I am going to put the cat amongst the pigeons here! I inspect every seven days if the weather allows, I sometimes alter that to between 6 and 10 days if the weather is likely to be better within that timespan but...... If the weather is crap I leave them to it! I have found that bees rarely swarm when the weather is terrible, cold or windy, in fact they swarm more on hot humid days. If I lose the odd swarm as a result of this lack of inspection then I usually get it back although not always. I will always go straight into the swarmed hive and sort out queen cells to try and stop casts and am usually successful.
I find that bees will often tear down queen cells if the weather is useless for swarming. They seem to know best to me! If I go in on bad days it makes them cross for ages afterwards and I don't need that. I don't keep bees for a living just for 'enough' honey so the rigid seven day rule isn't that important to me.
It's up to you but I like happy bees and if that means the odd swarm then hey who Am I to argue.
Each to their own!!!
E
