El Niño 2026: Where It Stands and What It Means for the California Coast

The 2026 El Niño is no longer a forecast. It formed in early June, it has strengthened every month since, and the official odds now favor one of the strongest events on record by the end of the year. On the California coast you can already see it: warm water, tides running higher than the tables say, and fish from Baja showing up farther north than usual.

This post covers where the event stands in early October, what it is already doing off the Central Coast, what past super El Niños did here, and how to plan your time on the water this winter. For the sea-level side in depth, with our own NOAA tide-gauge analysis, see The Kelvin Wave Reaching California.

The short version

• It's very strong and still growing. NOAA's Climate Prediction Center (CPC) gives a greater than 90% chance of a very strong El Niño this fall and winter, and a 75% chance that October to December beats every El Niño since 1950.
• The coast is already warm. A marine heatwave that began in May 2025 is still on the central and southern California coast, and NOAA expects heatwave conditions off California through the end of 2026.
• The sea is higher. Kelvin waves from the equator have lifted water levels on every California tide gauge since early summer. Strong El Niños typically add 6 to 10 inches in winter.
• Winter is the risk. Strong El Niños raise the odds of a wet, stormy winter with big west and southwest swells. The worst damage comes when a storm lands on a king tide.
• It isn't guaranteed. The 2015-16 super El Niño brought huge surf but an ordinary rain year to Southern California. Strong odds are still odds.

Where the El Niño stands

Source	Date	What it says
NOAA CPC ENSO discussion	Sep 10, 2026	El Niño Advisory. "El Niño is strengthening, with a greater than 90% chance of a very strong event during the Northern Hemisphere fall and winter 2026-27."
CPC record odds	Sep 10, 2026	75% chance, for October to December, of a 3-month index of +2.5 °C or more, stronger than any event since 1950
CPC ocean observations	Sep 10, 2026	Niño-3.4 at +1.8 °C in August; surface anomalies above +3 °C in the eastern Pacific; subsurface anomalies "in excess of +10.0°C at depth"
NOAA California Current IEA	Sep 25, 2026	Warmer-than-normal water expected along the whole West Coast through winter, possibly into spring
California Coastal Commission	Sep 11, 2026	Memo warning of a "potentially historic El Niño event" and urging coastal property owners to prepare now
California Governor	Sep 21, 2026	State of emergency for El Niño preparedness: sandbags and pumps staged, permits fast-tracked

The trend matters as much as the numbers. In June, Daniel Swain (Weather West) put the odds of a very strong event at 63%. By August the Coastal Commission was quoting 69% odds of a historic event, and by September CPC had 75%. Each update has pushed the event stronger.

CPC releases its next ENSO discussion on Thursday, October 8. We'll update this post when it lands.

What it's already doing off the Central Coast

Warm water

NOAA's California Current Integrated Ecosystem Assessment (IEA) tracks two marine heatwaves. The first, labelled NEP25A, has sat on the central and southern California coast since May 2025. A second, NEP26A, has formed far offshore but hadn't reached the coast as of September 25. NOAA's forecast gives an 80 to 100% chance of marine heatwave conditions off California through the end of 2026, and the IEA flags "the prolonged duration of elevated ocean temperatures" as the main concern, more than the peak.

Our own fishing reports logged 66 to 67.5 °F at NDBC buoy 46011 (off Point Arguello) in late September, warm for the open coast at this time of year. Divers in Southern California report water running 3 to 5 °F above the 30-year average. The SST tile on the Conditions Console and the SST layer on the Coast Map show the current numbers for every station.

One surprise: upwelling hasn't shut off. The IEA reports the upwelling indices (CUTI and BEUTI) at "average to slightly below-average values for this time of year." That's why the nearshore food web is still holding up (see below). In past strong El Niños, upwelling weakened most in winter, when the storm track shifted south.

Higher tides

El Niño pushes warm water east along the equator, and when that pulse hits the Americas part of it turns north as a coastal-trapped Kelvin wave. NOAA Fisheries says each wave raises sea level by "approximately 15 cm or 6 inches" at tide gauges. Our analysis of NOAA data found Port San Luis running 2.5 to 5 inches above the same weeks of 2025 since July, and Southern California gauges 6 to 7 inches above in late September.

You can watch this live. On the Conditions Console the Now panel shows water level vs predicted. A residual that stays positive for days through every tide is the El Niño signal, not weather. On Tide Intelligence the residual lane under the 72-hour chart shows the same thing.

Fish and wildlife from the south

NOAA Fisheries lists the species to watch for during El Niño: yellowfin tuna, dorado and striped marlin moving north, market squid shifting north with the fleets following, and pelagic red crabs, normally a Baja species, washing up on California beaches. Southern California anglers have been catching yellowfin and yellowtail since summer.

The local news isn't all bad yet. The IEA reports central California rockfish and anchovy productivity "remains high," and juvenile salmon catches off Oregon and Washington are near average. Krill is below average, though it may just be deeper than the surveys reach. That is good news for this fall's whale watching and rockfish trips, but it may not last: in past strong El Niños, the cold-water food web suffered most from winter into spring, and NOAA Fisheries notes pelicans and Brandt's cormorants often fail to breed.

