Saudi Arabia’s most important defense against a Strait of Hormuz disruption has become a new point of leverage for Yemen’s Houthis. The group announced an immediate maritime embargo against Riyadh on Monday, AP News reported, extending a renewed confrontation from airports and airspace into the shipping lanes that now carry an unusually large share of Saudi oil.
Houthi military spokesperson Yahya Saree described the measure as an “eye for an eye” response to restrictions and attacks attributed to Riyadh.
The declaration did not identify targeted vessels, explain how Saudi affiliation would be determined, or disclose an enforcement area. No resulting attack or interruption had been independently confirmed as of publication.
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That uncertainty is commercially significant because Saudi Arabia has spent months redirecting crude from its Persian Gulf terminals to Yanbu on the Red Sea. The shift allowed Saudi Aramco to keep serving customers while tanker movements through the Strait of Hormuz were constrained.
Reuters reported on July 15 that more than 70% of the kingdom’s normal crude exports had been diverted to Yanbu. Shipments from the port averaged about 4 million barrels per day in recent weeks, compared with approximately 973,000 barrels per day during the corresponding 2025 period, according to Kpler and Signal Ocean data.
Daily loadings reached roughly 4.7 million barrels around July 13, up from 3.36 million around July 10. Those volumes placed Yanbu close to its practical loading limits just before the Houthi announcement.
Aramco’s East-West Pipeline carries crude from fields and processing infrastructure in Saudi Arabia’s Eastern Province to the west coast. The company said the system reached its maximum capacity of 7 million barrels per day during the first quarter.
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That figure does not mean Yanbu can export 7 million barrels of crude every day. Some pipeline throughput supplies west-coast refineries and storage, while available berths, tanks, vessel scheduling, and downstream logistics constrain export loadings.
Yanbu cargoes bound for Europe can sail north toward Egypt and the Suez system without crossing Bab el-Mandeb. Asian deliveries generally move south, passing the narrow strait between Yemen and the Horn of Africa.
South Korea said 13 tankers carrying Saudi Arab Light crude had safely completed the Red Sea route since the latest regional war began, with the most recent vessel leaving Bab el-Mandeb on July 12. South Korean refiners were planning to lift at least 6 million barrels per month from Yanbu even if Persian Gulf shipping normalized, according to S&P Global Commodity Insights.
Japan’s refiners were also considering monthly purchases of between 2 million and 5 million barrels of Arab Light through the Red Sea route.
Total petroleum movements through Bab el-Mandeb reached 7.4 million barrels per day in June, equal to about 7% of global oil production, Reuters reported using Kpler data. That was up from 4.2 million barrels per day one year earlier.
The Houthis have demonstrated the ability to make a maritime threat commercially consequential without physically sealing a strait. Their earlier campaign involved attacks on more than 100 vessels, according to AP, prompting major shipping companies to divert vessels around Africa.
The immediate test is therefore not whether the group can impose a conventional naval blockade. It is whether shipowners, crews, charterers, and insurers consider Saudi-linked voyages sufficiently dangerous to delay sailings, demand higher compensation, or withdraw coverage.
