If you want nice beach, watersports and somewhere quiet at the same time – in the height if holiday season, you are going to struggle. Most places with nice beaches etc will be busy for that very reason. You may have to compromise and either stay somewhere less quiet or find somewhere nice and quiet, probably with a better standard of accomodation but outside of a beach resort, meaning some traveling to and from.
Also have you considered a villa , if accomodation us causing an issue?