The “most difficult” fishing. The summer fishing is largely practiced in the mornings and evenings as it is susceptible to detrimental effect both from low water speed and high water temperatures. The fishing may not prove all that difficult if there is decent water speed, plenty of newly risen fish and a water temperature under 20 degrees. This is when the first fishing for the “autumnal” sea trout begins, primarily in the evenings and at night. It is not entirely unusual for the first of these fish to start wandering up the river Mörrum at the end of May.