Most of these bears are close enough to shore to hit the beach if that’s where they wanted to be but they’re on the sea ice.
I’ve been posting these USGS tracking maps for two years.1 The map archive at USGS goes back to December 2009. Seeing all animals on the ice in July is usual for Southern Beaufort polar bears.
During August, a few of these females usually come ashore (see here and here), probably because they plan to den there later. But most polar bear females stay out on the ice, no matter how far it contracts into the Arctic Basin. Only about 5% of SB bears spend time on land during the summer.
See the July track map below and some sea ice maps and graphs for the region.