It is time to stop waiting and feed the bees if they need feeding. The weather is starting to cool as we move into fall. As the temperatures fall so will the ability to add winter stores to a colony of bees.
Colder weather also cools down the syrup on a hive. Bees don't like cold syrup and are reluctant to take it down. The bees also need time to turn 2:1 sugar water to honey and dehumidify the sugar syrup.
A colony needs about 9 frames of honey in the top box and around 4 frames of honey in the box under that for proper winter stores.