The Orionids -- so named because they appear to streak out of a point (called the radiant) in the constellation Orion -- will peak on October 21st. Sky watchers north of the equator with dark clear skies will spot 15 to 20 meteors each hour before dawn.
"Earth comes close to the orbit of Halley's Comet twice a year, once in May and again in October," explains Don Yeomans, manager of NASA's Near-Earth Object Program at the Jet Propulsion Laboratory. Although the comet itself is rarely nearby -- it's beyond the orbit of Saturn now -- Halley's dusty debris constantly moves through the inner solar system and causes the two regular meteor showers.
Link:
Orionids Meteor Shower