Releases don't seem to follow what you'd normally expect from a series. By that I mean, season 1 came out last summer, and then season 2 came out this winter. My guess for season 3 would be maybe this summer because that's when season 1 came out. However, maybe season 2 came out in winter, because the series has switched from summer to winter release dates??? in which case it would make sense for season 3 to come out next winter (which would be a long wait!). If you factor in filming dates, it makes sense that season 3 would come out in summer, because season 1 was filmed in winter, and season 2 in the summer which, suggests season 3 could be filming now.