Looking to go to Tinos next summer in June. Trying to find out if there are boat tours in the area (like the type where you hire the boat and skipper for the day to get access to small, out of the way beaches, etc.) but all I can find are yacht hires. I'm looking for something much lower key (and less expensive) but haven't had any luck online. Anyone have any suggestions?
I would be surprised if Tinos had the kind of thing you want, because it's not the normal "touristic" type of island -- in May-June, mainly Greeks, some Europeans -- and later in the summer it's the big religious draw. So I wonder if it could support the kind of skipper-hire thing you envision ... likelier in Paros, Naxos, Antiparos.
Have you tried Vincenzo Travel? They advertise that they rent boats.
http://www.vincenzotravel.com/en-contactus.html
If you are not fixed on Tinos then Andros, the next island up, has boat hire.
https://www.e-kyklades.gr/showroom/tourism/RIVA_ANDROS?lang=en
Alan