Alaska Climate Research Center

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

Arctic Sea Ice Extent: June 19, 2025

June 19, 2025: The  Arctic sea ice has experienced a greater decrease for this week of 5.64% (last week’s decrease rate was 4.75%), from the level on 06/12/2025 of 10.829 M km2 to 10.218 M km2 for this week. The sea ice extent is currently at record low levels for this time of year, beating the previous negative record of 10.301 M km2 on 6/19/2016.

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 -0.7613 M km2 on 06/12/2025 to a greater negative anomaly of -0.9166 M km2 on 06/19/2025, and so more 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/).