Iran Conflict 2026: US blockades Iranian ports in Strait of Hormuz

USS Dwight D Eisenhower aircraft on patrol over or near the Red Sea. (Janes/Michael Fabey)

The US Central Command (CENTCOM) confirmed US efforts to blockade Iranian ports in the Strait of Hormuz, starting 13 April.

“CENTCOM forces will begin implementing a blockade of all maritime traffic entering and exiting Iranian ports on 13 April 2026 at 1000 am ET, in accordance with the president's proclamation,” CENTCOM said in a 12 April statement.

“The blockade will be enforced impartially against vessels of all nations entering or departing Iranian ports and coastal areas, including all Iranian ports on the Arabian Gulf and Gulf of Oman,” CENTCOM said, adding that it “will not impede freedom of navigation for vessels transiting the Strait of Hormuz to and from non-Iranian ports”.

CENTCOM noted that additional information would be provided to commercial mariners through a formal notice prior to the start of the blockade, adding, “All mariners are advised to monitor Notice to Mariners broadcasts and contact US naval forces on bridge-to-bridge channel 16 when operating in the Gulf of Oman and Strait of Hormuz approaches.”

Defence analysts said the blockade could create problems for Iran but also noted the risks.

“Given Iran's reliance on the strait and the regime's dependence on hydrocarbon revenues, a successful blockade could significantly intensify pressure on Iran's leadership,” Hudson Institute Senior Fellow Can Kasapoğlu noted in an online analysis posted on 13 April by the institute. “The move, however, carries clear escalation risks,” Kasapoğlu said.

“Iran … continues to possess anti-ship missile systems and naval-drone capabilities that threaten US naval assets,” Kasapoğlu said. Defending against these threats could potentially force US planners to expand the American maritime footprint in the region,” he said.