Supetar is a town located on the northern coast on Brač. Brač is one of two islands facing Split across the Brač Channel. The other island facing Split is Šolta. Since Supetar is on the nothern side of Brač, the town also faces Split. In fact, there is daily ferry boat link between Split and Supetar.
If you like to go to a place for vacation on Brač, you could take ferry boat ride to Supetar, then either spend holiday in Supetar or visit other little towns around Supetar, like Sutivan, Splitska, and Postira. The place has readily available holiday apartments and nice gravel and sandy beaches. Supetar is also a transit port since tourists go through it on their way to Bol and Golden Horn on the southern sunny side of Brač, Croatia.