I actually get summer blues too in a way. I'm personally glad the weather's starting to get colder here. As much as it can anyways, California's still on fire lol but yeah it's been getting better. I'm much more productive in the winter so I'm hyped for more writing soon~
I tend to sleep in a lot during the day in the summer to avoid having to feel the heat. I basically started hibernating in the last few years. If that's not enough, I'll take cold showers and sometimes I intentionally soak the shirt I wear in water when I'm at home to combat the heat if I feel super productive. But of course, that's enough to get me sick. So there's times where I have to tend to the occasional flu too.
My friends usually go out and do stuff around this time, and I usually kinda have to suffer with hating the conditions surrounding the season. Which kinda hinders me from being able to do anything with them for long. Usually just playing video games distracts me from the feeling? I'm not gonna say it improves my overall mood, but it helps. It's not much, but it gets the job done lol the closest I get to winter blues is heightened depression and anxiety around the holidays, but the solution's pretty much the same for me then. I'm a simple guy to calm down, I guess xD