If we are to have a second round and I suspect we will, then August will be far better than winter for all sorts of reasons.
This lockdown would have been worse in the winter:
Even those without gardens have been able to open their windows to get some fresh air without freezing.
Queueing for supermarkets is far worse if it is cold and wet.
Hopefully most people will have at least slightly raised vitamin D levels
It won't coincide with natural flu season, which despite vaccination continues to lead to hospitalisation and death every year.
Some of the people who have broken the lockdown by, probably safely, meeting in gardens etc, will do the same, much less safely, indoors.
I think we can cope with a second wave in August far better than November onwards.
The downside is for the tourist industry in that it won't be able to (probably unwisely anyway) resurrect the second half of the season.