Observed Hormuz Commodity-Vessel Traffic Falls 80% to 3 Ships

Key Facts

Preliminary Kpler data showed that only 3 commodity vessels crossed the Strait of Hormuz during a 24-hour period ending Tuesday, confirming that observable traffic remained exceptionally weak. The count was 80% below the previous 10-day average of about 15 transits a day. It does not capture every ship physically using the waterway, only vessels that could be followed through the Automatic Identification System, or AIS. The more precise conclusion is therefore that observable commodity-vessel traffic fell sharply, not that all Hormuz shipping collapsed. Even with that limitation, the reading matters because it indicates that a large share of the trackable commercial fleet is still avoiding normal passage patterns.

Tuesday's count was also below the 4 vessels observed on Monday, suggesting the prior day's limited improvement did not develop into a sustained recovery. All 3 vessels in Tuesday's group were outbound from the Gulf, with no inbound vessel included in that daily sample. The outbound traffic included 1 Panamax oil tanker, while the inspected report did not specify the remaining vessels' cargoes in detail. Direction matters because outbound ships may represent cargoes leaving Gulf ports, but it does not establish that replacement vessels are continuing to enter. Vessel counts also cannot be translated directly into barrels because cargo capacity varies by ship class, loading status and route.

Observable traffic at Bab el-Mandeb was steadier, with 22 commodity vessels moving in both directions during the same day. That compared with an average of about 26 vessels a day over the previous 10 days, a less severe gap than the one recorded at Hormuz. The comparison shows that pressure is not affecting every regional passage in the same way or to the same degree. Hormuz and Bab el-Mandeb serve partly different routes, however, so activity at one cannot be treated as a direct replacement for weakness at the other. Bab el-Mandeb still matters because it determines whether cargoes moving to or from the Red Sea can reach the Suez Canal or the Indian Ocean.

Kpler's tracking excludes vessels that switch off AIS equipment, whether to reduce the chance of detection or for other operational and security reasons. That limitation means the observed count may be lower than actual traffic, particularly when danger encourages ships to operate without public signals. The figures are also preliminary and can change if delayed signals appear or a vessel's route or cargo classification is revised. The decline should therefore be treated as a real-time indicator of weak visible traffic, not a final estimate of how much oil or gas has stopped moving. Stronger confirmation would require several days of consistently low counts aligned with loading and discharge volumes at regional ports.

Data from the U.S. Energy Information Administration, or EIA, explain why energy markets are sensitive to Hormuz disruptions even when a single day's tracking is incomplete. Oil flows through the strait averaged 20.9 million barrels a day in the first half of 2025, equal to about 20% of global petroleum-liquids consumption and 25% of seaborne oil trade. Liquefied-natural-gas, or LNG, flows also averaged 11.4 billion cubic feet a day, representing more than 20% of global LNG trade. Those historical volumes do not describe current flows, but they define the scale of exposure markets attempt to price when reliable transit deteriorates. They also explain why navigation and insurance risk can affect crude, gas and freight before a physical shortage becomes visible in inventories.

Saudi Arabia began restarting its East-West Pipeline at reduced rates on September 22 after drone attacks forced a shutdown, restoring part of the export route to the Red Sea port of Yanbu. The network moves crude from the kingdom's east to its west coast without using Hormuz. EIA estimates that the East-West and Abu Dhabi pipelines together provide about 4.7 million barrels a day of bypass capacity. That capacity remains far smaller than historical Hormuz oil flows, while a partial restart does not make nameplate capacity immediately available. The restart therefore reduces some operational risk but does not remove supply exposure to security at Hormuz or along Red Sea routes.

A shipping shock can reach energy prices through several channels, and none requires a complete halt in physical supply. A higher probability of attack or delay prompts shipowners and insurers to demand more compensation, increasing the cost of moving each barrel even when the cargo ultimately arrives. Fewer ships willing to transit can delay loading and discharge schedules, tighten available tanker capacity and widen regional price differentials. Pipelines, inventories and rerouting can offset some physical losses, however, so a lower vessel count does not mechanically dictate one price direction. For investors, the decisive distinction is whether weak traffic data develop into a sustained reduction in exported volumes or remain a product of voyage timing and missing AIS signals.

Kpler's July 2026 history provides useful context for the volatility of daily observations and the danger of extrapolating one count into a lasting trend. The post-MOU, pre-July-escalation baseline was about 33 commodity-vessel transits a day on a 10-day moving-average basis. The average had been about 15 daily transits in the first half of June and 9 a day in May before falling below 5 again on July 22. Counts then improved briefly before the rebound faded, showing that a genuine recovery requires persistence across several days rather than one isolated jump. Tuesday's count of 3 puts observable traffic below those earlier levels, but it cannot establish by itself whether the drop is temporary or the start of a renewed deterioration.

The nearest catalyst is diplomacy surrounding the UN General Assembly, whose general debate runs from September 22–26 and concludes on September 28, 2026. A senior Iranian official told Reuters that Tehran could reopen Hormuz within 7 days if the United States eased military pressure and lifted its blockade on Iranian ports. The official said the proposal was delivered through mediators on September 16 and could be discussed in New York, but it remains a conditional offer rather than an implemented agreement. A sustained recovery in observed crossings, regular inbound traffic and rising actual throughput on the East-West Pipeline would confirm that risk is receding. Persistently low counts, renewed attacks or failed mediation would keep the risk premium elevated even if diplomatic headlines produce short-lived market swings.