The U.S.-led blockade of Iranian ports will remain in effect until a peace agreement with Iran is formally signed Friday, according to a warning issued by the U.K. Maritime Trade Operations.
UKMTO circulated a memo advising commercial vessels not to attempt to enter or leave Iranian ports until further notice, warning that military enforcement operations remain active across several strategic waterways.
“Blockade of Iran ports remains in effect pending execution of a US-Iran ceasefire agreement scheduled for 19 June, 2026,” the memo reads.
The agreement is expected to formally end months of hostilities between the United States and Iran, which escalated after American military strikes targeted key Iranian infrastructure and a naval blockade was imposed on the regime’s ports.
While negotiators have announced that a peace agreement is set to be signed on June 19, restrictions on Iranian maritime traffic remain in place until the deal is officially executed.
The UKMTO warning instructed mariners to avoid the region until military authorities provide further guidance.
“Do not attempt to cross until explicit direction is given. A restricted Area Exists Due to Military Blockade Operations in the Arabian Gulf, Gulf of Oman, North Arabian Sea, and the Strait of Hormuz A military blockade of Iranian ports remains in effect restricting all traffic inbound and outbound from these ports,” the memo added.
The advisory also warned that vessels ignoring instructions from blockading forces could face immediate consequences.
“Vessels subject to blockade enforcement should continue compliance with direction from blockading forces. Failure to immediately comply may result in rapid escalation to disabling or destructive fire. Masters are advised to take special caution not to endanger their crews during blockade enforcement actions by failing to abide by instructions specifically given to ensure their safety and security.”
The peace agreement is expected to include provisions aimed at halting military operations and reopening shipping routes once both sides complete the formal signing process.
Until then, the blockade remains in force, and one of the world’s most important energy corridors, including the Strait of Hormuz, will continue operating under heightened military oversight.
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