Waters

Lough Derg (Shannon)

Not curated yet

Co. Tipperary / Clare / Galway · Lough · wild · 13k ha

This week

Draft outlook
Today
Tmrw
Wed
Thu
Fri
Sat
Sun

Forecast-based, not a promise — and always check season dates with the fishery (link below).

Depth character (estimated)
Mixed depths · to ~36 m
Water clarity (estimated)
Clear
Exposure (estimated)
Moderate
Species
Brown trout →Atlantic salmon →

Getting there

Bank access: LimitedThere are many public harbour access points, but effective trout fly fishing is predominantly boat-based because productive water is localised and the lake is very large.
Boats available

Features

Drop offsShallowsDeep basinsShoalsWeed bedsBaysIslandsRocky shorelinePointsRiver mouthsChannels
Weed: ModerateWeed is concentrated mainly in shallow bays and margins rather than uniformly across the lake. The main basin includes extensive open and deep water.
Coarse fry present (Roach, Perch, Pollan, Brown trout)

Local notes

The best-confirmed trout water is the middle lake: Dromineer Bay, Youghal Bay and Luska (all Tipperary/eastern shore, near the lake's widest transect) are the repeatedly named first-hatch mayfly areas, with IFI angling reports also supporting Scarriff Bay and the Mountshannon sector opposite. Trout fishing has been markedly weaker at both ends of the lake since 1980s eutrophication — Killaloe–Ballina is the established coarse-fishing centre — so treat Portumna and Killaloe as mixed water rather than trout drifts. Mayfly begins in the sheltered shallow bays in late April and spreads lake-wide through May; fish controlled drifts across shallow-to-deep transitions and island margins, with calmer spent-gnat periods favouring dry fly. Derg also holds the Croneen — a genetically distinct, silvery migratory brown trout that runs the Camcor/Little Brosna system to spawn in autumn and returns to the lake to feed.

Fishery rules & regulationsFish here now