This kind of question gets "dated" fast...eg, if somebody reads it next week (or next year).
The best way to find out is visit something like fandango.com, movies.com, moviefone.com, rottentomatoes.com, movietickets.com or imdb.com as they all list what's playing (now) and what's coming soon to movie theaters :)
also, to go with what Jeremy said, movies come out at different times in different places. For example, here in texas, dallas will get movies in their theatres quicker then we will here in a smaller town. So yeah, i would check with your local movie theatre's website.
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