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icon for Will there be a Super El Niño this winter (2026–27)?

Will there be a Super El Niño this winter (2026–27)?

icon for Will there be a Super El Niño this winter (2026–27)?

Will there be a Super El Niño this winter (2026–27)?

92% chance
Polymarket
NEW
92% chance
Polymarket
NEW
This market will resolve "Yes" if NOAA's Climate Prediction Center reports a Regional Ocean Niño Index (RONI) value of +2.0°C or higher for any of the following seasons: ASO 2026, SON 2026, OND 2026, NDJ 2026-27, or DJF 2026-27, as reported in official NOAA CPC RONI updates, https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso/roni/. Otherwise, this market will resolve "No". A Super El Niño is an El Niño event in which RONI reaches this threshold for at least one overlapping ENSO season. An ENSO season is one of NOAA's standard overlapping 3-month periods (e.g., ASO, SON, OND, NDJ, DJF). This market may resolve "Yes" immediately upon NOAA's first publication of a qualifying RONI value for any listed season. If no season has qualified, this market will not resolve "No" until NOAA publishes the DJF 2026-27 value since DJF captures El Niño's typical peak-strength window and an earlier "No" could contradict the final published data. The first published RONI value for each listed season is final and governs this market's resolution; no subsequent revision to any season's value will be considered or will change the outcome once that season's first value has been published.Official NOAA and IRI outlooks, backed by multi-model ensembles, show over 90% probability of a very strong El Niño (Niño 3.4 sea surface temperature anomalies reaching or exceeding +2.0°C) during October–December 2026 and into winter, driven by already elevated equatorial Pacific anomalies near +1.8–1.9°C and strengthening subsurface warmth. This consensus reflects exceptional model agreement on intensification through late 2026, with some runs projecting peaks rivaling or surpassing the 2015–16 record. Trader sentiment aligns closely because these forecasts carry high confidence from coupled ocean-atmosphere observations and reduced spring predictability barrier uncertainty. However, rapid weakening before peak or shifts in index definitions (such as RONI thresholds) remain low-probability but plausible alternatives that could alter resolution.

This market will resolve "Yes" if NOAA's Climate Prediction Center reports a Regional Ocean Niño Index (RONI) value of +2.0°C or higher for any of the following seasons: ASO 2026, SON 2026, OND 2026, NDJ 2026-27, or DJF 2026-27, as reported in official NOAA CPC RONI updates, https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso/roni/. Otherwise, this market will resolve "No".

A Super El Niño is an El Niño event in which RONI reaches this threshold for at least one overlapping ENSO season. An ENSO season is one of NOAA's standard overlapping 3-month periods (e.g., ASO, SON, OND, NDJ, DJF).

This market may resolve "Yes" immediately upon NOAA's first publication of a qualifying RONI value for any listed season. If no season has qualified, this market will not resolve "No" until NOAA publishes the DJF 2026-27 value since DJF captures El Niño's typical peak-strength window and an earlier "No" could contradict the final published data.

The first published RONI value for each listed season is final and governs this market's resolution; no subsequent revision to any season's value will be considered or will change the outcome once that season's first value has been published.This market will resolve "Yes" if NOAA's Climate Prediction Center reports a Regional Ocean Niño Index (RONI) value of +2.0°C or higher for any of the following seasons: ASO 2026, SON 2026, OND 2026, NDJ 2026-27, or DJF 2026-27, as reported in official NOAA CPC RONI updates, https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso/roni/. Otherwise, this market will resolve "No". A Super El Niño is an El Niño event in which RONI reaches this threshold for at least one overlapping ENSO season. An ENSO season is one of NOAA's standard overlapping 3-month periods (e.g., ASO, SON, OND, NDJ, DJF). This market may resolve "Yes" immediately upon NOAA's first publication of a qualifying RONI value for any listed season. If no season has qualified, this market will not resolve "No" until NOAA publishes the DJF 2026-27 value since DJF captures El Niño's typical peak-strength window and an earlier "No" could contradict the final published data. The first published RONI value for each listed season is final and governs this market's resolution; no subsequent revision to any season's value will be considered or will change the outcome once that season's first value has been published.
Volume
$7,666
End Date
Apr 1, 2027
Market Opened
Jul 24, 2026, 12:34 PM ET

