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Iran Conflict 2026
22OCT

Saudi Red Sea bypass fell 41% before blockade

2 min read
17:22UTC

Wood Mackenzie data published 24 July showed Saudi Red Sea crude bypass fell 41% from a March peak by June, a de-escalation the 23 July blockade wiped out within a week.

ConflictDeveloping
Key takeaway

June's easing in Saudi Red Sea bypass reversed in a week, so freight must price a snapback, not a trend.

Wood Mackenzie data published on 24 July shows Saudi Red Sea crude bypass peaked at 4.07 million barrels a day in March and fell 41% to 2.39 million by June⁠1. Bypass here means Saudi crude routed away from the Red Sea approach to avoid the Houthi threat, so a falling number reads as de-escalation and returning confidence in the corridor.

The timing undercut the reading. Wood Mackenzie is an energy research firm whose flow data desks treat as a considered read on trend, yet the series it released describes a market that had already reversed. The Bab el-Mandeb blockade of 23 July snapped the bypass back toward full within a week, so a desk taking the 24 July print at face value would have inferred a cooling trend one day after the flow turned.

Read the two series together and June's normalisation shows its condition: it held only while the strait stayed open. The March-to-June decline unwound inside a week, which means a Red Sea freight position cannot be sized as though the calm were a fading trend. It has to carry a snapback premium for any single security shock, because the last one erased four months of easing in seven days.

Deep Analysis

In plain English

A research firm called Wood Mackenzie tracks how much Saudi oil avoids the Red Sea by using satellite data on ship movements, but building that picture takes several weeks. Its report published on 24 July said Saudi oil avoiding the Red Sea had fallen 41% by June, suggesting tensions were easing. But a new blockade declared the day before, on 23 July, had already reversed that trend. So the report described a calm that was already over by the time readers saw it, a reminder that even good data can lag fast-moving events.

Deep Analysis
Root Causes

Vessel-tracking analytics firms validate AIS position data against port-call records and cargo manifests before publishing route-flow estimates, a process that takes weeks rather than days; this lag is structural to how the data is compiled, not a one-off delay specific to this release.

During a period of rapid re-routing, that lag means the most-cited market benchmark for Red Sea bypass volume is systematically describing conditions that have already changed, leaving desks without a real-time equivalent until the next monthly cycle.

What could happen next?
  • Risk

    Analysts trading on the most recent published route-flow data risk anchoring to conditions that have already reversed by several weeks.

First Reported In

Update #20 · Saudi crude reroutes to Suez, freight bites

World Pipelines (citing Wood Mackenzie)· 27 Jul 2026
Read original →
Causes and effects
This Event
Saudi Red Sea bypass fell 41% before blockade
A desk reading only the 24 July release would infer a cooling trend, yet the flow snapped back to full bypass the day after the data went out, so any Red Sea freight position has to price a one-week reversal.
Different Perspectives
Wang Yi
Wang Yi
China's foreign minister and Djibouti's issued a joint communique on 21 October saying the war should not reach the Horn of Africa and stressing free navigation through Bab al-Mandeb. The text names neither Iran nor the Houthis, and Djibouti hosts China's only overseas military base, opposite the Yemeni coast.
Ministry of External Affairs
Ministry of External Affairs
India's foreign ministry called the attacks on Saudi civilian and energy sites "unacceptable" on 22 October and said they must stop at once. An Indian died at Dammam, Indians were injured there and at Shaybah, and about 4,000 Umrah pilgrims remain stranded by one MP's count.
Iraq
Iraq
Iraq closed the al-Sheeb crossing with Iran to travellers and trucks from 21 October and said other crossings would close gradually. Unlike September's closure, which ended on a staged timetable, this one has none, and Iran's interior ministry said it received no notice.
Abdel Fattah el-Sisi
Abdel Fattah el-Sisi
Egypt's president said on 21 October that Cairo's support would "defend Saudi territory, and does not include an attack on Yemen". Araghchi warned that Egyptian involvement would further complicate the situation, and Cairo's limit matches the one Ankara set on 8 October against attacking another state's soil.
UK Ministry of Defence
UK Ministry of Defence
The MoD said on 20 October that RAF Typhoons over Saudi Arabia will not strike the Houthis, but extended tanker support to Saudi operations including against Houthi targets in Yemen. The tanker line sets no limit on strikes, so British aircraft may now refuel Saudi jets on bombing runs.
Turkey
Turkey
Ankara sent the Mecca Joint Defence Agreement to parliament around 20 October, and its published text treats an attack on one party as an attack on all. Article 16 brings it into force only on the last ratification, so the 5 October invocation in Riyadh could not yet bind Turkey.

Written with AI from Lowdown's published reporting. Not individually reviewed by an editor. Editorial standards.