The Cottagers travel to Carrow Road on Saturday with their opponents on a winless run of nine matches.
"Norwich had a very good spell after the first seven or eight games. We started very well, then they had a very good period where they were awesome," Jol told reporters.
"Then, of course, they haven't had the best of spells over the last eight, nine games so maybe it's a good time to play them."
Thirteenth-placed Fulham currently lead Norwich in the table on goal difference.