May 26, 2026

A pivotal five-day stretch from May 20 to May 24 brought the Strait of Hormuz environment closer to a potential turning point, according to maritime intelligence firm Windward. During this period, four developments unfolded concurrently: an administrative escalation by Iran, consistent enforcement by the United States, a modest rebound in exports, and the first public acknowledgment of a diplomatic framework.

Iran Broadens Its Maritime Claim

On May 20, Iran’s Persian Gulf Strait Authority (PGSA) released a boundary for a zone that stretches across the Strait of Hormuz and into the Gulf of Oman, reaching the UAE coastline south of Fujairah. The eastern portion of this zone is particularly notable, as Fujairah serves as the UAE’s primary oil export hub on a route designed to bypass the Strait. By asserting authority over waters near this alternative pathway, Iran is extending its reach beyond the Strait itself to the approaches of the UAE’s key Hormuz-bypass terminal.

Vessels planning to traverse this zone are reportedly required to submit details about the owner, cargo, crew nationalities, and destination, and must secure a transit permit before entry. Reports indicate fees of up to two million U.S. dollars per crossing, payable in Chinese yuan or Bitcoin, though Iran has not published an official fee schedule.

In a joint letter to the International Maritime Organization, the UAE, Saudi Arabia, Bahrain, Kuwait, and Qatar formally rejected the zone, cautioning commercial and merchant vessels against engaging with the PGSA or using the Iran-designated route. The five Gulf states contended that acknowledging Iranian authority over the waterway would set a dangerous precedent.

U.S. Enforcement Operations

On May 20, U.S. Marines boarded the Iranian-flagged tanker CELESTIAL SEA in the Gulf of Oman as part of Operation Epic Fury enforcement, a move confirmed by U.S. Central Command. The vessel is designated under Executive Order 13902 for its role in supporting Iran’s oil export network. This interdiction underscores the U.S. campaign against the Iranian shadow fleet, which operates separately from the broader blockade on Iranian ports.

Kharg Island Sees Partial Recovery

After 13 days of inactivity, Kharg Island resumed partial loading operations. Electro-optical imagery from May 20 captured a 183-meter dark Panamax tanker at the main T-pier loading berth, marking the first crude tanker at that location since the terminal went offline around May 7. Additional loadings were observed on May 22 and May 23, indicating a partial recovery, though the pace remains well below the multi-tanker activity seen in early April.

Fujairah Feels the Impact

Windward detected the operational effects of the PGSA announcement on May 21. Within 24 hours of the boundary publication, AIS detections in the Fujairah area dropped sharply, with a 59% rise in chemical tankers turning off their AIS transmissions. For the week ending May 21, Fujairah’s crude exports totaled 3.84 million barrels, one of the four lowest weekly figures in the past six months, compared to a six-month average of roughly 10 million barrels. The number of VLCCs in the Fujairah area fell from about 23 on May 9 to around 14 on May 21.

Diplomatic Framework Emerges

On May 23, President Trump stated publicly that an agreement with Iran has been largely negotiated and that the Strait of Hormuz will be opened. This announcement now stands as the key variable to monitor, with Windward tracking confirmation of the framework’s terms and any shifts in vessel behavior.

Transit Through the Strait Remains Tight

Commercial traffic through the Strait of Hormuz from May 20 to May 24 stayed heavily restricted, dominated by small vessels operating with AIS either on or off. An increasing number of ships are navigating without AIS due to worsening security and safety conditions. No laden crude tanker trading with Iran has arrived in Asia via the Malacca, Lombok, or Sunda Straits since May 4, severing Iran’s main export route to China.

Floating Storage and Supply Pressures

According to Vortexa data, 39.79 million barrels of Iranian crude are currently held in floating storage across 79 tankers. Roughly two-thirds of tankers involved in Iranian trade are now confined to the Gulf of Oman or the Arabian Gulf. The blockade continues to disrupt Iranian crude flows to Asian markets while trapping tankers within Iranian waters.

Piracy Returns to Somali Basin

Three commercial vessels are currently being held off the Puntland coast of Somalia, the first instance of three simultaneous piracy seizures since the peak years of 2010-2012. Ransom demands range from 3.5 million to 10 million U.S. dollars per vessel, and no crew members have been released. This resurgence follows the near-total withdrawal of dedicated counter-piracy naval patrols from the Somali Basin, as forces were redirected first to the Red Sea Houthi campaign and then to the Strait of Hormuz crisis.

Russian Research Vessel Raises Concerns

Windward identified a Russian-flagged service and research vessel that exhibited a pattern of behavior consistent with maritime espionage and infrastructure mapping in the Caribbean and North Atlantic from February to April 2026. During a 41-day loiter starting March 10, the vessel’s posture aligned with research and survey operations near the MONET telecommunications cable.

Looking Ahead

The May 20-24 period represents the closest the Hormuz environment has come to a turning point since the conflict began, with four parallel pressures: Iranian administrative escalation, sustained U.S. enforcement, a partial export recovery, and the first publicly announced diplomatic framework. The PGSA’s extension to the UAE coast marks the most significant escalation, with observable effects in Fujairah waters showing that Iran’s administrative reach now extends well beyond its territorial jurisdiction. If the framework takes shape, key indicators to watch include the status of the PGSA zone, the U.S. blockade posture, and whether VLCC and Suezmax traffic resumes through Malacca into Asia.