This has been a summer for serious growth up here. I took a boat out of Conscience Pt. 2 weeks ago that had been sitting. Wouldn't come on plane, vibrated like a Motel 6 bed. Luckily she only had to fo a few miles to her winter home because I could only make 7.5 kts without shaking her apart. We typically start getting the bad growth during the last 2 weeks of August up here. This year it was more like being in So. Florida. Your diver should have you back in shape, but don't be surprised if he charges you a bit extra. He'll have a lot of scraping to do.
P.S. If the diver does good by you please PM me his info. The guy I usually recommend has retired. Thanks.