What Is the Offshore Wind Potential in the Gulf of Thailand?

Thailand’s electricity grid depends on natural gas for roughly two-thirds of generation. That dependency leaves the country exposed to fuel price shocks and supply disruptions. Offshore wind in the Gulf of Thailand offers a domestic alternative that could reshape the nation’s energy mix. But with zero megawatts operating today, how realistic is this vision?

The answer depends on who you ask. Engineers point to strong wind resources and shallow waters. Investors point to high costs and missing regulations. See our guide to wind power viability. Policymakers have set ambitious 2037 targets but haven’t yet auctioned a single offshore site. This article examines the data, the plans, and the obstacles.

TL;DR: The Gulf of Thailand holds an estimated 7,000 MW of offshore wind potential (Waewsak et al., Renewable Energy journal). Yet Thailand currently operates zero offshore turbines, while Vietnam has already built over 2,000 MW. Development is stalled by high grid connection costs, regulatory gaps, and a 2027 pilot auction timeline that pushes commercial deployment past 2030.

What Is Offshore Wind in the Gulf of Thailand?

Offshore wind power uses turbines installed in coastal waters to generate electricity. In the Gulf of Thailand, wind speeds at 80–120 meter hub heights reach 5.5 to 6.5 meters per second, delivering capacity factors of 33% to 37% at the best sites (Chancham et al., 2017; Prince of Songkla University). That beats the 20% to 25% typical of Thailand’s onshore wind farms.

The Gulf differs from deeper seas. Water depths stay manageable for fixed-bottom foundations across large areas, which keeps construction costs lower than deep-water projects. Fixed monopile or jacket foundations work well in the 10 to 30 meter depths common across the Gulf, avoiding the expensive floating platforms needed in deeper Andaman waters.

Turbine technology for warm, humid climates like Thailand’s has improved steadily. Modern offshore machines now exceed 10 MW per unit, with rotor diameters wider than a football field. Fewer turbines are needed to reach commercial scale, which reduces maintenance fleets and foundation costs over the project lifetime.

According to Chancham et al. (2017), wind speeds in the Gulf of Thailand reach 5.5–6.5 m/s at hub heights of 80–120 meters, yielding capacity factors of 33–37%. These figures exceed the 20–25% typical of Thailand’s onshore wind farms in the northeast.

Thailand’s current wind fleet is entirely onshore. As of end-2024, total installed wind capacity reached 1,544 MW, with zero net additions during the year (IRENA Renewable Capacity Statistics 2025). Every turbine sits on land, mainly in Chaiyaphum and Nakhon Ratchasima provinces. Offshore wind remains a concept on paper, studied but not yet built.

Why Does Thailand Need Offshore Wind Energy?

Thailand’s electricity grid depends on natural gas for roughly two-thirds of generation, leaving the country exposed to fuel price shocks and supply disruptions. The PDP 2024 plan targets 5,345 MW of cumulative wind additions by 2037, essentially tripling today’s 1,544 MW fleet (Mordor Intelligence, 2024). Offshore wind offers a domestic alternative that solar can’t fully replace.

Thailand imports roughly 20% of its natural gas from Myanmar, and domestic fields in the Gulf are maturing. That import dependency creates a strategic vulnerability. Solar peaks at midday; wind often blows strongest in late afternoon and evening. That’s exactly when Thai demand peaks. The two resources complement each other.

So why look offshore when onshore wind already exists? Meeting those targets with onshore wind alone is difficult. Land constraints, community opposition, and weaker wind resources in available areas limit expansion. Offshore wind power could supply baseload-compatible renewable electricity without consuming scarce land or competing with agriculture.

The geographic distribution also matters. Most of Thailand’s good onshore wind sites sit in the northeast, far from the heavy demand centers around Bangkok and the Eastern Economic Corridor. Offshore wind in the Gulf sits much closer to those load centers, which could reduce transmission losses and grid upgrade costs.

Thailand’s PDP 2024 targets 5,345 MW of wind capacity by 2037, triple the current 1,544 MW (Mordor Intelligence, 2024). Offshore wind in the Gulf could supply roughly 15 TWh annually, diversifying a grid that currently depends on natural gas for two-thirds of generation.

One study estimates the Gulf could generate roughly 15 terawatt-hours annually from 7,000 MW of capacity (Waewsak et al., Renewable Energy journal). That output would cover a meaningful share of national demand and diversify the generation mix away from imported fossil fuels.

How Much Offshore Wind Potential Exists in the Gulf?

Research paints an encouraging picture. A peer-reviewed study by Waewsak and colleagues estimated the Gulf of Thailand could host 7,000 MW of offshore wind capacity, producing about 15 TWh per year (Renewable Energy journal, cited in Offshore Energy Biz). EGAT’s own assessments suggest national offshore potential could reach 13 GW, enough to meet roughly 10% of projected 2037 electricity demand (EGAT study, via EVWind / AEEOLICA, 2023).

Those numbers are theoretical. Actual build-out depends on detailed site surveys, environmental approvals, and transmission grid planning. But even a fraction of that potential would transform Thailand’s wind sector and cut national gas consumption.

Is 7,000 MW actually achievable? The Gulf’s potential sits between the PDP and AEDP targets. That means the resource is large enough to satisfy policy goals, provided developers can access it. A 200 MW offshore pilot project is anticipated for auction in 2027, according to Mordor Intelligence. Meaningful commercial deployment is unlikely before 2030.

To put 7,000 MW in context, Thailand’s total installed power generation capacity is roughly 50,000 MW. Offshore wind could therefore supply roughly 14% of national capacity if fully developed. That is comparable to the share gas-fired plants hold today.

