You are in the south-east and it's bleeding hot and humid - so expect to see more bees outside. With all this humid hot weather - don't open the hive
Orientation is most likely and most obvious in the afternoon with bees running around the landing board and up the front of the hive before launching off and flying in front of the hive - it's happening on one of my hives right now at 1738hrs. It's usually a frenzy for less than an hour and dies down as quickly as it starts.
Robbers are around the hive looking to get in anywhere but the front door. Then they get bold and fly straight at the front trying to con their way past the bouncers ( your guard bees). No landing in front and waiting to be inspected. When robbing is well underway the robbers can become accepted and the guard bees don't recognise them as robbers.
Flight paths can be telling, are they flying across to other hives or in/out and away as you would expect?
You mentioned wasps and I'll now chuck in hornets because they are now out in increasing numbers ( you will of course look out for asian hornets hawking in front of the hive). European hornets tend to come in to the landing board and snatch bees.
Watch carefully, if wasps are getting in past the guards you need to restrict the entrance, if needed right down, but you can try a small sheet of perspex lent up at angle in front of the entrance. The bees quickly learn to go round but the wasps are confused especially if there are small air holes in the perspex right in front of the entrance opening.
The most obvious sign of robbing is fighting on the landing board but note what I said about accepted robbers.
If it is a strong colony and you can see guard bees coming out on the landing board to challenge bees, often coming out and turning to face the hive before coming back to the entrance then that is an active guard force and they will see off robbers and wasps (some will always get past). If what you are looking at is a short duration frenzy as I described (at 1826hrs all is normal) then it is more likely to be orientation