California lost 60% of its coastal dunes since 1850; now a 30-acre restoration project in Santa Monica is fighting sea-level rise

California's coastline is famous for its beaches, cliffs and ocean views, but one of its most important natural defenses has been disappearing for generations. Since 1850, California has lost an estimated 60 per cent of its coastal dunes, according to the Santa Monica Bay National Estuary Program. Today, a 30-acre restoration effort at Santa Monica Beach is working to rebuild this fragile ecosystem and strengthen the shoreline against a changing climate. The project shows why coastal dunes are far more than piles of sand: they are living landscapes that can provide habitat, capture windblown sand and create a natural buffer against coastal hazards, including sea-level rise.

Coastal dunes form where wind moves sand inland from the beach and vegetation helps stabilize it. Over time, these plants create a dynamic landscape that changes with seasons, storms and ocean conditions. Native dune vegetation can trap additional sand, allowing dunes to grow and shift naturally. This constant movement is part of what makes dunes valuable in coastal environments. Unlike a concrete wall, a healthy dune system can evolve as conditions change. When storms push waves farther inland, dunes can absorb some of that energy while providing sand that may later move back toward the beach.

The Santa Monica Beach Dunes Restoration Project is designed to restore a portion of this historic ecosystem. The Santa Monica Bay National Estuary Program identifies the project as a 30-acre effort focused on restoring coastal dune habitat at Santa Monica State Beach. Restoration involves bringing back native plants and improving conditions for a landscape that has been heavily altered by urban development and intensive beach use. Re-establishing native dune vegetation is particularly important because plants help hold sand in place while creating habitat for coastal wildlife.


The decline of dunes is closely connected to the history of California's coastline. Beaches near densely developed communities have been transformed by roads, buildings, recreation facilities, landscaping and other infrastructure. Heavy human use can disturb vegetation and prevent natural dunes from developing. In places where dunes once occupied large portions of the coastal landscape, much of the sand has been leveled, stabilized or otherwise altered. The result is a shoreline that can be more vulnerable because one of nature's protective systems has been diminished. Restoring even a portion of that lost habitat can therefore have significance beyond the project boundary.

Sea-level rise adds urgency to the restoration effort. As oceans rise, higher average water levels can allow waves and coastal flooding to reach farther inland, particularly during storms and extreme tides. Natural dunes can provide an important first line of defense by creating elevation between the ocean and inland areas. Their effectiveness depends on their size, condition, location and ability to move naturally, but restoring dune systems can be an important component of broader coastal resilience strategies. Santa Monica's project illustrates how communities can work with natural processes rather than relying exclusively on hard shoreline infrastructure.

The restoration also has a biodiversity dimension. Coastal dunes support specialized plants and animals adapted to salty air, shifting sand, strong winds and intense sunlight. Native dune vegetation can create pockets of habitat in an otherwise highly developed coastal environment. Restoring these plants helps rebuild ecological relationships that may have been disrupted when dunes disappeared. In an urban setting such as Santa Monica, these restored areas can serve as small but meaningful refuges for coastal species while demonstrating what a healthier Southern California beach ecosystem can look like.

Another important benefit is the role dunes play in sand management. A dune is not a static mound that simply needs to remain in one position. Healthy dunes are part of a larger beach system in which sand is continuously transported by wind and waves. Vegetation captures windblown sand and helps build dune volume, while storms can reshape the landscape. This natural cycle can make a restored dune system more resilient than a rigid landscape that prevents sand from moving. Restoration therefore means allowing the coast to retain some of its natural ability to respond to changing conditions.

The Santa Monica project also highlights a growing shift in how coastal communities think about climate adaptation. Sea-level rise cannot be addressed through a single solution. Communities need combinations of habitat restoration, careful land-use planning, infrastructure improvements, beach management and long-term monitoring. Nature-based approaches such as dune restoration can complement those strategies by providing environmental benefits while helping reduce exposure to coastal hazards. The value of a restored dune is therefore measured not only by the acres of habitat created, but also by the ecological and resilience services that landscape can provide over time.

For residents and visitors, the project offers another reminder that a beach is more than the flat strip of sand visible between the water and developed areas. Behind that familiar landscape can exist a complex system of dunes, plants, wildlife and moving sediment. Restoring that system requires balancing recreation with conservation. In a heavily visited destination like Santa Monica, protecting restored areas and allowing vegetation to establish can be just as important as the initial planting and construction work. Long-term stewardship is essential if restoration gains are to survive repeated storms, drought, human pressure and rising seas.

California's loss of roughly 60% of its coastal dunes since 1850 is a sobering measure of how dramatically the state's shoreline has changed. Yet the 30-acre Santa Monica Beach Dunes Restoration Project offers a more hopeful story. By restoring native coastal habitat and rebuilding a natural landscape, the project is helping demonstrate how nature itself can become part of the solution to modern coastal challenges. As sea levels continue to rise, preserving and restoring dunes could become increasingly important for communities along the Pacific coast. Santa Monica's effort ultimately shows that protecting beaches is not simply about preserving scenery—it is about rebuilding the natural systems that help coastal communities, wildlife and future generations withstand a changing ocean.