Underwater data centres: AI’s new frontier or an environmental gamble?

Tech giants test submerged servers to cut energy use by 30% amid AI-driven demand surge

Aryan Kumar 24 Aug 2026 ·11:18 · 11 hours ago

2 min read GLOBAL

Underwater — A floating data centre prototype off Yokohama, Japan, uses seawater for cooling and solar power.

THE ESSENTIALS

Microsoft’s underwater data centre near Scotland’s Orkney Islands saw servers fail at one-eighth the rate of land-based facilities.
China’s $226m wind-powered underwater data centre in Shanghai uses 30% less electricity than traditional sites.
More than half the world’s population lives within 120 miles of a coast, making offshore sites logistically viable.
Environmental concerns include warming seawater discharges, with some sites raising temperatures by 1°C.

The surge in artificial intelligence has triggered an unprecedented demand for data centers, pushing companies to seek alternatives beyond traditional land-based facilities. With concerns mounting over energy consumption, water use, and carbon emissions, some developers are turning to the ocean as a potential solution for more efficient AI infrastructure. Microsoft pioneered the concept in 2018 with a research project off Scotland’s Orkney Islands. The company submerged a waterproof data center containing 864 servers, which operated for two years before the project concluded in 2024. The results were notable: servers in…

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