October 2, 2025: The Arctic sea ice has experienced a larger increase rate for this week of 8.96% (last week’s increase rate was 2.68%), from the level on 09/25/2025 of 4.817 M km² to 5.291 M km² for this week.  The sea ice extent for 2025 to date has now risen one more spot to 9th place for the lowest sea ice extent for this day of the year as noted below when the lowest sea ice extent was at 4.138 M km² on 10/02/2012.

Ranking of lowest sea ice extent for the day of the post, values in M km² :

2012 4.138
2020 4.479
2007 4.658
2024 4.763
2023 4.857
2019 4.881
2018 5.038
2011 5.180
2025 5.291

The negative sea ice anomaly this week was less than the anomaly of -0.91083 M km² on 09/25/2025 to a lower negative anomaly of -0.88801  M km² on 10/02/2025, and so more anomalously negative for this time of year.