Alaska Climate Research Center

The Alaska State Climate Center
The Alaska State Climate Center
The Alaska State Climate Center

Arctic Sea Ice Extent: June 26, 2025

June 26, 2025: The  Arctic sea ice has experienced a bit lesser decrease for this week of 5.15% (last week’s decrease rate was 5.64%), from the level on 06/19/2025 of 10.218 M km2 to 9.692 M km2 for this week.  The sea ice extent for 2025 to date is still in first place for the lowest sea ice extent for this time of year since 2016, which was at 9.741 M km2 on 6/26/2016.

Plot Compiled by: Howard J. Diamond, PhD; Climate Science Program Manager at NOAA’s Air Resources Laboratory
Data Source: National Snow & Ice Data Center (NSIDC; https://nsidc.org/).

The negative sea ice anomaly this week was higher than the anomaly of -0.9166 M km2 on 06/19/2025 to a lesser negative anomaly of -0.8984 M km2 on 06/26/2025, and so less anomalously negative for this time of year. 

Plot Compiled by: Howard J. Diamond, PhD; Climate Science Program Manager at NOAA’s Air Resources Laboratory
Data Source: National Snow & Ice Data Center (NSIDC; https://nsidc.org/).