JAXA DATA - Extent as at 10 Sep 2018 = 22,174,535 km2, now 259k km2 (1.2 %) below 2017, 57k (0.3%) below 2016 and lowest in the satellite record
Extent is now 905 k (4.1%) below the 2010's average.
The September interim minimum was on average on 5 Sept, 5 days before. However, this minimum was reached earlier in 2011, 2012, 2013,2014 and 2017, and could be be in as many as 10 days from now (2008, 2010).
The minimum result from average further extent loss is 22.04 million, 3rd lowest, and 0.13 million above the record low in 2012 on the 25 August. But for the very slow arctic melt this year, a new record low would have been certain.
This measure is subject to highly volatile change, and at this time especially, projections of outcomes are of little value. However, the data does tell us that currently global sea ice is extremely low, and has been for some time. The graphs are impressive.