Low engagement during summer?

I don't know if it's only my account, but since June I don't see the same engagement than May. I was at 100 new follower a day in May and now I'm at 50/day. I'm still using the same follow/unfollow on non-follower. My content is still the same hasn't change.

Anyone else notice a lower engagement recently (even worst in August).

I can assure you seasons have nothing to do with engagement hits. There are so many factors of why your accounts has this change. We can only guess. Continue on what you are doing.