Aliso Beach in Laguna Beach has become the latest Southern California shoreline to show how quickly powerful waves can turn a familiar recreational destination into an infrastructure problem. On September 1, city officials closed part of the beach’s west parking lot after high tides and strong waves removed sand and undermined a section of pavement. Crews also removed electrical lines attached to nearby palm trees that were considered at risk of falling, removed failed pavement and moved sand to stabilize eroded edges. (Los Angeles Times)
The timing has raised additional concerns because Hurricane Marie is producing another significant swell for Southern California, even though the storm’s center is expected to remain well south of the region. The National Weather Service said Thursday that a large increase in surf is expected across Southern California from Saturday into Sunday, with conditions gradually easing around Labor Day and into early next week.
For Laguna Beach, the immediate concern is less about a direct hurricane strike than about what another round of energetic waves could do to a shoreline that has already lost substantial sand.
Aliso Beach Parking Lot Has Already Been Undermined
Aliso Beach is one of Laguna Beach’s major public coastal recreation areas, located at 31131 South Coast Highway. The city’s official listing identifies 258 parking spaces, along with outdoor showers, picnic tables, a playground and restrooms. That makes the parking lot an important piece of the visitor infrastructure supporting the beach. (City of Laguna Beach)
The September 1 closure affected part of the west parking lot after waves and high tides washed away sand beneath and alongside sections of the paved area. The city said crews removed portions of failed pavement and moved sand to backfill and stabilize the eroded edges while monitoring wave activity.
Officials also warned visitors to remain outside barricaded areas and away from the eroded edge.
That response is significant because parking lots are generally viewed as static infrastructure. At a beach, they are anything but static from an engineering perspective.
The shoreline underneath and around them can move.
When sand disappears, the elevation difference between the ocean and developed land can change quickly. Protective edges that normally remain buried may become exposed. Pavement that appears stable can lose support along its outer boundary. Utilities installed near vegetation or infrastructure can also become more vulnerable.
| Aliso Beach Infrastructure | Current Situation |
|---|---|
| Location | 31131 S. Coast Highway, Laguna Beach |
| Parking capacity | 258 spaces |
| Affected facility | West parking lot |
| Primary problem | Sand loss and erosion along parking area |
| Emergency work | Failed pavement removed; sand moved to stabilize edges |
| Electrical infrastructure | Lines near vulnerable palm trees removed |
| Visitor guidance | Stay outside barricades and away from eroded edges |
The city has not announced a definitive reopening date for the affected portion.
Hurricane Marie Is Adding More Wave Energy To The Coast
Hurricane Marie has developed into a major factor in the coastal forecast, even though Southern California is not expected to experience a direct hurricane landfall.
The National Hurricane Center reported Thursday morning that Marie was located approximately 380 miles southwest of the southern tip of Baja California, moving west-northwest at about 10 mph, with maximum sustained winds of 85 mph at 2 a.m. MST. Later Thursday, the National Hurricane Center increased the estimated intensity to 90 mph.
The important effect for Southern California is the storm-generated swell.
The National Weather Service office in San Diego said Thursday that Marie’s center will remain well south of the area but that a large increase in surf is expected Saturday and Sunday. The added moisture from Marie could also increase cloud cover and bring some showers during the weekend.
That distinction is important for beach visitors.
A storm does not have to approach directly to affect California beaches. Long-period waves generated far offshore can travel hundreds or thousands of miles before reaching the coastline. When those waves arrive at a beach that has already lost sand, their impact can extend farther inland.
The latest National Hurricane Center updates therefore matter even for travelers who are nowhere near the projected path of Marie.
Southern California Beaches Are Already Showing The Effects Of Extreme Waves
Aliso Beach is not an isolated case.
The September closure follows a summer of unusually visible erosion along Southern California’s coast. Tamarack State Beach in Carlsbad lost much of its sand after powerful Pacific swells, exposing riprap, affecting the parking area and forcing portions of the Tamarack parking lot to close.
The episode was especially notable because Carlsbad had placed approximately 400,000 cubic yards of sand dredged from Agua Hedionda Lagoon along its beaches in 2025. Much of that material was subsequently redistributed by natural coastal processes and powerful wave events.
That earlier story provides important context for Aliso Beach: Tamarack Beach erosion demonstrated how quickly a beach can change when wave energy overwhelms the existing sand profile.
Newport Beach has experienced a similar phenomenon. Powerful hurricane-driven swells stripped away layers of sand at The Wedge, exposing pieces of old infrastructure that had remained buried for decades.
At Point Dume in Malibu, roughly 60 feet of sand disappeared near a road that provides access to a parking area, prompting Los Angeles County officials to close portions of the facility.
Taken together, these locations reveal a regional pattern.
The issue is no longer simply whether individual beaches lose sand during major storms. The more consequential question is how quickly public infrastructure becomes exposed once that sand is gone.
Long-Period Swells Can Reach Farther Up The Beach
The physics behind the current situation helps explain why officials are concerned about another round of waves.