Resolver

0x65070BE91...
This market will resolve "Yes" if NOAA's Climate Prediction Center reports a Regional Ocean Niño Index (RONI) value of +2.0°C or higher for any of the following seasons: ASO 2026, SON 2026, OND 2026, NDJ 2026-27, or DJF 2026-27, as reported in official NOAA CPC RONI updates, https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso/roni/. Otherwise, this market will resolve "No". A Super El Niño is an El Niño event in which RONI reaches this threshold for at least one overlapping ENSO season. An ENSO season is one of NOAA's standard overlapping 3-month periods (e.g., ASO, SON, OND, NDJ, DJF). This market may resolve "Yes" immediately upon NOAA's first publication of a qualifying RONI value for any listed season. If no season has qualified, this market will not resolve "No" until NOAA publishes the DJF 2026-27 value since DJF captures El Niño's typical peak-strength window and an earlier "No" could contradict the final published data. The first published RONI value for each listed season is final and governs this market's resolution; no subsequent revision to any season's value will be considered or will change the outcome once that season's first value has been published.Official NOAA and IRI outlooks, backed by multi-model ensembles, show over 90% probability of a very strong El Niño (Niño 3.4 sea surface temperature anomalies reaching or exceeding +2.0°C) during October–December 2026 and into winter, driven by already elevated equatorial Pacific anomalies near +1.8–1.9°C and strengthening subsurface warmth. This consensus reflects exceptional model agreement on intensification through late 2026, with some runs projecting peaks rivaling or surpassing the 2015–16 record. Trader sentiment aligns closely because these forecasts carry high confidence from coupled ocean-atmosphere observations and reduced spring predictability barrier uncertainty. However, rapid weakening before peak or shifts in index definitions (such as RONI thresholds) remain low-probability but plausible alternatives that could alter resolution.

This market will resolve "Yes" if NOAA's Climate Prediction Center reports a Regional Ocean Niño Index (RONI) value of +2.0°C or higher for any of the following seasons: ASO 2026, SON 2026, OND 2026, NDJ 2026-27, or DJF 2026-27, as reported in official NOAA CPC RONI updates, https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso/roni/. Otherwise, this market will resolve "No".

A Super El Niño is an El Niño event in which RONI reaches this threshold for at least one overlapping ENSO season. An ENSO season is one of NOAA's standard overlapping 3-month periods (e.g., ASO, SON, OND, NDJ, DJF).

This market may resolve "Yes" immediately upon NOAA's first publication of a qualifying RONI value for any listed season. If no season has qualified, this market will not resolve "No" until NOAA publishes the DJF 2026-27 value since DJF captures El Niño's typical peak-strength window and an earlier "No" could contradict the final published data.

The first published RONI value for each listed season is final and governs this market's resolution; no subsequent revision to any season's value will be considered or will change the outcome once that season's first value has been published.This market will resolve "Yes" if NOAA's Climate Prediction Center reports a Regional Ocean Niño Index (RONI) value of +2.0°C or higher for any of the following seasons: ASO 2026, SON 2026, OND 2026, NDJ 2026-27, or DJF 2026-27, as reported in official NOAA CPC RONI updates, https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso/roni/. Otherwise, this market will resolve "No". A Super El Niño is an El Niño event in which RONI reaches this threshold for at least one overlapping ENSO season. An ENSO season is one of NOAA's standard overlapping 3-month periods (e.g., ASO, SON, OND, NDJ, DJF). This market may resolve "Yes" immediately upon NOAA's first publication of a qualifying RONI value for any listed season. If no season has qualified, this market will not resolve "No" until NOAA publishes the DJF 2026-27 value since DJF captures El Niño's typical peak-strength window and an earlier "No" could contradict the final published data. The first published RONI value for each listed season is final and governs this market's resolution; no subsequent revision to any season's value will be considered or will change the outcome once that season's first value has been published.
Volume
$7,666
End Date
Apr 1, 2027
Market Opened
Jul 24, 2026, 12:34 PM ET

Resolver

0x65070BE91...

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Frequently Asked Questions

"Will there be a Super El Niño this winter (2026–27)?" is a prediction market on Polymarket where traders buy and sell "Yes" or "No" shares based on whether they believe this event will happen. The current crowd-sourced probability is 92% for "Yes." For example, if "Yes" is priced at 92¢, the market collectively assigns a 92% chance that this event will occur. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

"Will there be a Super El Niño this winter (2026–27)?" is a newly created market on Polymarket, launched on Jul 24, 2026. As an early market, this is your opportunity to be among the first traders to set the odds and establish the market's initial price signals. You can also bookmark this page to track volume and trading activity as the market gains traction over time.

To trade on "Will there be a Super El Niño this winter (2026–27)?," simply choose whether you believe the answer is "Yes" or "No." Each side has a current price that reflects the market's implied probability. Enter your amount and click "Trade." If you buy "Yes" shares and the outcome resolves as "Yes," each share pays out $1. If it resolves as "No," your "Yes" shares pay $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current probability for "Will there be a Super El Niño this winter (2026–27)?" is 92% for "Yes." This means the Polymarket crowd currently believes there is a 92% chance that this event will occur. These odds update in real-time based on actual trades, providing a continuously updated signal of what the market expects to happen.

The resolution rules for "Will there be a Super El Niño this winter (2026–27)?" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.