Bottom line: You can find the Big Dipper and Little Dipper in northern skies any time of year. The North Star, Polaris, is located at the end of the Little Dipper's handle.
Where is the Big Dipper right now?
Tonight, if you can find the Big Dipper in the northern sky, you can find the North Star, Polaris. The Big Dipper is low in the northeast sky at nightfall, but it'll climb upward during the evening hours, to reach its high point for the night in the wee hours after midnight.
Does the Big Dipper exist?
The Big Dipper is an asterism in the constellation Ursa Major (the Great Bear). One of the most familiar star shapes in the northern sky, it is a useful navigation tool.