The Pro Bowler has missed the last two games and was hoping to be ready coming out of the off week. He practiced in full gear all week but said he still feels pain when he plants on the foot.
"I've been out the last couple of days running on it, testing it," Winfield said on Friday. "It's good going forward but I still have a little problem cutting. But I would say next week I should be OK."
The Vikings (7-1) host Seattle next week. Winfield said he doesn't want to rush back and risk further injury that would keep him out longer.
"A lot of guys try and come back from injuries real early and something else happens," Winfield said. "Hopefully we won't do that."
He said sitting has been easier with the Vikings winning. The Vikings have already built a comfortable lead over Green Bay and Chicago in the NFC North.
Receiver Bernard Berrian is listed as questionable with a hamstring injury. Quarterback Brett Favre (groin), linebacker E.J. Henderson (knee), backup linebacker Jasper Brinkley (hamstring) and punt returner Darius Reynaud (hamstring) are all listed as probable.