Is 2026 El Niño or La Niña? What's Happening Right Now

Published: July 25, 2026 · Updated live with NOAA weekly ENSO updates

The Straight Answer: El Niño

If you landed here from Google typing "is 2026 el niño or la niña" — the answer is El Niño. NOAA's Climate Prediction Center officially declared the onset of El Niño conditions in May 2026. The declaration came after the Oceanic Niño Index (ONI) showed sea surface temperatures in the Niño-3.4 region running at least 0.5°C above the 1991-2020 average for five consecutive overlapping three-month periods, and after atmospheric coupling was confirmed — meaning the atmosphere was responding to the warmer ocean in the textbook El Niño pattern.

This isn't a borderline call. By July 2026, the Niño-3.4 anomaly reached +1.4°C, firmly in moderate-to-strong El Niño territory. Subsurface temperature anomalies are running at +3.0°C at 100-200m depth. The Southern Oscillation Index (SOI) has been consistently negative for months. Trade winds across the equatorial Pacific have weakened measurably. Every indicator points the same direction.

How NOAA Makes the Call

NOAA doesn't declare El Niño on a whim. The operational definition requires two things to happen at the same time:

1. The ocean threshold: The three-month running mean of Niño-3.4 SST anomalies must reach +0.5°C or higher for at least five consecutive overlapping seasons. This isn't a one-month blip — it has to stick.
2. Atmospheric coupling: The atmosphere has to respond. That means the trade winds weaken, convection shifts eastward, and the SOI goes negative. Without atmospheric coupling, you just have warm water — not an El Niño.

Both conditions were met by May 2026. The CPC's ENSO Alert System moved from "El Niño Watch" to "El Niño Advisory" status.

This is the same framework that caught the 2015-16 and 2023-24 events. The difference this time is how early the signals converged — by February 2026, the subsurface heat buildup was already at levels normally seen in May or June before a strong event.

What the Data Shows Right Now

Here's the snapshot as of mid-July 2026:

• Niño-3.4 anomaly: +1.4°C (moderate-to-strong threshold)
• Niño-3 anomaly: +1.7°C (eastern Pacific warming faster than central)
• Niño-4 anomaly: +0.9°C (western Pacific also above normal)
• SOI (30-day): -12.3 (sustained negative = El Niño signal)
• Subsurface (0-300m): +1.8°C average, with pockets at +3.0°C at 150m depth
• OLR anomaly: Negative over the central Pacific (more convection = more thunderstorms shifted east)
• Trade winds: Westerly wind anomalies at 850mb across the western and central equatorial Pacific

In plain English: the ocean is warm, the atmosphere is responding, and the feedback loop is running. This is a fully coupled El Niño.

The ENSO Timeline: How We Got Here

The path to the 2026 El Niño wasn't a straight line:

• Mid-2024 to early 2025: La Niña conditions dominated, with Niño-3.4 running -0.7°C to -1.1°C. This was the tail of the 2023-24 ENSO cycle.
• March-April 2025: La Niña faded. ENSO-neutral conditions returned. No one was talking about El Niño yet.
• October-December 2025: Subsurface warming began. A Kelvin wave propagated eastward across the Pacific. Models started flagging a potential El Niño for mid-2026.
• February 2026: The CPC issued an El Niño Watch. Subsurface heat content exceeded 1.5 — historically a reliable precursor.
• March-April 2026: A series of westerly wind bursts in the western Pacific amplified the warming. Niño-3.4 crossed +0.5°C in late March.
• May 2026: NOAA declared El Niño conditions. Atmospheric coupling confirmed.
• July 2026 (now): Niño-3.4 at +1.4°C. Event is strengthening. Models project a peak of +2.0°C to +2.8°C in late 2026.

The speed of this transition — from La Niña to El Niño in roughly 14 months — is unusually fast. The average turnaround between ENSO phases is 2-3 years. The rapid switch has some climate scientists watching closely for what it might mean for peak intensity.

Could La Niña Come Back in 2027?

Probably, but it's too early to lock it in. History shows a strong pattern: major El Niño events are frequently followed by La Niña within 12-18 months. After the 1997-98 Super El Niño, La Niña arrived by July 1998 and lasted three years. After 2015-16, La Niña developed by August 2016. After 2023-24 (strong, not super), La Niña returned by mid-2024.

The mechanism is straightforward: El Niño discharges heat from the equatorial Pacific so thoroughly that the system often overshoots into the cold phase. The warm water that piled up in the eastern Pacific sloshes back west, cold water upwells, and the whole cycle flips.

But there's a wildcard: climate change is stacking the deck toward warmer baseline temperatures. The last three La Niña events (2020-23) were among the warmest La Niñas on record because the background ocean is simply hotter now. A 2027 La Niña might not feel as cool as past events.

Bottom line: if this El Niño peaks strong and decays normally, expect La Niña watch headlines by mid-2027. But don't bet your crop insurance on it yet — the CPC won't issue a meaningful forecast for 2027 until late 2026 at the earliest.

What This Means for You

If you're in California: watch for a wet winter. El Niño tilts the odds toward above-normal precipitation in the southern tier of the US, and California typically sees some of its biggest water years during moderate-to-strong El Niño events. If you're in Australia or Indonesia: prepare for drier conditions. If you're along the Gulf Coast or Atlantic seaboard: El Niño tends to suppress Atlantic hurricane activity through increased wind shear, though it's not a guarantee — 1992's Hurricane Andrew hit during an El Niño year. If you're in the Pacific Northwest or Canada: expect a milder, warmer winter.

The 2026 El Niño is still strengthening. Check our 2026 El Niño forecast page for the latest model runs, or bookmark the real-time ENSO dashboard for weekly data updates.