Strait of Hormuz Blockade Slashes Thailand’s GDP Forecast Despite No Iranian Oil Imports

Traffic through the Strait of Hormuz, a critical global shipping route, fell over 90% in March and April 2026. Iranian attacks and a U.S. naval blockade caused this severe disruption. This strait typically handles approximately one-fifth of the world's oil and liquefied natural gas (LNG) flows.

Thailand, an economy heavily reliant on imported energy, faces direct consequences from such global events. While the nation does not import oil from Iran, it remains vulnerable to the broader impacts on global oil prices and shipping costs. Its net energy imports account for 5% to 6% of its Gross Domestic Product (GDP), a measure of economic output.

This disruption prompted the National Economic and Social Development Council (NESDC) to revise Thailand's 2026 GDP growth forecast. The projection now stands at 1.3%, a decrease from an earlier forecast of approximately 2%. The reduced growth expectation reflects the macroeconomic impact of increased energy costs and freight premiums.

The global interconnectedness of energy markets means that regional conflicts can trigger worldwide economic effects. For Thailand, the strategic risk centers on repricing and increased shipping expenses, rather than a direct shortage of Iranian crude. The nation's economy faces substantial pressure from these increases.

Observers will watch how sustained geopolitical tensions and their effects on critical shipping lanes continue to influence economic forecasts for import-dependent nations globally.