Pre-pandemic, Turkey was the 6th most visited country on Earth, with over 50 million tourist arrivals.
You do not need a visa to enter Portugal if you are a U.S. citizen. On the other hand, Turkey requires a tourist visa for American citizens.
Though the country isn’t large, it has enough microclimate zones to match anyone’s notion of ‘ideal’ weather. Winters are usually wet and summers are dry.
Turkey is a much larger country with climate patterns varying considerably across regions. In general, summers are hot and sunny across the board.