King Tide Prep Checklist for Newport Beach Homes
The next king-tide window is November 24 to 26, with the peak predicted at 6.9 feet at Balboa Pier on Wednesday, November 25 at 8:25 AM. Here is the checklist that keeps harbor water out of your home — drains, pumps, backflow valves, sandbags and the after-tide walk-through.
What a King Tide Actually Is — and Why This One Matters
A king tide is one of the highest tides of the year. When the sun, moon and Earth line up, their combined pull drags the ocean higher than a normal high tide, and in a harbor city built at sea level that extra height has nowhere to go but up through drains, across low streets and into ground floors. Newport Beach feels king tides more than most California cities because so much of its housing sits on filled land, peninsulas and islands: the Balboa Peninsula, Balboa Island, Lido Isle and the bayfront streets of West Newport are all within a few feet of high water, and the storm drains that normally carry rain away can run backward when the bay is higher than the street.
The November 24 to 26, 2026 window is confirmed by the California Coastal Commission through Orange County, and the peak at Balboa Pier — NOAA station 9410583 — is predicted at 6.9 feet MLLW on Wednesday, November 25 at 8:25 AM. Two things about that number deserve emphasis. First, it is a prediction, not an observed flood depth: it tells you when the water will be highest and roughly how high the tide itself will run, not how deep the water will be at your front door, which depends on your elevation, your drainage and the weather that week. Second, it is a different event from the October 26 to 28 window, and the observed figures from that event do not carry over to November. Do not plan around October's numbers; plan around November's prediction and the forecast as the dates approach, because a king tide that meets rain or swell floods considerably worse than the same tide on a calm, dry day.
After November, two more windows are on the calendar: December 23 to 25, 2026 and January 21 to 22, 2027. The checklist below is written for the November window, but it works for all three, and the cheapest time to do the permanent items — a check valve, a pump test, a backflow test — is now, while the work can be scheduled rather than done in a panic with water already on the street. If your home is in the low-lying areas that flood first, treat this page as a seasonal routine, not a one-off: every king-tide season rewards the homes that were prepared and bills the ones that were not.
One more piece of context that shapes everything else on this page. About 61 percent of Newport Beach housing predates 1980, which means a large share of the homes in the flood-prone areas also have the oldest pipes, the oldest laterals and the most original drainage in the city. A king tide does not just bring water in from outside; it stresses a system from below, pushing against cracked laterals, tired cleanout caps and pumps that have not run since last winter. The tide finds the weak point. The checklist exists so you find it first.
The Checklist: Two Weeks Out, Week Of, Day Of, After
Two weeks out: test the pumps
Pour water into every sump and ejector pit and watch the pump cycle on, discharge, and shut off. Listen for grinding or short-cycling, and check the discharge line outside for blockages. A pump that has sat idle since last winter is the single most common king-tide failure, and it is found in five minutes with a bucket of water.
Two weeks out: clear every drain
Clear patio drains, yard drains, area drains, gutters and downspouts, and sweep leaves and debris off grates. A drain that is half-blocked on a dry day is fully blocked when the tide pushes water back up it. Check the storm drain at your curb too, and report a blocked city drain rather than assuming someone else has.
Week of: seal the entry points
Check the sewer cleanout cap for cracks and a tight fit, and replace it if it is chipped or cross-threaded — it is a small part that keeps a large problem out. Confirm backflow protection is current: under NBMC Title 14, Chapter 14.10, backflow assemblies must be tested annually and after any installation, repair or relocation, by a certified tester, with the report filed with the city.
Week of: stage sandbags and supplies
Collect free city sandbags at 592 Superior Avenue, 1600 West Balboa Boulevard, or the temporary Fire Station No. 1 near Balboa Pier during events. Fill bags two-thirds full, stack them in a brick pattern across doorways, garage entries and low vents, and keep towels, a wet vacuum and a flashlight where you can reach them without wading.
Day of: ease off the system
At peak tide, go easy on water use if your drains run slow: postpone laundry and long showers, and avoid running the dishwasher. The sewer system has nowhere to push wastewater when the tide is high, and every gallon you add is a gallon competing for capacity. Move cars off low streets early, and lift anything stored on garage floors.
After: walk the property
Once the water recedes, walk the whole property: standing water, sewer smells, slow drains, damp spots near slab edges and low walls, and debris in drains and grates. Photograph anything unusual before it dries. A backup or sewer smell after a tide deserves a camera inspection — tides often expose a lateral that was already cracked, and catching it now is far cheaper than meeting it again in December.
