This is a dated observing guide for one event. Check the source calendar and local conditions before making plans. A later year needs its own fresh forecast.
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A two-hour maximum, converted to your own night
The IMO calendar lists activity from July 17 to August 24 and places the maximum between 02:00 and 04:00 UTC on August 13. Keep that two-hour precision when converting it to local time. Nearby dark hours and neighboring nights remain useful when the range meets daylight or cloud.
The ZHR benchmark of 100 assumes a dark sky with the radiant overhead. It describes ideal geometry, while a real session also includes skyglow, obstruction and time spent looking away.
Swift-Tuttle dust arrives fast enough to leave trains
Perseid particles come from the stream associated with comet 109P/Swift-Tuttle and enter near 59 kilometres per second. Brighter meteors can flare or leave a faint train after the head has vanished.
The radiant lies in Perseus, but staring at it hides the longest paths. Trails farther away cross the view more nearly side-on and can stretch across a much larger angle.
Give the shower a wide field and an hour
Choose a safe dark site, settle into a reclining chair and let your eyes adapt before judging the shower. Binoculars narrow the field too much for meteors that can appear almost anywhere.
Record a bright meteor’s direction before its train drifts. Color varies with brightness and vision, so keep a quick color impression as a note rather than a precise measurement.