4 hours ago
10
More than a dozen empty Iranian oil tankers are floating off the southern coast of Sri Lanka with nowhere to go. The US naval blockade of Iranian ports, reimposed on July 14, has effectively severed the country’s crude export lifeline, and the tankers anchored near Galle are the most visible proof.
Since mid-July, not a single tanker bound for destinations beyond the Persian Gulf has loaded crude at Kharg Island, Iran’s primary oil export terminal.
The blockade by the numbers
US Central Command reported that by August 24, its forces had redirected 71 commercial vessels attempting to breach the blockade. Three ships were disabled. Two were boarded.
The blockade still permits humanitarian traffic, a distinction the US has been careful to maintain for legal and diplomatic purposes.
Ship-tracking organizations United Against Nuclear Iran (UANI) and TankerTrackers have confirmed the scale of the disruption. Approximately 13 empty Iranian-flagged tankers, including vessels belonging to the state-owned National Iranian Tanker Company (NITC), currently sit in Sri Lanka’s exclusive economic zone. Some estimates put the total number of Iranian tankers staying away from home ports as high as 20, with additional vessels anchored off Malaysia.
Before the blockade took full effect, these same tankers were busy with ship-to-ship transfers of Iranian crude, a long-established technique for evading sanctions. The oil would move from Iranian vessels to intermediary tankers, often in Malaysian waters, before heading to Chinese refineries.
From ceasefire to “economic D-Day”
The current blockade has roots stretching back to April 13, when the US first imposed it amid escalating military tensions between the US, Iran, and Israel. A brief ceasefire allowed it to lapse, but the reimposition on July 14 came with sharper teeth.
US Treasury Secretary Scott Bessent described the expanded sanctions accompanying the blockade as “economic D-Day,” framing the campaign as a new phase of maximum pressure on Tehran’s finances.
The broader conflict driving these measures escalated in late February 2026, involving military strikes, tensions in the Strait of Hormuz, and Iranian attacks on commercial shipping.
Dozens of Iran-linked tankers continue to attempt ship-to-ship transfers in Malaysian waters, according to tracking data. But with empty vessels now routing to Sri Lanka instead of returning to Iranian ports for fresh cargo, the supply chain is breaking down.
What this means for oil markets
Kpler data confirms that Iranian crude loadings have essentially zeroed out since mid-July, coinciding with a period when seasonal demand typically rises.
Disclosure: This article was edited by Editorial Team. For more information on how we create and review content, see our Editorial Policy.
English (US) ·