Arctic swimmer Lewis Pugh warns of climate tipping points ahead of COP-26

Lewis Pugh pulled on his swimming cap and speedos each morning for twelve days straight, stepping into waters so cold they seemed to belong to another world. The Illulissat Icefjord in Greenland, where he swam, is a place of sharp ice shards and the constant barks of huskies—what locals call the sled dogs. Some nights he woke asking himself how much longer his body could endure it. But a single day's swim would not have been enough to tell this story. The scale of what was happening demanded sustained witness.

Pugh is the UN Patron of the Oceans, a title earned through decades of endurance swimming—he was the first person to complete long-distance swims in every ocean and across the North Pole. Yet the 7.8-kilometer swim across the Illulissat glacier proved his most grueling challenge. As he moved through the water, he watched the ice around him, understanding with visceral clarity what the satellite images he would later show to journalists could only hint at: the Greenland Ice Sheet is melting at a rate without precedent. The Arctic, he says, is the fastest-warming region on Earth.

Days before COP-26, sitting in a London hotel lounge far from that frozen landscape, Pugh spoke with urgency about what he had witnessed. The political world was preparing to commit to net-zero emissions by 2050, but he found such timelines insufficient. The science, he insisted, is unambiguous: time is running out. He pulled out his phone to show satellite images of the glacier, kneeling beside his interviewer to explain the mechanisms of ice movement with the precision his role demands. If the entire Greenland Ice Sheet were to melt, sea levels would rise by more than seven meters. A single meter of rise would be enough to submerge London, Tokyo, and New York. "It's only when you see it live that you realise you can't negotiate with nature," he said.

Pugh's commitment to the ocean runs deep into his personal history. He grew up in Plymouth, Britain's Ocean City, and at nine years old witnessed the River Tavy overflow during a flood, watching his father wade into swirling water to salvage the family car. That childhood encounter with nature's force shaped him. He studied maritime law at the University of Cape Town and Cambridge, and his time in South Africa during the final years of apartheid instilled in him a conviction that when change comes, it arrives with unstoppable momentum. He wants that momentum to arrive in Glasgow for COP-26.

The physical toll of the Greenland swim was severe. Pugh's core body temperature required constant regulation—he was greeted after each swim with three hot water bottles and steaming chocolate. He describes the experience of swimming in zero-degree water as "almost intolerable." Yet his body's narrow band of thermal regulation mirrors a larger truth: both humans and the planet operate within a similarly constrained comfort zone. A few degrees separate life from death for a swimmer; a two-degree warming of Earth would trigger widespread water scarcity, crop failures, and increased flooding across the globe.

Before COP-26, Pugh is calling for thirty percent of the world's oceans to be designated as Marine Protected Areas, a measure he argues will make them more resilient to climate change. So far, eighty-six nations have committed to this goal. When asked what ordinary people can do, he emphasized that every purchase is a decision about the future. If 7.7 billion people made environmentally conscious choices daily, he said, that would create meaningful change. His mantra is simple and stark: "Ice is as essential to life on earth as the air we breathe." In the weeks before the climate conference, he carries a message from the polar regions to the negotiating tables—a voice for the oceans, speaking on behalf of ice that has endured for millennia and may not endure much longer.