Yemen Conflict Update: Houthi Coastal Offensive Reshapes the Red Sea Military Balance

September 2026

Executive Summary

The latest Houthi offensive in western Yemen has significantly altered the military balance along the Red Sea coast.

Houthi forces have seized Mocha, Zuqar, Mayyun/Perim and the Hanish Islands, while government forces have withdrawn from several positions after sustaining heavy losses. Saudi Arabia has responded with an intensified air campaign, including more than 300 strikes against targets in Taiz, Hodeidah and other Red Sea coastal areas. Yemeni government counterattacks around Dhubab and Khokha have so far failed to halt the advance.

The territorial gains give the Houthis a much stronger military position along Yemen’s Red Sea coastline and around the approaches to Bab al-Mandab.

ASA assesses that the most immediate issue is now whether the Houthis can consolidate and fortify these gains before Saudi-backed forces are able to reorganise.

A rapid reversal appears unlikely without a significant ground counteroffensive. Continued Saudi airstrikes may slow Houthi consolidation, but air power alone is unlikely to restore lost coastal positions.

Military Situation

The Houthi advance has been rapid and geographically significant.

The seizure of Mocha and Dhubab strengthens Houthi control of the mainland coastline, while Mayyun/Perim and the Hanish Islands extend their military position into the Red Sea itself.

Government forces have attempted counterattacks, but these have not changed the direction of the offensive. Claims of heavy Houthi losses remain contested.

Saudi Arabia’s intensified air campaign indicates that Riyadh views the Houthi advance as a significant strategic threat.

The immediate military contest is likely to focus on preventing the Houthis from fortifying newly captured coastal and island positions.

Strategic Significance

The Houthi gains strengthen the group in three important ways.

First, they create greater territorial continuity along Yemen’s western coastline.

Second, control of Mayyun/Perim and the Hanish Islands improves the group’s ability to monitor and potentially threaten activity in the Red Sea.

Third, the gains increase Houthi leverage over Saudi Arabia and other regional actors by placing additional pressure on maritime and coastal security.

This does not mean the Houthis exercise uncontested control over the Bab al-Mandab Strait itself.

However, their new positions substantially improve their ability to influence the security environment around the waterway.

Humanitarian Impact

The fighting is also producing a growing humanitarian impact.

More than 80,000 people have reportedly been displaced during two weeks of fighting, with thousands fleeing toward Djibouti.

Further fighting along the coast would likely generate additional displacement and increase pressure on communities and neighbouring states across the Red Sea.

Outlook

Houthi Consolidation — Most Likely

The Houthis fortify newly captured coastal and island positions while maintaining pressure on Saudi and government forces.

Saudi airstrikes continue, but no immediate large-scale ground counteroffensive succeeds in reversing the territorial gains.

Likelihood: HIGH

Saudi-backed Counteroffensive

Government and Saudi-backed forces regroup in Lahj and Taiz and attempt to recover Mocha and Dhubab.

Such an operation would likely involve prolonged fighting and significant reliance on Saudi air power.

Likelihood: MODERATE

Wider International Involvement

If Houthi activity begins to cause greater disruption to international shipping, foreign naval forces may increase their presence or establish stronger maritime protection measures.

Likelihood: MODERATE

ASA Assessment

The latest Houthi offensive represents a major shift in the military geography of western Yemen.

The most important near-term development will be whether the group can consolidate its newly captured positions before Saudi-backed forces mount an effective counteroffensive.

If the Houthis succeed, their control of key coastal areas and Red Sea islands will become increasingly difficult and costly to reverse.

The conflict is therefore entering a new phase in which control of Yemen’s western coastline is likely to remain a central military objective.

The risk of wider regional escalation will increase if Saudi operations intensify or if Houthi forces use their new positions to expand pressure on maritime traffic.

Current Risk Level: HIGH
Trajectory: DETERIORATING