Stillwater · Sandstone · South West / Kerry (Waterville/Currane system), IE

Lough Derriana

Lough Derriana terrain map

Lough Derriana lies above the main Waterville system, a staging lough for migratory fish moving through the Kerry chain.

Marginal · Atlantic Salmon
Cascade · 10–14 doubles
Marginallive now
Marginal — persistence required
River temperature is the limiting factor today, not the flow. Fish the cool of dawn or dusk, land fish fast, and stop if one struggles to recover.
80% confidence
What moved it
  • LevelLight rain recentlyNo gauge reading
  • Water temp18.1°C
  • ClarityClear
Today's fly
Cascade
Cascade10–14 doubles
Universal SW Ireland salmon fly. Works on everything from the Cork Blackwater to the small Kerry spate rivers. Fish on a relaxed swing through the main pools; downsize for low summer water.
Conditions on the water
Estimate
Level
Light rain recently
No gauge reading
Water temp18.1°C
ClarityClear
Weather17°C
WindNW 14 km/h
Pressure1023 hPa
Rain · recent2.3 mm
Rain · ahead4.1 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

Water temperature for Atlantic Salmon
Warm — slow
18°C est.ideal 1014°C
0°14°28°
How to fish it · for Atlantic Salmon
When
Morning into early afternoon.
Where
Pool tails, steadier runs, and any water with pace.
Method
Fish a sensible line-and-fly combination for the height and pace of water.
Kit
13 ft #8/9 double-hander in spate, 10 ft #8 single in low water. Floating line plus a fast-sink tip. 12–15 lb fluoro tippet.
Why this works
Water at 18.1°C — above the atlantic salmon caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots.
Hatch timeline · todayPeak at 6am

Hatch predictions

Today's headline hatch shown — see all 7 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 4 with Pro.

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Evidence
Survey-backed · regionalHigh confidence

Backed by regional invertebrate surveys; no sampling on this exact reach yet.

Through the year
0–3 scale · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Salmon runRun
1
2
2
2
2
2
2
2
1
Daddy Long LegsHatch
2
3
2
Murrough (Great Red Sedge)Hatch
2
3
2
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Lake OliveHatch
1
2
2
2
2
2
1

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Atlantic Salmon fly box

Munster Blackwater and neighbouring SW spring rivers: when the water is cold or running high, a tube fly fished deep on a Skagit head or sinking shooting head with a heavier leader finds fish that a floating line can't reach. Comes down to a 9'-10' single-handed rod and small flies on an 8lb tippet once the river drops into summer trim.

Permits & access
Permit required — see local rules.
  • Part of Waterville estate.
What's coming
Plan ahead
5-day outlook
Water here around 18°C. Nothing cooler within range — carry a thermometer.
About this water

Lough Derriana lies above the main Waterville system, a staging lough for migratory fish moving through the Kerry chain. Boats are available at Clodragh; there is no public bank access. The Waterville/Currane management arrangements are currently unsettled — confirm access locally before you make the drive. For 2026 this remains an open fishery — salmon may be retained in season under the Wild Salmon & Sea Trout Tagging Scheme and bag limits, with catch-and-release at other times.

Under the surface

Lough Derriana is one of the larger upper loughs of the Waterville system in south Kerry, lying among the chain of lakes — Namona, Cloonaghlin, Iskanamacteery — that the Cummeragh and Owengarriff rivers thread down to Lough Currane and the sea. This is remote, beautiful Old Red Sandstone country beneath the high hills of the Iveragh peninsula, the water clear and soft off a catchment of sandstone rock and blanket bog. Derriana is sea-trout water first and foremost, the fish running up into the system off the Currane when the rivers fill and flood, with salmon among them on the high water and wild brown trout through the season. The character is upland lough — rocky shoals, sandstone reefs and peat-stained bays, exposed to the Atlantic wind. This is boat-and-drift fishing read by the wave and the shoreline lies; the connecting streams wade steadily on firm rock.

Wading: Atlantic wind on an exposed lough

Hatches & food

No venue-specific hatch data yet; as an oligotrophic upland lough in this Cork/Kerry sandstone-freestone system, expect the typical acid-water stillwater character of sparse buzzer and sedge activity with occasional terrestrial fall — treat this as a general expectation, not an observed hatch.

  • Lough system
  • Sandstone
  • Unconfined
  • Stillwater
  • Lough
Water quality (WFD)
  • EcologyUnknown
  • ChemicalUnknown
Why this score · for Atlantic Salmon
  • Temperature2430% weight
  • Flow6025% weight
  • Clarity9520% weight
  • Feeding Time9015% weight
  • Pressure8510% weight
Directions
Seasons & zones
  • Salmon 17 January30 September

Sea trout: Variable seasonal (2026)

Related guides
Casting instructors near here
Booking & contacts