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Antarctic Sea Ice Hits Third-Lowest Peak in 2025

10/2/2025

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Summary

Story summary

Antarctic winter sea ice peaked at 17.81 million km² on September 17, 2025, the third-smallest.
The National Snow and Ice Data Center notes all 19 lowest Antarctic extents occurred in the last 19 years.
In 2025, Antarctic summer minimum was 1.98 million km².
NSIDC is transitioning to new satellite data sources due to prior data-access issues.

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Story summary

Antarctic winter sea ice peaked at 17.81 million km² on September 17, 2025, the third-smallest.
The National Snow and Ice Data Center notes all 19 lowest Antarctic extents occurred in the last 19 years.
In 2025, Antarctic summer minimum was 1.98 million km².
NSIDC is transitioning to new satellite data sources due to prior data-access issues.