Ex-Watford winger Berghuis harbours hopes of a "dream move", but Van der Vaart has told him to think carefully.
“I think he should stay with Feyenoord. He is the man there, the team is built around him," Van der Vaart said.
“Do you have to go to Everton when you are almost 29 or something?
"If you don't play well there twice, they will set up a clumsy Englishman and you will be out of the picture, also with Oranje [national team]."