Dowell has barely featured for Everton this season, with just two appearances to his name.
And Silva admits that he needs to have a discussion with Dowell over where his future lies, ahead of the January transfer window.
“We believe in him, we renewed his contract and he has really good quality,” Silva said.
“Of course, he's played in the two Carabao Cup games but he hasn't had a big chance in the Premier League but now is not the moment to decide something.
“When the moment arrives I will sit with the player, I will talk with him but you never know what will happen between now and January.”
The England youth international scored in Everton’s friendly over Gor Mahia in midweek to increase his reputation.
The problem for Dowell is that Everton have been in good form, meaning his chances of breaking into Silva’s starting line-up any time soon are limited.
Dowell is directly in competition with Gylfi Sigurdsson for a place in Everton’s team, and the Icelandic international has been one of the Toffees’ star players this term.
Everton are next in action at the weekend when they take on Chelsea at Stamford Bridge.