The goals were scored by Pepe and Raul Meireles in the second half, but the Portuguese also hit the woodwork three times and had another goal disallowed in the first period for offside.
Portugal, many people’s pre-tournament favourites after reaching the Euro 2004 Final and the semifinals of the 2006 World Cup, took some time to get into their stride, but when they did, the cut the Turks apart at will.
After Pepe had seen an earlier headed goal correctly ruled out for offside, he netted in the second period after a lovely one-two had put him into space with just the goalkeeper to beat.
Turkey had a few half-chances to equalise, but it would have been a travesty of Portugal had not taken full points and they netted a second, decisive goal in injury time at the end of the game when Meireles scored his first international goal to seal the win.
Portugal top Group A on goal difference from the Czech Republic, who earlier in the day defeated co-hosts Switzerland 1-0 in Basel.