Porto's third Super Cup win in a row followed a hugely successful season in which they won the league title, Europa League and Portuguese Cup before Andre Villas-Boas moved to Chelsea and his assistant Pereira was promoted to head coach.
Rolando gave Porto a flying start, heading in after three minutes from a delightful cross by Brazilian forward Hulk.
Guimaraes, who lost the Portuguese Cup final 6-2 to Porto in May, levelled in the 32nd minute when striker Marcelo Toscano headed in unmarked from a corner by winger Targino.
Porto restored their lead, again thanks to Rolando who fired in from close-range in the 40th minute following Hulk's free-kick.
The Portuguese champions' next final is likely to be a tougher test when they face European champions Barcelona in the European Super Cup in Monaco on August 26.
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