This is because the shower's radiant point, or point of origin, is located near the constellation Orion which doesn't rise until after 11 p.m. local time.
For best viewing get away from city and street lights and lie on your back with your feet facing southeast if you are in the Northern Hemisphere or northeast if you are in the Southern Hemisphere.
The Orionids appear to radiate from the constellation Orion (The Hunter) but knowing that is not necessary to spot them because they stretch across the entire night sky.
Like all meteor showers, the Orionids is caused by particles of comet debris entering our atmosphere. However, stargazers may also spot "shooting stars" in the coming day, just less frequently.
Orionid meteor shower is going to peak from October 21-22 this year. Under the best of circumstances, sky watchers can see between 10 and 20 streaks per hour, though the moon might reduce visibility somewhat this year.
There are now two other active meteor showers: the Southern Taurids, which last through November 20, and the Northern Taurids until December 10. There is expected to be a bright moonrise tonight as well, which may hinder the view of meteors for some areas.
According to NASA, each time Halley returns to the inner solar system, its nucleus sheds ice and rocky dust into space. The dust grains eventually become the Orionids in October and the Eta Aquarids in May if they collide with Earth's atmosphere. Since the comet orbits the Sun, small chunks of its outer layers break and get left behind.
Halley is the only known short-period comet that is regularly visible to the naked eye from Earth, and the only naked-eye comet that might appear twice in a human lifetime. Halley's comet itself was last seen in our sky in 1986 and will reappear in 2061.
You don't even need any special equipment or a lot of skills to view a meteor shower; all you really need is a clear sky and lots of patience!