I don't know how to judge the skimmer flow. I only know there is plenty of suction from the skimmer to the pump.
Scatter some baby powder on the water in a 3 foot area around the skimmer. If the skimmer and weir are working properly, it will be drawn into the skimmer in about a 1 foot half circle around the skimmer throat. Doing this will also let you see what's happening with respect to the currents in your pool.