The Plumbing Checks That Matter Most — and What They Cost
Most king-tide damage in Newport Beach is not dramatic. It is a pump that did not start, a cleanout cap that let water in, a lateral that was already cracked, or a backflow device that had not been tested in two years. The items below are the permanent fixes and checks behind the checklist, with typical-market ranges for planning. Every job is quoted in writing at a flat rate before work starts.
| Check or fix | Typical range | Why it matters at king tide |
|---|---|---|
| Sump or ejector pump inspection and test | $150–$350 | Finds the dead pump before the tide does |
| Backflow test and city filing (NBMC 14.10) | $85–$175 | Required annually; a failed device lets water back into your lines |
| Sewer cleanout cap replacement | $150–$350 | A cracked cap is an open door for tide water |
| Sewer camera inspection | $250–$450 | Shows cracks and roots the tide will exploit, before it does |
| Backwater check valve installation | $450–$950 | Stops sewer water from backing into the home when the system surcharges |
| Sump pump replacement | $1,200–$2,500 | For a failed or undersized pump in a below-grade area |
| Sewer lateral replacement (documented range) | $3,000–$15,000 | Only after camera evidence, priced by depth, length and method |
Ranges are typical-market figures for planning. A lateral is never quoted without camera footage: anyone pricing a full replacement by phone is guessing with your money.
Two Newport-specific notes belong here. First, dock and bayfront homes carry their own backflow obligation: every pier and dock needs an approved reduced-pressure device under the same NBMC chapter, and those assemblies live in the splash zone, so they corrode and fail faster than street-side units. If your home has a dock assembly, its test date matters as much as the house unit's. Second, homes in Newport Coast and Crystal Cove in ZIP 92657 sit on Irvine Ranch Water District water, not city water, with different backflow rules and a different supply — a technician who quotes you city rules without asking which system serves you is working from a script. For the related work, see flood and ejector pumps, backflow testing, dock and pier backflow and sewer line repair, or call (949) 693-0223 to schedule a pre-tide check while there is still time to fix what it finds.
Book a Pre-Tide Check Before November 24.
Pumps tested, drains cleared, cleanout and backflow checked — one visit, before the water arrives.
☎ Call (949) 693-0223King Tide Prep Checklist for Newport Beach Homes — FAQs
When is the next king tide in Newport Beach?
November 24 to 26, 2026. The peak at Balboa Pier is predicted at 6.9 feet MLLW on Wednesday, November 25 at 8:25 AM, according to NOAA station 9410583. Further windows follow on December 23 to 25, 2026 and January 21 to 22, 2027. These are predicted tide heights, not observed flood depths, so treat them as the planning window and watch the actual forecast as the dates approach.
What is a king tide, exactly?
A king tide is one of the highest tides of the year, when the sun, moon and Earth align to pull the ocean higher than usual. In Newport Beach that means bay and harbor water reaching streets, drains and low ground that normally stay dry, especially on the Balboa Peninsula, Balboa Island and in West Newport. A king tide is not a storm surge, but when it coincides with rain, swell or a low-pressure system, the flooding is worse than the tide alone would suggest.
Will my street flood during the November 24 to 26 king tide?
It depends on elevation and drainage, not on the tide number alone. Low-lying streets on the Balboa Peninsula, Balboa Island and in West Newport flood first, and homes near the harbor, the Grand Canal and the bayfront are most exposed. If your street ponded or your drains ran slow during a past king tide, expect the same or worse this time unless something about your drainage has changed. A predicted 6.9-foot tide is a warning to prepare, not a guarantee of a specific water depth at your door.
What should I do to my plumbing before a king tide?
Clear patio and yard drains and gutters, make sure your sewer cleanout cap is tight and undamaged, and test any sump or ejector pump by pouring water into the pit and watching it cycle. If your home has a backflow preventer, confirm its annual test under NBMC Title 14 Chapter 14.10 is current, because a failed device can let harbor or sewer water back into your lines. Keep sandbags ready, and go easy on water use at peak tide if your drains run slow, since the system has nowhere to push wastewater when the tide is high.
Where can I get free sandbags in Newport Beach?
The city provides free sandbags during king-tide events at 592 Superior Avenue, 1600 West Balboa Boulevard, and the temporary Fire Station No. 1 near Balboa Pier. Bring a shovel if you can, fill bags about two-thirds full so they stack, and place them in a brick pattern across doorways, garage entries and low vents rather than in a single row.
What should I check after the tide goes out?
Walk the property for standing water, sewer smells, slow drains and damp spots near slab edges and low walls. A backup or a sewer smell after a tide deserves a camera inspection, because tides often expose a lateral that was already cracked, and the documented range for a sewer lateral replacement in Newport Beach runs from about 3,000 to 15,000 dollars depending on depth, length and method. Run every ejector and sump pump once more, clear debris from drains and grates, and photograph anything unusual before it dries, since insurers and contractors both work from dated photos.