For years, Portugal sat on the periphery of Europe’s digital infrastructure map. Today, that perception is changing fast. A powerful convergence of geography, renewable energy and global demand for cloud and artificial intelligence infrastructure is repositioning the country as one of Southern Europe’s most compelling data centre destinations - not as a speculative play, but as a structural shift in how Europe’s digital backbone is being rebuilt.

Portugal’s Atlantic-facing geography is the starting point. Cable landing stations in Sines and Carcavelos have transformed the country into a natural bridge between Europe, North America, South America and, increasingly, Africa. The Fortaleza–Lisbon–US East Coast corridor has dramatically improved latency and resilience, reducing transmission times between Europe and Brazil by an estimated 50%. For hyperscalers and cloud operators, proximity to subsea infrastructure is no longer a nice-to-have; it is fundamental. In this respect, Portugal has moved decisively to the centre of global data flows.

That connectivity advantage is being reinforced by a broader rebalancing of Europe’s data centre geography. Traditional hubs such as Frankfurt, London, Amsterdam, Paris and Dublin are facing increasing constraints: grid congestion, land scarcity, rising power prices and increasingly complex regulatory hurdles. Southern Europe, by contrast, offers room to scale, and Portugal stands out within that shift - a dynamic that will be explored in greater depth during our upcoming dedicated webinar Why Portugal is becoming Southern Europe’s next data centre hub

“What we are seeing is not hype-driven expansion, but a rebalancing of Southern Europe’s data centre geography,” says David Moura-George, Managing Director at Athena Advisers. “Portugal combines power availability, Atlantic connectivity and room to scale in a way that many established markets simply no longer can.”

Energy is central to that equation. Portugal operates one of the cleanest electricity mixes in Europe, heavily weighted towards renewables and closely aligned with the decarbonisation targets of global technology companies. When competitive power pricing is added to the mix, the country’s appeal becomes difficult to ignore. New data centre developments are increasingly integrating renewable generation, advanced cooling systems and heat-reuse technologies, reinforcing Portugal’s sustainability credentials at a time when environmental scrutiny is intensifying across the sector.

The scale of ambition now at stake is significant. By 2031, installed IT power capacity is projected to grow over 40 times its current level, reaching about 1.5 gigawatts, with related investments anticipated to surpass €13 billion. Most of this momentum is centred in Sines, where publicly discussed projects alone surpass 1 GW of planned capacity, a concentration that has materially changed how Portugal is perceived by international operators. “The focus on Sines reflects a broader shift towards coastal, cable-adjacent campuses,” Moura-George notes. “This isn’t about one country moving ahead of another, but about how data infrastructure is being reorganised across Europe.”

Market dynamics are evolving in parallel. While enterprise facilities still dominate Portugal’s existing installed base, growth is clearly skewed towards colocation and hyperscale-ready assets designed for higher power densities and AI-driven workloads. According to Portugal DC, the sector’s contribution to national GDP could rise from €160 million in 2024 to €3.7 billion by 2031, while employment more than triples to around 9,500 highly skilled jobs. Construction, utilities, engineering and professional services all stand to benefit from this investment cycle.

That momentum, however, is not without its challenges. Planning and permitting processes are becoming more complex as national and EU regulatory frameworks evolve, introducing uncertainty into development timelines. More critically, Portugal faces a shortage of specialised data centre talent. Without sustained investment in training and closer alignment between industry and education, labour availability risks becoming a binding constraint.

“We don’t see Portugal replacing Europe’s established data centre hubs but increasingly complementing them as a Southern European anchor for large-scale, next-generation infrastructure,” Moura-George concludes. “Execution, particularly around permitting and skills, will determine whether today’s projections translate into lasting competitiveness.”

Portugal’s proposition is nonetheless clear: a renewable-powered Atlantic gateway at a moment when Europe’s traditional data centre markets are reaching their limits. Whether that potential hardens into long-term leadership will depend less on headline forecasts and more on the country’s ability to convert strategic advantage into delivered capacity.

Discover the trends shaping Portugal's data centre market by joining our webinar. Register now to explore the opportunities.

By David Moura-George, Managing Director at Athena Advisers