August bank fishing is generally thought of as being poor.
With high water temperatures it can be extremely difficult.
Evenings are generally dead, mornings are inconsistent and unless cloud cover makes the fish restless, they refuse to come anywhere near the angler during the day.
It is possible to catch fish, but you have to pull out the stops, and accept the consolation that its pretty damn hard in the boats to boot.
The only way to consistently catch fish during August is to get afloat. Apart from days offering favourable weather conditions, it is often the last half-hour of light, which provides the bulk of the sport.
Naturally most other boats have long since packed up and gone.