End of day
tends to be higher after stress
exposure - if you spent a day exercising and relaxing, your BP may be lower - of if taken at the end of a stressful day it will probably be higher.
Ideal BP is 115/70-75.
Get yourself a home BP cuff if you have a problem - i would recommend the traditional type as electronic devices are not very accurate.If you have high BP in am, you should see md.