Lot of honey in collection trough. Normal?

We had a very nice nectar flow in March and April, before I got my nucs. The nucs arrived at the end of April, and the flow has gradually dried up since then. They are still finding nectar, and I haven’t had to feed, but I can’t imagine that we will be able to harvest this year. I would rather build up a healthy, strong hive and get them off to a fast start in time for the flow next year.