What past super El Niños did here

The California Coastal Commission's memo lists 1982-83, 1997-98, 2009-10, 2015-16 and 2023-24 as El Niño winters with severe coastal erosion. Three of them are the benchmarks:

Winter	What happened on the coast
1982-83	Big storm waves on very high tides. Heavy rain, flooding, landslides, erosion and damage to coastal structures. Still used as a "design" event for new coastal development.
1997-98	Repeated storms, heavy rain, landslides and coastal erosion statewide. Port San Luis monthly mean sea level peaked about 7.6 in above normal in November 1997.
2015-16	Extreme wave energy and record shoreline retreat, but less structural damage because storms tracked farther north. Rain was ordinary statewide and below normal in Southern California.

The Commission's key lesson is about timing: "the most damaging storms are often those that coincide with the highest tides." It also notes that the El Niño swell comes more from the west and southwest, which hits beaches and bluffs that are sheltered from the usual northwest swell.

What it means for your plans this winter

Surf

A strong El Niño usually means more frequent large swells and more west and southwest angles. On the Central Coast that favors south- and southwest-facing breaks that are usually flat in winter, and it means bigger, faster-changing days at exposed spots. The higher sea level acts like a permanently higher tide: low-tide breaks get fewer good hours, and beach breaks may close out on the upper tide.

By spring, expect less sand. In 2016 many California beaches were stripped to cobble. Sandbars move, so a spot that worked last fall may not this winter.

Check the swell height, period and direction in the Conditions Console before you paddle out. At Port San Luis, the NW swell arrival card in Nearby sensors gives a window for when a long-period swell reading at buoy 46028 will reach the coast.

Fishing

• Offshore keep an eye out for warm-water species farther north than usual, and expect the fall rockfish bite to stay good while upwelling holds.
• Surf fishing big winter surf and moving sand will reshape the troughs perch hold in. Fish the days between swells.
• Small craft a stormy winter means more Small Craft Advisories. Check the wind and swell tiles and the buoy cards before launching.

Tidepools

The king tide series brings the winter's lowest afternoon tides too, down to about −1.8 ft at Port San Luis around December 24. A Kelvin wave raises the lows along with the highs, so expect those lows to come in a few inches higher than predicted. That's still an excellent tidepool tide, but go at the predicted low, not after it, and check the residual first. The Tide Intelligence tidepool planner lists the best daylight lows.

Storm days

• Know the king tide dates. The Coastal Commission's king tides this season are November 24 to 26, December 23 to 25 and January 21 to 22. A storm on one of those days is the worst case.
• Stay off low seawalls, jetties and bluff edges when surf and a high tide line up. Bluffs from Shell Beach to Cambria erode fastest when high water lets waves reach their base.
• Watch burn scars and creek mouths. The Commission warns that strong El Niños bring "extended periods of high intensity rainfall," with mudslides and debris flows most likely below recently burned slopes.
• Sign up for alerts with Listos California for your county.

What could go wrong with the forecast

A strong El Niño loads the dice. It doesn't decide the outcome. The Coastal Commission puts it this way: "there are many varieties or 'flavors' of El Niño that can contribute to different climate outcomes in California, and only time will tell if this winter has above or below average rains and coastal storms."

The 2015-16 event is the reminder. It was one of the three strongest on record, and it still brought only an ordinary rain year to most of the state. Daniel Swain called it the only modern exception among the big events, while noting that a very strong El Niño "might well be the single most important predictor of substantially increased odds of unusually wet conditions." The higher sea level, on the other hand, is already measured. Whatever the rain does, the extra water will be there on the king tides.

How to follow it on this site

• Conditions Console: water level vs predicted, SST, swell and nearby buoys, updated live.
• Tide Intelligence: the 14-day tide calendar, spring/neap cycle, tidepool plan and the observed vs predicted residual.
• Coast Map: SST and swell for all 17 stations, plus every NDBC buoy, so you can watch warm water and storm swell move along the coast.
• The Kelvin Wave Reaching California: our NOAA tide-gauge analysis and how this year compares with 1982-83, 1997-98 and 2015-16.

Sources

• NOAA Climate Prediction Center, ENSO Diagnostic Discussion, September 10, 2026
• NOAA, California Current Ocean Assessment Status Takeaways (C-COAST), September 25, 2026
• California Coastal Commission, El Niño for 2026-2027 Winter Season (informational memo), September 11, 2026
• NOAA Fisheries, Ocean Indicators We're Tracking for El Niño's Arrival on the West Coast, September 3, 2026
• Office of the Governor, Governor Newsom proclaims state of emergency to bolster statewide El Niño preparedness, September 21, 2026
• Daniel Swain, Weather West, Rising odds of a strong-to-historic El Niño event in 2026, June 11, 2026
• San Francisco Chronicle, New California maps show the likelihood of a wet El Niño winter
• Spearfactor, El Niño 2026 Update: What California Divers Are Seeing (water temperature anomalies)
• Buoy water temperatures: NDBC station 46011, as logged in our field reports for late September 2026