Spate · Granite · West / South Mayo, IE

Bunowen River (Louisburgh)

The Bunowen River flowing under a stone bridge near Louisburgh, County Mayo, Ireland.

A small south Mayo spate river rising in the Sheefry Hills above Louisburgh and dropping fast to enter Clew Bay west of the village.

Marginal · Atlantic Salmon
Cascade · 10-14
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
  • LevelProxyvia Erriff
  • Water temp18.2°C
  • ClarityClear
Today's fly
Cascade
Cascade10-14
Regional salmon default — river-specific evidence is thin.
Conditions on the water
Proxy gauge
Level
Steady
Proxy
via Erriff
Water temp18.2°C
ClarityClear
Weather15°C
WindNW 13 km/h
Pressure1023 hPa
Rain · recent5.4 mm
Rain · ahead2.7 mm

No gauge on this water — conditions are inferred from Erriff. The trend transfers, the absolute level does not.

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 18.2°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 8 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 2 guilds with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 2 with Pro.

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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
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.

Ranked for today
Atlantic Salmon fly box

Connemara/Mayo low water: a lightly-dressed shrimp on a floating line with sink tip, sized down from 8s in cold spring water to 12s and 14s as summer water warms and clears. Where the current runs faster, a slim tube or hairwing swung through tracks better than a shrimp.

Permits & access
Permit required — see local rules.
  • Ballinakill Fishery District
  • Daily and weekly permits available
  • Mostly fly fishing; some worm and spinning allowed on certain stretches
  • Sea trout must be released alive
  • State rod licence required.
What's coming
Plan ahead
5-day outlook
Cooler water nearby · 2
Water here around 18°C — probably warm enough to stress Atlantic Salmon . These are likely cooler.
Gallery · 2
  1. The Bunowen River flowing under a stone bridge near Louisburgh, County Mayo, Ireland.
    The Bunowen River and bridge at Louisburgh, County Mayo.
  2. Terrain map of the venue
    Terrain map
About this water

A small south Mayo spate river rising in the Sheefry Hills above Louisburgh and dropping fast to enter Clew Bay west of the village. Part of the Ballinakill Fishery District. Salmon and sea trout enter on summer spates from mid-June onwards; the river runs hard and clear briefly after rain and dries to a trickle when the weather is settled. Mostly fly water, with worm and spinning permitted on certain stretches. Sister river to the Carrowniskey just to the south — same Mweelrea-Sheefry catchment, same water-dependent character. The right water turns the Bunowen into a real fishery; without it, you walk. For 2026 this is a catch-and-release fishery under the Wild Salmon & Sea Trout Tagging Scheme — all salmon and grilse must be returned.

Hatches & food

EPA monitoring of the Bunowen's WFD-assessed reaches confirms mayflies, stoneflies, caddis, aquatic diptera and freshwater crustaceans including gammarus are present. This is food-presence evidence from kick sampling only — it doesn't establish emergence timing, abundance, or a dependable rise.

  • Granite
Water quality (WFD)
  • EcologyUnknown
  • ChemicalUnknown
Why this score · for Atlantic Salmon
  • Temperature2330% weight
  • Flow6025% weight
  • Clarity9520% weight
  • Feeding Time1015% weight
  • Pressure8510% weight
Directions
Seasons & zones
  • Salmon 1 April30 SeptemberC&R
  • Sea trout 1 June30 September
Related guides
Casting instructors near here
Booking & contacts