Super El Niño 2026 Nears Record Strength as NOAA Puts Historic Peak at 83%

The 2026 El Niño has moved to within a tenth of a degree of the strongest event ever recorded, after new data from the United States National Oceanic and Atmospheric Administration (NOAA) put its August-to-October reading at +2.0°C — the second-highest figure for that time of year since records began in 1950. Only the 1997–98 event, widely regarded as the benchmark for modern El Niños, was higher at the same point. Forecasters now give the current event an 83% chance of surpassing every El Niño since 1950 before the year is out, with the Met Office warning that Britain faces a wetter and stormier autumn and early winter as a result.

Super El Niño 2026 — Quick Reference Summary

How NOAA’s New Reading Puts 2026 Second Only to 1997–98

The latest figure comes from NOAA’s Climate Prediction Center, which published its weekly update on 9 November 2026. The Relative Oceanic Niño Index, the measure the centre now uses as its principal gauge of El Niño strength, stood at +2.0°C for the August-to-October period. That makes the current event the second-strongest at this stage of the year in 76 years of records. The only event ahead of it, 1997–98, stood a tenth of a degree higher at the same point — a gap so small that NOAA notes the provisional figures can still shift for up to two months as the underlying sea-surface temperature data is filtered.

A second NOAA measure tells a similar story. The Oceanic Niño Index for August to October 2026 stood at +2.46°C, comfortably inside NOAA’s “very strong” band, which begins at +2.0°C. The weekly Niño-3.4 reading — the sea-surface temperature anomaly in the central equatorial Pacific — reached +3.3°C in the week of 4 November 2026. For comparison, the Met Office noted in August that forecast temperatures in the Niño 3.4 region were exceeding 3°C, against 1–2°C for a typical strong event. Professor Adam Scaife, who leads the Met Office’s long-range prediction work, described the developing event as unprecedented.

What “Historic” Means: The 83% Forecast and the 2.5°C Line

NOAA’s formal forecast, set out in its ENSO discussion of 8 October 2026, points towards a record. The agency defines a historic event as one whose three-month RONI reaches +2.5°C or more, a level no El Niño has reached since records began in 1950. It put the chance of that happening in October to December 2026 at 83%, and at 70% for November 2026 to January 2027. The chance of the event reaching “very strong” intensity during the November-to-January peak stands above 95%.

One point of confusion needs clearing up. “Super El Niño” is not an official NOAA category. The agency’s published strength bands stop at “very strong”, meaning a peak index of +2.0°C or above. The “super” label is a shorthand used by forecasters and the media for events at the extreme end of that scale. By either measure, the 2026–27 event already qualifies: it is very strong on NOAA’s own scale, and it is closing on the all-time record.

Wetter and Stormier: What the Met Office Expects for Britain

El Niño begins in the tropical Pacific, thousands of miles from Britain, yet its effects travel through the atmosphere and reach north-west Europe. The Met Office’s assessment, published on 21 August 2026 and echoed by scientists at the Science Media Centre, is that the event increases the chances of wetter, stormier conditions for the UK through the coming autumn and early winter. That matters now: the UK has already endured an exceptionally dry summer across Wales and England, and hard, dry soils struggle to absorb intense rainfall.

The pattern is not uniform across the country. Experts expect the north-west to be worse affected than the south-east, and the Met Office’s own guidance points to a 60% chance of above-normal rainfall in the south and west, with more Atlantic storm systems tracking across the country. The Environment Agency has flagged elevated flood risk for November and December in the south-west and Wales, based on the El Niño precipitation signal. Flooding, power cuts and damage from high winds are among the risks the British Red Cross lists for this winter.

That British picture sits alongside the polar vortex cold snap already affecting the UK this week, which The Today News covered as forecasters warned of snow and freezing conditions. The two phenomena are not the same thing, and forecasters are careful not to conflate them — but they interact, and that interaction is where the later-winter risk lies.

Storms in the South, Cold Snaps Later: The Winter Pattern Taking Shape

NOAA’s winter outlook, released on 15 October 2026, describes the typical El Niño winter pattern: a more active storm track across the southern United States, with milder, drier conditions across much of the north. For the UK, the sequence the Met Office describes runs in two phases. First comes the mild, wet and stormy autumn and early winter already under way. Later in winter, atmospheric waves linked to El Niño can travel into the stratosphere and weaken the polar vortex, raising the chance of sudden stratospheric warming events — the mechanism that can drag cold air southwards over Britain.

