The location doesn't matter that much unless you mean absolutely directly above, and then the only thing that matters is how far north you are, not how east or west you are. The Big Dipper has a declination of about 50 degrees (it covers a large area so individual stars have specific angles that are close to 50 degrees north of the ecliptic, the imaginary plane that the equator is on on the first day of spring and first day of fall). What this means is that the big dipper could be overhead for anyone at about 50 degrees north, but since the earth axis is inclined about 22 degrees or so, the range of latitudes that could have big dipper right above will be from about 30 to about 70 depending on the time of year. The question is only whether that overhead location will occur at night (when we can see it) or not.
For those of us in the northern US (45-50 degrees north), it is likely that we could see the Big Dipper directly overhead in either the fall or the spring. My star ap on my phone indicates that it would be roughly overhead somewhere about 9:30 PM for me today. The local time would be the same for you unless you aren't on daylight savings time. then you need to adjust an hour.
If you could see it right now (about 9:30 AM where I am in the US Eastern Time Zone), it would be low in the sky almost directly north. You cannot see it of course because of daylight washing out the stars.