I cancelled a day trip to Galveston earlier this month after researching the seaweed. It was bad the last 2 years, but everyone was saying this is the worst they've ever seen. Those picutres above are very helpful.
However.... when I went to Galveston 2 years ago, I was shocked at how bad and gross the seaweed was. But guess what, my elementary age kids didn't even notice it. We cleared an area so they had some sand to dig in, and they had fun in that spot and in the nasty, disgusting, murky water.
This seaweed sucks. I love Galveston otherwise.