The sea ice in the Arctic is at maximum extent in February and retreats through to mid September.
This movie shows the Arctic sea ice extent from 1 Feb to 25 July 2017. The data come from the DMSP SMMI sensor, and it shows the retreat of the sea ice as summer progresses.
You can see from the NSDIC that Arctic sea ice extent is tracking close to the 2012 minimum, and about ~1.6 million km2 below 1981-2010 median.
To see where the sea ice "isn't" you can see the gif I made for a post last week.
In that post I said
Things that stand out for me are the virtually open water in the Barents and Kara Seas.
~6-8 weeks of melt to go...
Today the NASA Earth Observatory Website has published a beautiful image from 29 June 2017 of Hudson Bay in a post called Lingering Sea Ice on Hudson Bay.
To the untrained eye the sea ice in the bay looks like cloud, but if you look at the still from the movie above on the same day, the sea ice is clear.
The NASA blog post talks about how polar bears were hunting in this sea ice.