A peer-reviewed study by Waewsak et al. estimates the Gulf of Thailand could host 7,000 MW of offshore wind, producing 15 TWh per year (Renewable Energy journal, via Offshore Energy Biz). EGAT’s broader assessment suggests up to 13 GW of national offshore potential.

What Challenges Block Development?

Cost is the primary barrier. Offshore grid connection runs about THB 25 million per megawatt for subsea cables, compared with THB 8 million per megawatt for onshore grid links (Mordor Intelligence, 2026). Floating foundations, needed in deeper Andaman waters, add roughly USD 1.2 million per megawatt.

Those figures push offshore breakeven costs above THB 5.00 per kilowatt-hour, well above onshore wind’s 2.70 to 6.00 THB/kWh range (BloombergNEF / Mordor Intelligence). Investors need long-term power purchase agreements and clear permitting rules before they’ll commit capital.

Regulatory frameworks are another hurdle. Thailand lacks a dedicated offshore wind licensing regime. Marine spatial planning, environmental impact assessments, and fishing rights must align before any construction starts, a process that can take three to five years.

Twenty-two onshore wind projects totaling 1,490 MW were hit by a Central Administrative Court injunction in March 2024, delaying commercial operation dates into 2025-2026 (Fangda Partners). That legal climate makes investors cautious about all wind projects, including offshore proposals.

What is stopping developers from moving forward? Offshore grid connection costs roughly THB 25 million per MW for subsea cables, versus THB 8 million for onshore links (Mordor Intelligence, 2026). That gap pushes offshore breakeven above THB 5.00 per kWh, well above onshore wind’s 2.70–6.00 THB/kWh range.

Environmental impact assessments add further delay. Offshore wind projects must study effects on marine ecosystems, migratory bird routes, and coastal erosion. Related: grid-scale battery storage. Each study takes months, and conflicting findings can trigger legal challenges that stall projects for years.

Fishing communities in the Gulf also raise legitimate concerns. Turbine foundations and exclusion zones could disrupt traditional fishing grounds. Without early community engagement and clear compensation frameworks, the social license needed for large projects will be hard to secure.

How Does Thailand Compare to Regional Leaders?

The contrast with neighbors is stark. Vietnam already operates 2,084.5 MW across 24 offshore wind farms (Global Energy Monitor, Oct 2025). Its development pipeline swells to 62,963 MW across 54 projects. China leads the world with 138 operating offshore wind farms as of April 2025, accounting for 51% of global offshore turbines (DLR, Dec 2025).

Taiwan also sits at roughly 2,100 MW installed. Thailand’s zero megawatts place it far behind every major East and Southeast Asian peer except perhaps the Philippines. Why has Thailand fallen so far behind? The gap isn’t due to weaker wind resources; the Gulf’s capacity factors rival Vietnam’s sites. The difference is policy execution and investment timing.

Vietnam’s success came from early feed-in tariffs and a streamlined permitting process that attracted international developers. Thailand, by contrast, has focused its renewable energy policy on solar and bioenergy. Wind has received less administrative attention, and the offshore segment has no dedicated licensing pathway at all.

China’s dominance is built on massive state-backed investment and a domestic supply chain that produces turbines at half the cost of European manufacturers. Thailand lacks both the manufacturing base and the state capital to replicate that model. Instead, it will need to rely on foreign investors and imported equipment.

Vietnam operates 2,084.5 MW of offshore wind across 24 farms, while Thailand has zero (Global Energy Monitor, Oct 2025). China’s 138 offshore wind farms account for 51% of global capacity, highlighting how far Thailand lags behind regional peers.

Frequently Asked Questions

How much offshore wind capacity could the Gulf of Thailand support?

Studies estimate the Gulf could support 7,000 MW of fixed-bottom offshore wind, generating roughly 15 TWh annually (Waewsak et al., Renewable Energy journal). EGAT’s broader national assessment suggests up to 13 GW is possible if deeper waters and the Andaman Sea are included.

When will Thailand build its first offshore wind farm?

A 200 MW pilot auction is anticipated in 2027. Commercial-scale projects are unlikely before 2030 due to regulatory preparation, environmental reviews, and grid infrastructure lead times (Mordor Intelligence, 2026). Developers will need clear offtake contracts before committing capital.

Why is Vietnam ahead of Thailand in offshore wind?

Vietnam moved earlier with feed-in tariffs and simpler permitting. It now has 2,084 MW operating and a 62,963 MW pipeline (Global Energy Monitor, Oct 2025). Thailand is still designing its offshore policy framework, which delays investor confidence.

What is the main technical barrier for offshore wind in Thailand?

Grid connection cost is the biggest hurdle. Subsea cables run about THB 25 million per MW, versus THB 8 million for onshore links (Mordor Intelligence, 2026). That gap, plus the lack of offshore-specific regulations, keeps most developers on the sidelines.

Could floating wind work in the Andaman Sea?

Possibly, but it is more expensive. The Andaman Sea has deeper waters that require floating foundations, which add roughly USD 1.2 million per MW (Mordor Intelligence, 2026). Thailand’s immediate focus is on fixed-bottom turbines in the shallower Gulf, where costs are lower and technology risk is smaller.

Conclusion

Thailand’s Gulf holds enough wind energy potential to meet a significant slice of future electricity demand. The resource is proven, the technology is mature, and regional peers have already shown the path. But high grid costs, missing regulations, and a cautious investor climate mean the first turbine is still years away.

Will the Gulf’s 7,000 MW potential remain a dream, or can policy turn it into reality? For now, it remains untapped. The 2027 pilot auction will be the first real test. If the government moves quickly on licensing, grid planning, and community engagement, the Gulf of Thailand could become a major renewable energy hub by the mid-2030s. If not, Vietnam and China will continue to pull further ahead while Thailand’s gas import bill keeps growing.