The next three days will be very hot. The heat can bring out swarming in a hive. So make sure the entrance reducers are out and the slide is out on screen bottom boards. When it is very warm, it is normal to see bearding in front of the hive. It does not mean it is a sign of swarming. Bearding is just the bees trying to keep cool. The hive is hot so let's sit out on the porch type of thing.
Mite tests should be done on colonies soon. A beekeeper should know where they are for mite loads. Some beekeepers just treat for mites without testing. The only mite treatments that can be put on now with supers on is Mite Away Quick Strips (MAQS). Some beekeepers put one strip in for a knock down effect on the mites. Then do a full treatment of two strips in mid August. Having low mite levels is the key to bee longevity.
Hive populations should be getting big now, so get the supers on to get a big honey crop.