Southern California First Rainy Halloween in Decades as Record King Tides Flood Coast and Huntington Beach Declares Emergency

Two Different Water Stories Arrive In The Same Halloween Week

Southern California is facing a Halloween weekend unlike any in living memory for many of its residents, and it is facing it from two directions at once. On one side, a storm system is forecast to bring rain to the region on Halloween itself, Saturday, October 31, 2026, with the heaviest rain expected during the very hours when children are out trick-or-treating. On the other side, exceptionally high tides, known as king tides, have already been flooding parts of the California coast since October 26, closing roads, pushing seawater into streets, homes and businesses, and prompting a local emergency declaration in Huntington Beach. These are two different phenomena, and it is important not to confuse them. The Halloween rain comes from a storm system moving into Southern California from the southwest, carrying moisture that meets colder air to the north. The coastal flooding that came first comes from the tides themselves, driven by the alignment of the moon and sun and lifted further by unusually warm ocean water and onshore winds. One is rain falling from the sky on Halloween night. The other is the sea rising higher than usual onto land that is normally dry. Both, however, are arriving in the same week, and together they have turned an ordinary holiday weekend into a test of planning for families, coastal residents, drivers and emergency workers across the region.

The Halloween Storm: When The Rain Is Expected

Forecasters have been tracking the Halloween storm for several days, and their message has become clearer as the weekend has approached, even as they continue to warn that exact timing and amounts remain uncertain. Scattered showers began to appear in parts of Southern California on Friday morning, October 30, offering an early preview of the heavier rain to come. The main storm was expected to move toward Southern California on Saturday afternoon and evening, before moving inland on Sunday. The National Weather Service warned that the most significant rainfall would likely coincide with peak trick-or-treating hours on Saturday night, before intensifying overnight into Sunday. That timing is the crux of the problem for families: the hours when neighbourhoods are fullest, with children in costumes walking from door to door in the dark, are the same hours when forecasters expect the heaviest downpours. Saturday morning and early afternoon were expected to offer a brief reprieve, with only scattered sprinkles and rainfall accumulations generally staying below one-tenth of an inch during the day, before conditions deteriorated after sunset. The storm was then expected to gradually lose its grip on Sunday morning, with most rainfall clearing out by Sunday afternoon, followed by a weak high-pressure system bringing drier and warmer conditions early in the following week. A slight chance of showers could return later in the week, forecasters said, but additional rainfall then appeared unlikely.

Why A Rainy Halloween In Southern California Is Historically Rare

Rain on Halloween is unusual in Southern California, and the historical records explain why this weekend has drawn so much attention. Los Angeles could experience its first wet Halloween since 2014, when a quarter of an inch of rain fell in downtown Los Angeles, according to weather service records. Before that, the city had no recorded Halloween rain since 2003, when about half an inch fell, and the previous wet Halloween before that was in 1987, when 1.39 inches were recorded. In other words, a child born in Los Angeles after 2014 may never have trick-or-treated in the rain, and many adults will have only faint memories of doing so. The picture is even more striking further south and inland. The last Halloween with measurable rain in San Diego was in 1987, according to the National Weather Service, and USA Today reported that the same is true for Palm Springs and Riverside. San Diego has seen only nine Halloweens with measurable rain since 1850, the most recent being in 1987, according to the FOX Forecast Center. The National Weather Service office in San Diego put the point bluntly in a post quoted by USA Today, saying it had been 30 to 40 years since many of its cities had seen a rainy Halloween. For San Diego, a first measurable Halloween rain in 39 years would therefore be a genuinely historic event, not merely an inconvenience, and it helps explain why forecasters, local news outlets and families have all been watching this storm so closely.

