Lough Derg (Shannon)
Baseline tacticsCo. Tipperary / Clare / Galway · Lough · wild · 13k ha
Weather check
Issued 08:37| Time | Sky | Wind | Air | Rain |
|---|---|---|---|---|
| 06:00 | cloud | N 6 km/h | 0 °C | dry |
| 08:00 | cloud | N 7 km/h | 1 °C | dry |
| 10:00 | cloud | NE 5 km/h | 3 °C | dry |
| 12:00 | cloud | N 5 km/h | 5 °C | dry |
| 14:00 | sun and cloud | NNE 6 km/h | 8 °C | dry |
| 16:00 | cloud | E 6 km/h | 9 °C | dry |
| 18:00 | cloud | S 3 km/h | 6 °C | dry |
| 20:00 | cloud | E 4 km/h | 5 °C | dry |
Times are UTC · wind in km/h · sun and rain read left to right across the day.
- Air
- -1–9°
- Wind
- 7 km/h
- Rain
- Dry
Water
estimatedCool ≈ 8–12
Steady sport — the fish will come up for it.
From recent air temperatures and the season. Got a thermometer? Tell us
Ripple on the forecast.
Today · Lough Derg (Shannon)
Best window today is dawn, around 08:18.
Water · Cool (8–12°C)Fishability is the engine's own hourly score. Why these conditions matter.
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Check season dates with the fishery (link below).
Getting there
Features
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.