A Met Office spokesperson has said that through the latter part of the winter, following a peak in El Niño, the stratospheric polar vortex can become weaker, leading to an increased chance of sudden stratospheric warming events and a greater potential for cold weather. The British Red Cross summary puts it plainly: a slightly increased likelihood of cold snaps in early 2027. History offers a warning rather than a prediction. The winter of 2009–10, known as the Big Freeze and the UK’s coldest in three decades at the time, coincided with an El Niño event. Forecasters stress that El Niño alone cannot reliably predict a severe winter, and the extent, timing and location of any snowfall cannot yet be determined with confidence.

Why 2027 Could Become the Hottest Year on Record

El Niño does more than rearrange rainfall. By releasing vast amounts of heat from the Pacific into the atmosphere, it pushes global temperatures higher. Professor Amanda Maycock, Joint Chair of the Met Office Academic Partnership and Professor of Climate Dynamics at the University of Leeds, has said the additional heat from this El Niño is likely to push global temperatures even higher, raising the prospect of 2027 becoming the hottest year on record globally. The Met Office has separately said 2027 is likely to be the warmest year on record.

That global heat is already visible in the event’s own numbers. The Oceanic Niño Index has climbed through every season of 2026, from −0.21 in January to March to +1.80 for June to August — the warmest such season in 77 years. The World Meteorological Organization expects the event to reach its peak towards the end of 2026 and continue into 2027 before weakening. NOAA’s forecast keeps a strong to very strong El Niño in place through January to March 2027, with the event persisting through March to May 2027 and neutral conditions favoured only by April to June.

What Happens Next: The 12 November Update

The next hard data arrives quickly. NOAA’s Climate Prediction Center is due to publish its next monthly ENSO discussion on Thursday 12 November 2026, updating the odds of a record event. That discussion will show whether the October-to-December figure has moved closer to, or further from, the +2.5°C historic threshold — and whether the weekly readings that put the event a tenth of a degree behind 1997–98 have held up.

For the UK, the practical picture is already clear enough to act on. A wetter, stormier autumn and early winter is the forecasters’ central expectation, with flood risk elevated in the south-west and Wales, and a heightened chance of cold snaps once winter turns. The record itself may or may not fall. Either way, this El Niño is already the second-strongest in 76 years — and it has not peaked yet.

Frequently Asked Questions

Is the 2026 El Niño officially a “super El Niño”?

No — not in NOAA’s terminology. “Super El Niño” is not an official category; NOAA’s strength bands stop at “very strong”, meaning a peak index of +2.0°C or above. The 2026–27 event is already very strong on that scale, which is why forecasters and media use the “super” label. The distinction matters because the official record is judged on NOAA’s index, not on the nickname.

When will the El Niño peak?

The World Meteorological Organization expects the event to reach its peak towards the end of 2026 and continue into 2027 before weakening. NOAA forecasts a strong to very strong event through January to March 2027, persisting through March to May 2027, with neutral conditions favoured by April to June 2027.

Will the UK get snow because of El Niño?

Not necessarily, and no forecaster is predicting widespread snow from El Niño alone. The Met Office’s signal for Britain is wetter and stormier conditions in autumn and early winter, with a slightly increased risk of colder weather and cold snaps later in winter if the polar vortex weakens. The Met Office has said the current forecast does not support suggestions of the UK being “smashed” by widespread snow.

How does this El Niño compare with 1997–98?

At the same point in the year, the 2026 event is a tenth of a degree behind 1997–98 on NOAA’s Relative Oceanic Niño Index (+2.0°C against +2.1°C for August to October). NOAA gives the current event an 83% chance of exceeding every El Niño since 1950 by the end of 2026. The figures are provisional and can shift for up to two months.

When will the next official update arrive?

NOAA’s Climate Prediction Center publishes its next monthly ENSO discussion on Thursday 12 November 2026. That update will revise the odds of a historic-strength event and the latest index readings.