Inland Fisheries Ireland(IFI) has reopened the Erriff and Moy fisheries in Co. Mayo, and the Galway Fishery in Galway city.
The three State-owned fisheries had been closed due to high water temperatures.
IFI closed the fisheries so that cold water fish species did not suffer potentially lethal angling-related stress, in addition to stress caused by water temperatures above 20 degrees.
Multiple temperature readings below 18 degrees have since been recorded at the Moy, at the Erriff River, and at the Galway Fishery on the River Corrib.
Barry Fox, IFI’s Head of Operations said: “The suspension of angling at the Moy, Erriff and Galway fisheries is now lifted.
“Water temperatures have returned to an appropriate range, and the fisheries can be re-opened.
“IFI will continue to monitor all fisheries it manages for the State.”
The IFI is reminding anglers that they must be in possession of a salmon and sea trout licence before fishing for these species.