How Much Rain, And Where It Will Fall Hardest

The forecast amounts are moderate by the standards of a major winter storm, but they are more than enough to soak costumes, flood low spots and make driving hazardous on a night when roads are already busy with pedestrians. Forecasters expected widespread rainfall totals between half an inch and 1.5 inches across Southern California, with some mountain and foothill communities potentially receiving as much as 2.5 inches, particularly on south-facing mountain slopes. In Los Angeles and Orange counties, forecasts called for 0.25 to 1 inch of rain in most areas, with up to 2 inches possible on favoured mountain slopes, and rainfall rates of 0.10 to 0.33 inch per hour. The National Weather Service office in Los Angeles put the range for most areas of Los Angeles County at 0.5 to 1.5 inches through Sunday, with local amounts up to 2.5 inches on south-facing slopes. For Orange County, the chance of more than an inch of rain was put at 35 to 45 percent across much of the county. Local estimates reported before the weekend gave a sense of the variation from place to place: San Bernardino could receive around an inch of rain, while Woodland Hills and Burbank might see approximately four-tenths of an inch, Santa Clarita slightly more, and Palm Springs nearly an inch. Forecasters also estimated a 10 to 20 percent chance of isolated thunderstorms on Saturday night into early Sunday, particularly across southern portions of the region, adding lightning to the list of hazards. Temperatures were expected to fall as well, with daytime highs in the upper 60s to low 70s under mostly cloudy skies, and Halloween night temperatures dipping into the 50s in some areas. The National Weather Service was careful to stress the uncertainty in all of this: it warned that rainfall predictions remained uncertain, with a 20 percent chance that some areas could receive either double or half the currently projected amounts. That uncertainty is not a failure of forecasting; it reflects a system that forecasters themselves described as challenging to pin down, fuelled by a collision between chilly northern air and a surge of moisture moving in from the southwest, in what some reports described as a low-end atmospheric river, sometimes called a pineapple express, carrying moisture from near Hawaii.

King Tides: A Separate Coastal Emergency

While families were preparing for a wet Halloween, coastal communities were already dealing with water of a different kind. Exceptionally high tides have flooded coastal communities across California since October 26, 2026, inundating homes, businesses and roads, forcing closures along Pacific Coast Highway and prompting a local emergency declaration in Huntington Beach. The National Weather Service recorded a water level of 8.52 feet above mean lower low water at the San Diego tide gauge on Tuesday, October 27, the highest measurement in that station’s record, exceeding the previous day’s record of 8.44 feet. In Huntington Beach, emergency conditions began on October 26 and continued through October 29, according to documentation prepared for the city council, with tides reaching 8.20 feet during the week and producing widespread flooding in Huntington Harbor and Sunset Beach, two of the city’s most exposed waterfront communities. Flooding forced the closure of sections of Pacific Coast Highway, including the stretch between Warner Avenue and Anderson Street, and of Saybrook Lane between Edinger Avenue and Humboldt Drive, restricting coastal traffic and access to affected neighbourhoods. Reports described water covering about half of Pacific Coast Highway between Warner Avenue and Anderson Street in Sunset Beach, reaching shin or knee depth in some spots, with crews closing the road and pumping water from the area. Other coastal communities were hit as well: seawater entered streets, homes and businesses from Malibu and Redondo Beach to Long Beach and Newport Beach, water repeatedly breached the seawall at Redondo Beach’s International Boardwalk and entered bars and restaurants, and Newport Beach’s Balboa area saw widespread flooding. Newport Beach recorded a record-breaking high tide of 8.4 feet on October 27, and the city also declared a local state of emergency ahead of the flooding. In Huntington Beach, local reporting put the number of damaged properties at more than 100, although no comprehensive statewide damage total or casualty count had been established in the reporting reviewed for this article, and readers should treat any wider damage figure with caution until officials publish one.

Why The Tides Ran So High

King tides occur when the gravitational pull of the moon and sun aligns to produce exceptionally high tides, and they are a regular, predictable part of the tidal calendar. What made the late-October tides exceptional was how much higher the water ran than even those high predictions. The National Weather Service office in San Diego reported observed high tides running approximately 1.3 to 1.6 feet above astronomical predictions, and a tide gauge at San Pedro reached 8.02 feet on Monday, topping the previous record of 7.93 feet set in January 2005, before rising further in the following days. Forecasters attributed part of the extra height to sea levels running around 17 inches higher than a year earlier, partly because unusually warm ocean water is expanding as a strengthening El Nino develops, with water at Scripps Pier reported at a record temperature for the date. Onshore winds and elevated seas added to the effect, pushing water further inland at high tide. The result was that a predictable astronomical event became a flooding event: beach parking lots, bike paths and harbour walkways were inundated, low-lying roads were closed, and beach erosion was described as moderate to significant in places. The late-October event arrived ahead of the California Coastal Commission’s designated winter king-tide observation periods, scheduled for November 24 to 26 and December 23 to 25, 2026, and January 21 to 22, 2027, and the National Weather Service office in San Diego noted that predicted astronomical high tides during those coming winter events would be higher than those associated with the October flooding, a warning that coastal residents will be watching closely.

