Check the oil level when the engine is cold and the car parked on a level base. If the oil level is materially higher than the "max" marking you must drain some oil out by releasing the oil drain nut in the sump for a short time (and catching the oil in a container!) unless you have access to a siphon facility to use via the dipstick. If the oil level is correct, it could be the normal water condensation evaporating to steam that you see, especially in colder weather. But this should diminish/disappear when the engine is at working temperature.
You should not keep running the engine when the oil level is showing materially above the max as other problems are likely to occur ie crankshaft seals starting to leak oil, that are costly to fix.