The Spaniard has been busy in the transfer market so far, but Seaman is wary of the difficulties Emery could face as Wenger's successor and believes that a return to the top four would make for a "great season".
"If I am honest I don't think it will click straight away because it is a new manager," Seaman is quoted as saying by The Mirror.
"It is a whole new different way of Arsenal. I am back here [at the Emirates Stadium] and I am still seeing Arsene's face everywhere. I see him in the dugout – moaning and groaning, and throwing water bottles, and struggling with his zip, stuff like that.
"So it is going to be really hard to get used to somebody else in that seat. It will take time, but I think realistically top four would be a great season for us."
Arsenal's first match of the new Premier League season comes against defending champions Manchester City on August 12.