Want to know if it's worth leaving the warmth and comfort of your bed? Will the fish be biting? Take advice from John Turton's ANGLERS MANUAL OF 1837.
IMPROPER TIMES TO ANGLE.
It is of little use to angle with the long line under a scorching sun, in the middle of the day, during the summer months. It is almost always bad angling in a cold east or north wind, especially in the spring or fall of the year. It is never good fishing when " snow-broth" is in the rivers.
Large fish will rarely or never feed the day after a dark or a windy night; for in those nights they glut themselves, and will not soon feed afterwards. It is of little use fishing in very long droughts, when the rivers are very low, the water dead, and full of fine green weed, vulgarly called « croggil," which adheres to the knots of the lash, clogs the hooks, and covers the flies, so that no fish can take them, and is quite troublesome to the angler. It is commonly bad fishing whilst the mill next above you stands still, and there is no stream running. It is of little use, in most instances, to fish with the fly, when the wind is very high; chub, roach, and dace never rise when there are great waves on the water.