Trader consensus on Polymarket strongly favors a maximum Arctic sea ice extent of 14.2-14.4 million square kilometers this winter (94.5% implied probability), driven by sluggish ice growth observed this fall amid persistent warm air temperature anomalies over the Arctic Ocean, as reported by the National Snow and Ice Data Center (NSIDC). November 2024 extent ranked second-lowest on record, with refreezing lagging multi-decadal averages due to neutral ENSO conditions and a weak negative Arctic Oscillation pattern limiting ice export. Seasonal model ensembles from NOAA and ECMWF converge on this lower range, consistent with the post-2012 trend of winter maxima below 15 million sq km. Upside risks include a strengthening La Niña shift or positive Arctic Oscillation fostering greater ice retention, with new NSIDC updates and forecast runs expected weekly through the March peak.
Experimental AI-generated summary referencing Polymarket data · UpdatedMax Arctic sea ice extent this winter?
Max Arctic sea ice extent this winter?
14.2-14.4m sq km 95%
<14m sq km 2.1%
14.4-14.6m sq km 2.0%
14.8-15m sq km 1.4%
$28,509 Vol.
$28,509 Vol.

<14m sq km
2%

14-14.2m sq km
1%

14.2-14.4m sq km
95%

14.4-14.6m sq km
2%

14.6-14.8m sq km
1%

14.8-15m sq km
1%

15m+ sq km
1%
14.2-14.4m sq km 95%
<14m sq km 2.1%
14.4-14.6m sq km 2.0%
14.8-15m sq km 1.4%
$28,509 Vol.
$28,509 Vol.

<14m sq km
2%

14-14.2m sq km
1%

14.2-14.4m sq km
95%

14.4-14.6m sq km
2%

14.6-14.8m sq km
1%

14.8-15m sq km
1%

15m+ sq km
1%
This market will remain open until data has been published for April 1, 2026, at which point it will resolve immediately. Any revisions to sea ice extent recorded after data is published for April 1, 2026 will not be considered.
The resolution source for this market measures Arctic sea ice extent to thousands of square kilometers (e.g. 14.255 million sq km). Thus, this is the level of precision that will be used when resolving the market.
The resolution source for this market will be information from the National Snow and Ice Data Center, specifically the maximum value recorded for any day between November 20, 2025 and April 1, 2026 in the “NH-Daily-Extent” tab of the “Sea Ice Index Daily Extent” data set, available at https://nsidc.org/sea-ice-today/sea-ice-tools. If this resolution source becomes unavailable, another resolution source will be chosen.
Market Opened: Nov 20, 2025, 6:43 PM ET
Resolver
0x2F5e3684c...Resolver
0x2F5e3684c...Trader consensus on Polymarket strongly favors a maximum Arctic sea ice extent of 14.2-14.4 million square kilometers this winter (94.5% implied probability), driven by sluggish ice growth observed this fall amid persistent warm air temperature anomalies over the Arctic Ocean, as reported by the National Snow and Ice Data Center (NSIDC). November 2024 extent ranked second-lowest on record, with refreezing lagging multi-decadal averages due to neutral ENSO conditions and a weak negative Arctic Oscillation pattern limiting ice export. Seasonal model ensembles from NOAA and ECMWF converge on this lower range, consistent with the post-2012 trend of winter maxima below 15 million sq km. Upside risks include a strengthening La Niña shift or positive Arctic Oscillation fostering greater ice retention, with new NSIDC updates and forecast runs expected weekly through the March peak.
Experimental AI-generated summary referencing Polymarket data · Updated


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