According the the producers of Game of Thrones the start of the 7th season of GoT will be slightly delayed. Winter has arrived in Westoros but not yet in Scotland and Ireland where filming will be taking place. Since winter has arrive on the show, the majority of locations will need to look appropriate. There won't much green grass and blue water going forward on the show. One of the things that makes Got so amazing is the cinematography. They could just use CGI for these scenes but first, it won't look as good in most cases and second they will already be spending a large amount of special effect these last two seasons for other parts of the show.
