Spate · Granite · West / South Mayo

Carrowniskey

Carrowniskey terrain map
Terrain map

A short south Mayo spate river running off the slopes of Croagh Patrick and the Sheeffry Hills to the sea near Louisburgh.

Fair · Atlantic Salmon
Fairlive now
Decent — worth a look
Low and clear — careful approach country. Low water tactics — small singles, riffling hitch in the smooth glides.
50% confidence
What moved it
  • LevelHeavy rain recentlyNo gauge reading
  • Water temp16.1°C
  • ClarityClear
Conditions on the water
Estimate
Level
Heavy rain recently
No gauge reading
Water temp16.1°C
ClarityClear
Weather13°C
WindNW 19 km/h
Pressure1026 hPa
Rain · recent30.8 mm
Rain · ahead6.4 mm

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

Water temperature for atlantic salmon
Warm — slow
16°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
Fair — water clarity is working for you, but time of day is the limiting factor today.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 3 active hatches hour by hour 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 · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Salmon runRun
1
2
2
2
2
1
Sea trout runRun
1
2
2
1
Daddy Long LegsHatch
2
3
2
March BrownHatch
2
3
2
GrannomHatch
2
2
Large StoneflyHatch
2
3
2

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

Permits & access
Permit required — see local rules.
  • Western district
  • IFI managed in part; part of the river held privately by the Harman family
  • Shrimp (natural and artificial) is prohibited
  • State rod licence required.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
About this water

A short south Mayo spate river running off the slopes of Croagh Patrick and the Sheeffry Hills to the sea near Louisburgh. Part of the Ballinakill coastal district. Sea trout and grilse enter on the summer spates; the river dries to a trickle in July drought. Roonagh Lough, on the system, also offers fishing for both species when conditions allow. Part of the river is held privately by the Harman family; the rest is club and IFI water with day permits available locally. The setting is exceptional — the reek of Croagh Patrick above, Clew Bay below — but the fishing demands water. Given the right conditions, fish move fast through the system and are fresh. A river to visit opportunistically rather than plan a trip around, but one worth knowing for its quality when conditions align. For 2026 this is a catch-and-release fishery under the Wild Salmon & Sea Trout Tagging Scheme — all salmon and grilse must be returned.

  • Granite
Water quality (WFD)
  • EcologyUnknown
  • ChemicalUnknown
Why this score · for atlantic salmon
  • Temperature5430% weight
  • Flow3025% weight
  • Clarity9520% weight
  • Feeding Time1015% weight
  • Pressure8510% weight
Directions
Seasons & zones
  • Salmon1 April → 30 SeptemberC&R
  • Sea trout1 June → 30 September
Related guides
Booking & contacts