US Naval Blockade of Iranian Ports: Strait of Hormuz Status as of April 15, 2026

On April 13, 2026 at 14:00 UTC (10:00 a.m. ET), the United States Navy began enforcing a full military blockade of all Iranian ports and coastal areas, including facilities on the Arabian Gulf and the Gulf of Oman. The decision followed the collapse of the Islamabad Talks between US and Iranian negotiators, mediated by Pakistan, which ended without an agreement on April 12. President Donald Trump announced the operation on Truth Social, instructing the Navy to stop any vessel attempting to enter or leave Iranian ports.

US Central Command (CENTCOM) deployed more than 10,000 personnel, over a dozen warships, and dozens of aircraft to enforce the operation. Naval assets include the aircraft carrier USS Abraham Lincoln, the amphibious group USS Tripoli, eleven destroyers, and the carrier strike group of the USS Gerald R. Ford operating from the Mediterranean. Boeing P-8 Poseidon patrol aircraft are also being used to track and intercept tankers. US forces are not loitering inside the Strait itself but are intercepting merchant traffic in the Gulf of Oman after vessels exit Iranian facilities.

Enforcement update (April 14–15). Late on April 14, CENTCOM Commander Admiral Brad Cooper declared the blockade "fully implemented," stating that in less than 36 hours since the blockade was implemented, US forces had completely halted economic trade going into and out of Iran by sea. A US Navy destroyer intercepted two oil tankers departing Chabahar Port on the Gulf of Oman on April 14, contacting them via radio and ordering them to reverse course. A US official stated that a total of 8 oil tankers entering or leaving Iranian ports had been intercepted since the start of the blockade, with all tankers complying with directions to reverse course and no boarding required. Kpler ship-tracking data reviewed by CNN identified the Chinese-owned, US-sanctioned Rich Starry and the sanctioned Elpis as among the vessels that crossed the Strait on April 13 and then reversed course or switched off their transponders in the Gulf of Oman. A third vessel, the Ostria, turned back from the Strait before loading. In total, Kpler recorded five laden product tankers holding stationary in the Gulf of Oman around the blockade's start. At least four Iran-linked ships nonetheless crossed the Strait on April 14 per BBC Verify AIS data, and Iran continues to report its own vessel movements through the corridor.

Non-Iranian traffic. CENTCOM has maintained that freedom of navigation continues for vessels transiting between non-Iranian ports. MarineTraffic recorded 31 vessels passing through the Strait in the 24 hours preceding implementation. As of 11:32 UTC on April 14, eleven vessels were inside the waterway, three flying the Iranian flag, six classified as oil or chemical tankers, three as cargo ships, with most recorded in ballast or with unknown load conditions, suggesting commercial confidence remains low.

Mine clearance. US forces began mine-clearing operations on April 11, when the destroyers USS Frank E. Peterson and USS Michael Murphy transited the Strait. Admiral Cooper announced work had started on "establishing a new passage" to be shared with the maritime industry. Underwater drones, littoral combat ships (USS Santa Barbara, USS Canberra) equipped with mine countermeasure packages, and MH-60S helicopters are supporting the effort. Iran is estimated to hold 2,000 to 6,000 naval mines, and US officials report Tehran has lost track of the locations of mines it deployed. No safe corridor has been formally announced to commercial operators as of April 15.

Iranian response escalates (April 15). Iran's armed forces threatened to block shipping from the Persian Gulf, the Sea of Oman and the Red Sea if the US continues its blockade and "creates insecurity for Iranian commercial ships and oil tankers". This marks a significant widening of Tehran's threat perimeter to include the Red Sea. Iranian media had earlier reported that the IRGC launched a drone toward US destroyers crossing the Strait on April 11, with no reported impact. Throughout the broader conflict, the IRGC has carried out 21 confirmed attacks on merchant ships, including strikes on the Stena Imperative in Bahrain, the Sonangol Namibe near Kuwait, the Mayuree Naree, and a laden VLCC near Dubai. Tehran considers the blockade a violation of the ceasefire, and the two-week truce agreed on April 8 remains fragile.

Diplomatic track reopening. Despite the escalation, both sides are signaling renewed dialogue. A senior US official told Fox News on Tuesday that the US and Iran have "all the ingredients of a deal", and in-person talks between the US and Iran could resume as early as this week, according to two people familiar with the negotiations. Trump stated on April 15 that the Iran war is "close to over" and claimed China is "very happy" the US is working to open the Strait and has agreed not to send weapons to Iran. The US has proposed a 15-point plan reportedly including Iran committing to no nuclear weapons, handing over its highly enriched uranium, limits on Tehran's defense capabilities, and the reopening of the Strait of Hormuz, while Iran has tabled its own 10-point proposal. IAEA Director General Rafael Grossi said strict international checks on Iran's nuclear program must form the basis of any future agreement. France and the United Kingdom will still host an online conference on April 17 to coordinate a defensive multilateral mission, though UK PM Keir Starmer reiterated on April 15 that Britain will not be drawn into the war.

Market reaction. Brent crude for June delivery was trading around $94.47 per barrel and US WTI for May delivery near $90.40 on April 14, with futures actually easing slightly on diplomatic-resolution signals. The IMF cut its 2026 global growth forecast to 3.1 percent (from 3.3 percent in January) and warned of an adverse scenario with oil sustained near $100. The IMF, IEA and World Bank issued a joint statement warning that fuel and fertilizer prices may remain elevated even after the Strait reopens. A UNDP report warned that more than 32 million people worldwide could be plunged into poverty by the economic fallout. The blockade is estimated to cost Iran approximately $435 million per day, with annual seaborne trade of $109.7 billion almost entirely routed through the Strait. China condemned the blockade as a "dangerous and irresponsible act". Russia warned of negative consequences for international markets, while Lavrov reaffirmed Tehran's "inalienable" right to peaceful enrichment.