The salmon fishing can be very good from the end of May onwards, with the peak months being June and July, but can fish well from March until the end of September. The River Finn is a spate river and there is fantastic fishing shortly after heavy rain – which is a frequent occurrence in Ireland!!
The Mourne is not a spate river but like many other Irish rivers, it fishes best as the water fines down, but because of its size it usually fishes well for 3 or 4 days after the flood waters have receded. The Grilse will often press on unless the water is really low.