Is the Strait of Hormuz Closed? Live Status — May 2026
Short answer (updated {{LAST_REVIEWED}}): No, the Strait of Hormuz is not formally closed. It remains open to commercial transit under UNCLOS Article 38 (right of transit passage), but traffic is constrained, slower and more dangerous than in any month since 2019. Several VLCC operators have paused new fixtures, war-risk premiums have jumped from 0.07 % to 0.31 %, and at least six tankers have switched off their AIS transponders to cross.
This page is updated multiple times per day from UKMTO advisories, ESA Copernicus Sentinel-1 SAR imagery, Kpler vessel data and primary IRGC / US Navy statements. For the interactive map, see the live dashboard.
Hormuz traffic status — at a glance
| Indicator | Status | Trend (7 d) |
|---|---|---|
| Strait formally closed by Iran? | No | — |
| Commercial transit possible? | Yes, with delays | ↘ throughput −18 % |
| VLCC daily transits (normal ≈ 25) | ~17–20 / day | ↘ |
| AIS-dark crossings detected (Sentinel-1) | 6+ in 72 h | ↗ |
| War-risk insurance premium (% of hull) | 0.25–0.31 % | ↗↗ |
| UKMTO threat level | Severe | ↗ |
| Brent spot, $/bbl | mid-$90s | ↗ |
Is Hormuz safe right now?
"Hormuz safe" is currently one of the fastest-rising Google queries worldwide (+350 % week-over-week, France & GCC). The honest answer for crews, charterers and insurers is: transit is technically possible, but the risk premium has tripled and the legal grey zone is wider than at any point since the 2019 Kokuka Courageous incident.
Three things have changed in May 2026:
- The IRGC boarded the MV Sea Sentinel III, a UK-flagged floating armoury, on 13 May. This removed an entire layer of armed self-defence from tankers operating in the eastern approaches.
- A live-fire exchange occurred between IRGC fast boats and the USS Stockdale near Larak Island on 14–15 May — the first confirmed exchange of fire between US Navy and IRGC since 2016.
- Two product tankers were attacked within 36 hours (JV Innovation, Agios Fanourios I), with limpet-mine signatures consistent with the 2019 Gulf of Oman pattern.
Could Iran legally close the Strait of Hormuz?
No. Hormuz is an international strait under UNCLOS Part III. Iran has signed but not ratified UNCLOS, yet customary international law still binds it to the right of transit passage for foreign vessels. Closure would constitute an act of war under the 1958 Convention on the Territorial Sea and, in US doctrine, would trigger an Article 5–style response from CENTCOM.
What Iran can — and does — do is:
- Harass tankers via IRGC fast-boat swarms and limpet-mine operations
- Seize vessels under sanctions-evasion or smuggling pretexts
- Lay mines (last done in 1987–88, "Tanker War")
- Threaten missile saturation of the chokepoint (Khalij Fars, Hoot, Nasr-1)
These tactics close the strait economically without ever firing the legal trigger.
How the world monitors Hormuz in real time
Searches for "hormuz strait monitor" are up +130 % this week. The operational stack that journalists, traders and shipowners actually use:
- UKMTO (UK Maritime Trade Operations) — official British advisories, ~30 min latency
- ESA Copernicus Sentinel-1 — SAR imagery, detects dark vessels every 6 days
- Planet Labs SkySat — daily 0.5 m optical imagery, tasked on incidents
- Kpler / Vortexa / LSEG — paid AIS + cargo analytics
- MarineTraffic / VesselFinder — free AIS feeds (with a 15-min delay)
- Hormuz Crisis Tracker (this site) — open-data dashboard combining the above into one live map; see the interactive timeline.
Oil-supply impact (if you only read one paragraph)
About 20 million barrels per day of crude and condensate transit Hormuz — roughly one-fifth of global oil consumption. There are realistically only ~3 mb/d of bypass capacity (Saudi Petroline, UAE ADCOP, Iran's Goreh-Jask), so even a partial shutdown is structurally untreatable in the short term. The full mechanics are in our oil disruption tracker and the alternative shipping routes analysis.
What to do as a stakeholder
- Shipowners: re-check war-risk cover before each fixture; AIS shutdown decisions must be documented to satisfy P&I clubs.
- Charterers: model a $/voyage delta with a 0.31 % premium (see the war-risk insurance breakdown).
- Airlines & refiners: stress-test against the bull scenario in our Brent forecast.
- Macro/ESG: track Sentinel-1 SAR slick detections; the environmental tail risk is mapped in the dashboard ecosystems panel.
FAQ
Is the Strait of Hormuz currently closed? No. As of {{LAST_REVIEWED}} the strait remains open to commercial traffic, but transit volumes are down roughly 18 % week-on-week and war-risk insurance premiums have tripled.
Can Iran legally close the Strait of Hormuz? No. Hormuz is an international strait under UNCLOS Part III, with a customary right of transit passage. A unilateral closure by Iran would constitute an act of war under international law.
Is it safe for a tanker to cross Hormuz right now? Transit is physically possible but the risk profile is the highest since 2019. Several VLCC operators have paused new fixtures and at least six vessels have crossed with AIS transponders switched off in the last 72 hours.
How much oil passes through the Strait of Hormuz? Approximately 20 million barrels per day of crude and condensate, equal to about one-fifth of global oil consumption. Only ~3 mb/d of bypass capacity exists via Saudi Petroline, UAE ADCOP and Iran's Goreh-Jask pipeline.
Where can I monitor the Strait of Hormuz live? The Hormuz Crisis Tracker dashboard aggregates UKMTO advisories, Copernicus Sentinel-1 SAR detections and Kpler vessel data in one map. UKMTO's own advisory feed is the official source.
What was the last time the Strait of Hormuz was actually closed? It has never been formally closed. The closest historical episode is the 1987–88 "Tanker War", when mines and missile attacks reduced — but did not stop — commercial transit.