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Iran Conflict 2026
3JUN

Saudi Red Sea bypass fell 41% before blockade

2 min read
09:04UTC

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
International Energy Agency
International Energy Agency
G7 members agreed on 2 October to release up to 100 million barrels through the IEA over four months, front-loading diesel.
China
China
China signed the 15 October text reaffirming the Resolution 2216 arms embargo on the Houthis. The Wall Street Journal reported that Conflict Armament Research found Chinese parts in a Houthi copy of Iran's Kheibarshekan missile.
Russia
Russia
Russia joined the 15 October consensus condemning the Houthis, a month after vetoing a mandate for a UN panel of experts on Iran sanctions on 17 September. One Western official told Bloomberg that Moscow is providing Iran with missiles, and the White House rejected the assessment.
India
India
National Security Adviser Ajit Doval raised seafarer safety with Mohsen Rezaei on 12 October, after a drone hit the Petro Dolphin with 11 Indians aboard at Sohar. External Affairs Minister S. Jaishankar urged that attacks on commercial shipping and seafarers be avoided.
Lebanon
Lebanon
President Joseph Aoun met UN peacekeeping chief Jean-Pierre Lacroix in Beirut on 14 October as UNIFIL winds down before its mandate ends on 31 December. Two days later Qatar's prime minister pledged in Beirut to fund a solar plant for Lebanon.
Kataib Hezbollah
Kataib Hezbollah
The militia announced a halt to operations except against "hostile aircraft" and denied any disarmament deal with Prime Minister Ali al-Zaidi. A day later Quds Force chief Esmail Qaani urged eliminating "remaining traces of the US presence in other arenas".

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