More than three-quarters of the world's most celebrated surf breaks face high risk of degradation or destruction from sea-level rise and coastal development, according to a study published in the journal Climatic Change. Researchers analysed 57 breaks across 13 world surfing reserves in eight countries, drawing on nearly 200 local experts — the surfers themselves — to map vulnerability. The physics of a great wave is astonishingly fragile. Sea-floor shape, swell direction, tide level, and sediment supply must align precisely. Global heating is pushing up sea levels and altering rainfall patterns that govern sediment movement, upsetting that delicate equilibrium. The study names specific casualties: Croyde beach in north Devon, Noosa in Australia, Oriente Salvaje in El Salvador, and Santa Cruz reefs including Sewer Peak and Wind and Sea. The critical finding is about resilience geometry. Where coastlines remain natural, they can adapt — shifting inland, redistributing sediment — in ways that preserve wave quality. But where sea walls, jetties, and groynes have hardened the shore, beaches and breaks lose their capacity to adjust. Development locks the coastline in place precisely as the ocean demands it move. The wave gets crushed between a rising sea and an immovable wall. The economic stakes are not trivial. Santa Cruz alone generates roughly $200 million annually from surfing. Eastern El Salvador's economy is "pretty much dependent on surfing," according to Save the Waves Coalition's Trent Hodges. North Devon's Adam Hall describes surfers filling pubs and restaurants through the winter months when other tourist destinations are dead. These are not luxury amenities — they are primary economic engines in places with few alternatives. Some jurisdictions have already moved. Australia's Gold Coast has embedded surf protection in planning law. New Zealand designates surf breaks of "national significance." Peru's Ley de rompientes protects listed breaks by statute. These represent the policy frontier, but they remain exceptions. The researchers argue that surfers themselves are an underused monitoring network — people who notice when a wave changes shape before any instrument does. "When a wave changes, that often means the beach is changing," Hodges said. The study positions surf-break degradation as a canary for broader coastal ecosystem collapse, not a niche recreational concern. The paper's core tension is structural: the very infrastructure communities build to protect themselves from the sea — walls, groynes, armoring — is what kills the economic asset that sustains them. Thousands of additional surf breaks beyond the 57 studied face similar dynamics. The researchers want local surfers globally to use the assessment tools developed and work with authorities to protect waves from both climate change and the well-intentioned development responses that make things worse.