The National Weather Service office serving Northern and Central California issued a Beach Hazards Statement for Friday through Monday, warning that swell from Hurricane Marie and Hurricane Karina could produce breaking waves of up to 10 feet in some areas. Forecasters emphasized that long-period swell can travel farther up the beach and increase the likelihood of sneaker waves.
This type of wave energy can be deceptive.
A distant tropical cyclone may not look threatening from a California beach. The sky can remain relatively clear and temperatures can remain comfortable. Yet the ocean can carry the energy of a storm hundreds or more than 1,000 miles away.
That creates a particular challenge for popular recreational beaches during holiday weekends.
People may see normal summer weather and assume the ocean is equally calm.
At Aliso Beach, the physical evidence is already present. Sand has been removed, pavement has failed and city crews have had to stabilize the parking-lot edge.
Another increase in wave energy could test those temporary measures.
The Labor Day Timing Creates An Additional Safety Challenge
The erosion is occurring during one of the busiest travel periods of the year.
Laguna Beach’s summer parking program runs through September 7, 2026, meaning Aliso Beach is approaching the end of its peak-season parking period just as coastal conditions become more hazardous. The city’s Lot 22 listing identifies 258 spaces, including 14 accessible parking spaces.
The National Weather Service’s Thursday forecast for Orange County showed surf increasing from 1–3 feet Thursday, with sets to 4 feet, to 2–4 feet Friday, while the rip-current risk was expected to increase to moderate Friday.
Conditions are expected to become more significant over the weekend as Marie’s swell arrives.
For beach visitors, the safest response is not necessarily to cancel every coastal activity. It is to recognize that beach conditions can change even when weather conditions look favorable.
Laguna Beach’s own public guidance advises visitors to swim near a lifeguard, use a buddy system and check local conditions before entering the water.
Visitors should also avoid climbing around barricades or approaching damaged pavement to photograph the erosion.
The unstable edge is itself part of the hazard.
El Niño Could Make Coastal Erosion More Significant
The current erosion also arrives during a year when scientists are closely watching Pacific climate conditions.
The California Coastal Commission has documented the relationship between strong El Niño events and coastal erosion. During the 2015–16 El Niño, many California beaches experienced record erosion, including an average of roughly 150 feet of erosion in parts of Central California. The commission also cites research showing that coastal erosion can increase by more than 69% during extreme El Niño events, driven largely by changes in wave stress, wave direction and sea level. (California Coastal Commission)
That historical context does not mean every current erosion event can be attributed to El Niño.
Aliso Beach’s immediate damage was caused by the combination of high tides and strong waves.
The broader concern is that repeated energetic events can prevent beaches from rebuilding their sand profile between storms.
When that happens, infrastructure starts each new event from a more exposed position.
This is particularly relevant for coastal communities such as Laguna Beach, where public roads, parking areas, trails and recreational facilities are concentrated close to the ocean.
Laguna Beach Is Managing A Coastline That Cannot Be Held In Place
The challenge facing Laguna Beach is fundamentally different from repairing an ordinary parking lot.
Replacing damaged pavement is relatively straightforward.
Keeping the shoreline in a stable position is not.
Beaches are dynamic sediment systems. Sand can move alongshore, offshore and back toward shore depending on wave direction, tides, seasonal conditions and larger Pacific weather patterns.
Hard infrastructure can limit erosion at one location while altering the distribution of sand elsewhere.
That is why emergency repairs at Aliso Beach are likely to address immediate safety rather than permanently solve the underlying erosion problem.
The city must first stabilize the damaged area and keep visitors away from unstable sections. Longer-term decisions involve questions about beach nourishment, drainage, coastal protection, parking design and whether infrastructure should remain in its current position.
Those decisions become more difficult as extreme coastal events become more frequent or intense.
Aliso Beach Could Become Another Test Of Coastal Adaptation
The significance of the Aliso Beach closure extends beyond one damaged parking lot.
Within a matter of weeks, Southern California has seen major erosion concerns emerge at Carlsbad, Malibu, Newport Beach and Laguna Beach. Each site has different geology, infrastructure and exposure, yet the underlying issue is similar: beaches provide a natural buffer between powerful waves and developed coastal communities.
When that buffer becomes thinner, infrastructure inherits more of the ocean’s energy.
At Aliso Beach, the first response has been practical. Crews removed failed pavement, moved sand, removed vulnerable electrical lines and installed barriers. Those steps reduce immediate risks while officials monitor the shoreline.
The next test will come from the ocean.
Hurricane Marie is expected to remain well offshore, and there are no coastal watches or warnings associated with the storm at present. Yet the National Weather Service expects a significant increase in Southern California surf from Saturday into Sunday.
That makes the coming days important for Laguna Beach.
If the weakened shoreline withstands the next swell and begins rebuilding naturally, the parking area could eventually return to normal operations.
If another wave event removes additional sand, the city could face a larger infrastructure problem at precisely the point where summer visitation is reaching its seasonal peak.
For visitors, Aliso Beach is a reminder that coastal conditions can change faster than a travel itinerary. For Laguna Beach officials, it is another example of the growing challenge of maintaining public access while the shoreline itself continues to move.
The barricades around the damaged parking area may look temporary.
The coastal forces that created the damage are not.