Nobody here knows for sure. There was wild speculation that we would see it in the Spring and this didn't happen. So it comes as no surprise, that analysts have avoided speculating about a release happening in the summer. Awhile back, Tim Cook made an ambiguous statement about exciting products being announced in the Fall. As a result, many are speculating we will (at the very least) see the new iPad 5 released sometime this Fall. That is a very wide window and it could still be released at any time in the near future until right before Christmas...
If you can't afford to be without it for more than a month, than you probably should hang onto it until after they are officially announced. Apple doesn't always offer their new products immediately for sale and sometimes there is a short delay between the announcement and before the product actually hits shelves.