated minesweeping vessels already positioned in the region. France, Germany, Italy and the United Kingdom have offered a defensive mission to support commercial shipping and conduct mine clearance.

Industry experts caution that traffic will return as a trickle rather than a flood. Initial transits are likely to move through escorted convoys instead of free navigation, and the first vessels through will mostly be ships evacuating the Gulf after months stranded since late February. Beyond mines, the recovery faces a dual backlog. A large number of ships have been idle at sea for months, crews urgently need rotation and rest, and long-idle hulls coated with algae and barnacles will move more slowly, reducing transit efficiency. Several weeks of work, and in some cases months, will be needed before operations normalize.

The transmission lag through the oil supply chain means relief at the pump will arrive later still. Even with an immediate full reopening, crude, liquefied natural gas and fertilizer must complete the entire maritime and refining cycle before reaching consumers. Analysts estimate it takes around 52 days for crude to load in the Gulf, ship to Asian markets and finish refining. On that basis, if the strait fully reopens by late June, meaningful relief in crude supply pressure would not appear until late August, with a true supply-demand balance unlikely before September. Global markets will keep drawing down existing inventories through July and August, deepening an already fragile buffer.

Oil field recovery across the Middle East is uneven, and some capacity may be lost for good. Daily crude output in the region was cut by more than 11 million barrels compared with pre-war levels. Projections suggest only about half of Gulf fields can restore pre-war capacity within two weeks, roughly 80 percent within six weeks, and the remaining fifth, concentrated in Iraq and Kuwait, may never fully recover. Iraq faces the hardest road. Large-scale evacuation of foreign workers and material shortages have stalled damage assessments, and heavy oil wells clog with paraffin and asphalt deposits, cutting output. Forecasts indicate southern Iraqi fields could take a full nine months to reach 85 percent of their pre-war capacity.

Global oil inventories have been heavily drawn down. Analysts estimate that between 1 billion and 1.5 billion barrels have left global stocks since the war began on February 28, through both production cuts and transit disruption. A coordinated International Energy Agency release of more than 400 million barrels, including 172 million from the US Strategic Petroleum Reserve, has only partly offset the shortfall. For the week ending June 12, the US reserve fell by another 8.9 million barrels to 340.3 million barrels, the lowest level since 1983 and below the previous drawdown low of 2023. At the current release pace, the authorized quota could be exhausted by early September, after which the market loses the cushion of strategic reserves.

Prices have already moved sharply on the news. Brent crude fell more than 4 percent on June 15 and slipped further the following day toward $80 per barrel, the lowest since early March and the longest losing streak of the year, as traders priced in the prospect of recovering supply. At the peak of the crisis Brent had traded above $114. Even so, prices remain well above the pre-war level near $72, and analysts warn that returning to the $60s could take a year or more of uninterrupted flows to rebuild inventories. Several OPEC+ members agreed to raise July output, and Saudi Arabia and others are expected to push toward maximum production once the strait reopens, both to rebuild stocks and to ease pricing pressure.

The agreement also remains conditional. The Geneva memorandum opens a 60-day negotiation window covering uranium enrichment limits, Iran's enriched stockpiles, sanctions relief and reconstruction funding. A breakdown in those talks could send the strait back into crisis and reverse the price relief. For supply chain managers, the message is clear. The reopening is real, but the recovery will be gradual, fragile and stretched across the summer rather than resolved overnight.