Wenger's men will go another season without a Premier League title after faltering in 2014, although they are set for a fourth-placed finish ahead of Everton.
|2/7||Arsenal are 2/7 with Bet365 to beat West Brom in their next fixture|
Wenger concedes Arsenal need to strengthen in order to claim their first league title since the 2003-04 season but he believes the World Cup in Brazil, which kicks off in June, could hamper his transfer activity - though the Frenchman does not think major additions are necessary.
"It will be busy, but the main thing for us will be to keep the stability because we feel we are close," Wenger told reporters. "We want to add something that makes us even stronger, but, number wise, it will not be massive.
"From my experience, the World Cup years have always been very quiet until the end of the World Cup, with no players reachable.
"Everybody is focused in the country on their national team and there's not a lot happening. People are away.
"I believe this year again you will have to wait until July 15 to start going.
"You are not the only one who decides when the business is done because it's down to availability of players and the clubs who sell decide that."
Arsenal are keen to secure two early signings this summer, with Real Sociedad's Antoine Griezmann and Schalke's Julian Draxler both on the club's shortlist.