A few weeks ago I posted a thread about whether it was good to go early in the morning in the summer to fish the local lake and the general concensus was - yes. So I've been 2 times, getting there for 5.50-6.00am on a 4h ticket. The first time there had been a warmish night and lots of fish were rising but they were only interested in one fly, what I believe was a yellow mayfly dun, for which I didn't have a decent fly with me to use! Second time it had been a relatively cold night ~ 9oC by the time I got fishing and a cool day in prospect. Few fish rising and no flies hatching. It was only a couple of days after the weed had been cut and the water was still cloudy, and I suspect the fish may have either gorged themselves whilst the cutting was taking place or still not feeding after the disturbance. I caught nothing on dry fly and finally caught one fish on a suspender buzzer. No one else was catching much either. So, are there some good guidelines for the best days to go fishing? Is a cold night bad news? or than better in the day/evening? Is a warm night with the promise of a warm day better for fly hatches and catching early on? It costs me £30 each time I go so I want to make sure I stand a decent chance of catching.