How a breakthrough off the coast of Shanghai signals a fundamental restructuring of the global data center industry?
Modern data centers are some of the most resource intensive buildings ever created by mankind. They require 24/7 power, copious amounts of cooling water, large amounts of land, and access to high-capacity fiber networks. With the explosion of generative AI, cloud computing, and edge processing creating rapidly increasing demand for power, water, land and connectivity, the current status-quo for the data center industry is unsustainable.
Total global electricity consumption for data centers in 2023 was around 415-460 TWh, approximately 1.5-2% of global electricity demand, according to the International Energy Agency. With a scenario where AI adoption continues at a fast pace, that figure will exceed 945 TWh in 2030, around the size of Japan's total electricity consumption today.
Each day a standard hyperscale data center consumes 3-5 million gallons of freshwater for cooling, comparable to a small to medium sized city. Google's data centers consumed over 5.6 billion gallons in 2022, up 20% from 2021, and Microsoft consumed 1.7 billion gallons in the same period, up 34% on the previous year. More than a quarter of the world's current data center capacity is located in regions designated 'high' or 'extremely high' for water stress, according to World Resources Institute's Aqueduct tool.
Land scarcity only adds another dimension to the industry's troubles. In just the last decade, prices in the Ashburn, Virginia corridor;the world's largest cluster of data centers. increased by more than 300%. The moratorium placed by Singapore in 2019-2022 was on grounds of grid capacity and land constraints. 10-20 acres are needed for a 100 MW facility when the support infrastructure, setbacks and the structure itself are included, compared with less than 90% reduction of the surface footprint of an underwater facility.
Experts at Cervicorn Consulting evaluated the industry and according to them, if data center energy demand reaches 945 TWh globally by 2030 and AI workload growth continues at its projected rates, the industry may need to look beyond just what data centers are built with and begin to consider what they are built into. Offshore wind and ocean energy powering submersible facilities may need to transition from prototypes to practical infrastructure over the next decade. With AI workloads expected to grow exponentially, the utilities, investors, cloud companies, and governments around the world need to find ways to invest in infrastructure that satisfies both speed and sustainability. Underwater data centers may prove to be one of the leading strategies for realizing this goal.
Comparison Between Conventional Data Centers & Underwater Data Centers
| Dimension | Conventional DC | Hyperscale DC | Underwater DC |
| Freshwater (per MW/yr) | 7–12M gallons | 2–4M gallons | Zero |
| Land footprint (per MW) | 0.5–1.5 acres | 0.3–0.8 acres | <0.05 acres |
| Cooling % of total power | 30–40% | 15–20% | 8–12% |
| Server failure rate (relative) | 1.0× | 0.7× | 0.125× (Natick) |
| Deployment lead time | 18–36 months | 18–36 months | 6–12 months |
An underwater data center (UDC) is a modular system, engineered to accommodate marine mechanics, thermal design, module servers and power delivery into the environment of the seabed. UDC modules are protected by a pressure vessel of marine grade steel or high tensile composites that are designed as a cylindrical or a rectangle that must accommodate the surrounding hydrostatic pressure at its depth-at operational depth of 10-40 atmospheres, the surrounding pressure would be around 100-400 meters-as well as the biofouling from its surroundings, the materials also provide some electromagnetic shielding.
The inside of the module is filled with nitrogen gas, and maintained slightly above atmospheric pressure, an inert gas that reduces the rate of internal metallic oxidation and convective heat transfer within the internal casing. The power required by the module is supplied via the seabed via submarine cable, or an on-land connection that then runs to a source of power generation offshore, most notably wind turbine farms. Data is transmitted through submarine optical fiber that connects over 1.3 million kilometers of fiber around the globe carrying over 95% of intercontinental internet data.
In late May of 2026, the first wind-powered underwater data center was officially launched off the coast of Shanghai in China's Lin-gang Special Area. While this facility was designed by a subsidiary of China Communications Construction Company (CCCC) it is unique in its timeline. The project went from completion of phase one construction in October 2025 to fully commissioned in about seven months; an impossible timeline for constructing a conventional data center of similar specification.
The data center is currently operating at 2.3 MW and will be designed for a total 24 MW (192 server racks on 4 levels). The data center utilizes a closed loop system utilizing copper-pipes circulating sea-water as the heat exchanger thus decreasing electricity consumed in cooling by 22.8% and deriving almost all 95% of its power requirement from offshore wind turbines. No fresh water is used by this data center.
“The ratio of 24MW intended capacity to the current 2.3 MW operating capacity is a reflection of a phased hardware installation strategy, identical to how any hyperscale operator manages capital expenditure based on uncertain demand projections. Thus the data center is future-proofed and will likely see further computer hardware added to it when AI inference necessitates it.”
Challenges remain in how to sustainably manage server heat dumping into the local environment. A 2023 peer-reviewed paper published in Energy Reports analyzed dispersal of heat plumes from a 10MW submarine data center at a depth of 30m, showing sustained increases in temperature ranging between 0.5 C and 2.2 C at radii between 150m-250m, which includes zones where both benthic invertebrate communities and some coral populations face thermal stress.
Neither hardware life cycles or disposal plans are currently codified into any national regulations. Access to maintain the servers will rely on remote-operated vehicles or dive teams, in contrast to the always-present access that land-based data centers enjoy.
“According to the experts at Cervicorn Consulting, the global data center infrastructure market size was valued at USD 77.21 billion in 2025 and is expected to be worth around USD 264.97 billion by 2035, exhibiting at a compound annual growth rate (CAGR) of 13.12% over the forecast period from 2026 to 2035.”
Considering the boom in overall data center infrastrcuture, it is estimated by our experts that the underwater data center capacity could exceed 500MW by 2028 and range between 3000-5000MW by 2032, as the manufacturing process is modularized, cutting building costs by 40-50% compared to today. Mature, wind-integrated UDCs are expected to achieve deployment costs of $15-20M per MW by maturity, which will be on par with luxury land-based buildings in the most tight water-constrained coastal markets.
In addition, it is also estimated that UDCs will result in 70-95% premium for Capex compared to standard land-based facilities. However, on a 10 year total cost of ownership perspective, land saving and water saving will lead to cost competitiveness/advantage in the water stressed, land cost expensive coastal market. Cost savings from land acquisition (75-90%), power costs of cooling (65-75%), zero water costs, very minimal carbon costs and much smaller ESG compliance costs combined will compensate the construction Capex premium.
A plausible path with 55% probability, is niche deployment in 8-12 specific markets, where land/water availability, offshore wind resources, and regulation co-locate. Within this scenario, underwater data centers will constitute 3-5% of all new data center investment in 2030, becoming a commodity solution for leading offshore developers, whose organizations will either acquire data center players, or form joint ventures with them, while hyperscalers will deploy UDCs as captive capacity where they can't develop on land.
The stakeholders that will shape the sector over the next decade will be those with the skills, partnerships, and political capital to operate at the junction of digital infrastructure, offshore energy and marine engineering – a scarce set of skills where first mover advantage remains and strategic stakes run high.