Warnings further north also matter for the weekend. The coastal warnings were not confined to Southern California. The National Weather Service extended coastal flood advisories around San Francisco Bay, San Pablo Bay and Monterey Bay through November 1, with floodwaters potentially reaching 1.9 feet above ground level in some areas, along with possible road closures and additional shoreline erosion. In Southern California, a coastal flood warning covering Orange and San Diego counties expired at 1 p.m. Pacific time on October 29, but a lower-level coastal flood advisory remained in force until 2 p.m. on October 30, and a coastal flood advisory remained in effect through 2 p.m. on Friday for beaches in Los Angeles, Orange and Ventura counties, where elevated tides and surf reaching 4 to 5 feet could trigger minor flooding. High tides of 6 to 7 feet were expected on Friday morning, although forecasters said coastal flooding should be less severe than earlier in the week as the peak tides began to ease. That easing does not mean the coast is in the clear: lingering onshore winds, rough surf and additional high tides could keep flooding and beach erosion concerns alive into the following week, and the distinction between a warning and an advisory matters. A warning generally signals flooding that is expected and potentially hazardous, while an advisory signals minor flooding that can still close roads and damage property in low-lying places. Residents and visitors should therefore check the latest advisory for their specific beach or neighbourhood, rather than assuming that because one county’s warning has expired, every nearby coast is safe.

Practical Advice For Trick-Or-Treaters, Drivers And Coastal Residents

For families, the practical advice from forecasters is straightforward and worth following. If you are headed out to trick-or-treat, take an umbrella and rain boots, as one television meteorologist quoted in reporting advised, and be prepared for conditions to worsen after sunset even if the daytime hours stay mostly dry. Costumes that are hard to see in the dark become harder still in rain, so reflective material, a torch or a light, and a route that avoids flooded or poorly lit roads are sensible precautions, and parents may wish to shorten routes or bring children home earlier if heavy rain or lightning arrives. Drivers should expect wet roads, reduced visibility and the possibility of sudden closures, particularly along the coast, and should check official road information and the latest National Weather Service advisories before setting out, allowing extra time for journeys that would normally be routine. Where a road is closed because of flooding, the closure should be respected rather than driven around, since water depth on a flooded road is difficult to judge from a car and conditions can change quickly at high tide. Coastal residents in low-lying neighbourhoods should keep an eye on tide times and on local council notices, move valuables and vehicles to higher ground where that is possible, and be ready for pumps, sand berms and sandbags to be deployed again if high water returns. The storm itself is not forecast to be a major storm by national standards, and forecasters have stressed that there is no widespread extreme cold expected, but a moderate storm arriving on the busiest pedestrian night of the year for children is enough to demand care.

What Happens Next After Halloween

By Sunday afternoon, forecasters expected most of the Halloween rainfall to have cleared, with a weak high-pressure system bringing drier and warmer conditions on Monday and Tuesday, with high temperatures reaching the upper 60s and 70s. That drier spell will give families a chance to dry out costumes and give coastal crews a chance to clear debris, repair berms and assess damage from the tides. It will not, however, end the coastal story. The winter king-tide periods in late November, late December and late January are still to come, with higher predicted astronomical tides than those seen in October, and forecasters have already warned that those events could bring water several inches higher again. Coastal cities will therefore be reviewing what worked and what did not during the October flooding: which roads needed to close earliest, which neighbourhoods needed pumps and sandbags first, and how quickly emergency declarations and public notices reached residents. For Southern California as a whole, Halloween 2026 will be remembered either as the year the long dry streak finally broke in Los Angeles and, after 39 years, in San Diego, Palm Springs and Riverside, or as a near miss in which the rain arrived just after the trick-or-treating hours or fell just short of measurable amounts in some cities. Either way, the week has already shown how two separate water hazards, a storm from the southwest and a sea lifted by moon, sun and warming water, can combine to reshape a holiday weekend, and why checking an official forecast, rather than relying on habit or on a clear sky in the morning, matters more than ever on Halloween night.

Sources

USN reviewed reporting from multiple outlets for this story. Read more from New York Post, USA Today and Fox Weather.