Spate · Granite · West / South Mayo

Owenwee River (Louisburgh)

Owenwee River (Louisburgh) terrain map

A small Croagh Patrick spate river near Louisburgh in south Mayo, fished alongside its neighbours the Bunowen and Carrowniskey.

Poor · Atlantic Salmon
Cascade · 10-14
Poorlive now
Slow going — better windows ahead
River temperature is the limiting factor today, not the flow. The thermal advice above stands. Rest this water for the species today.
80% confidence
What moved it
  • LevelProxyvia Erriff
  • Water temp19.1°C
  • ClarityVery colouredColouring up
Today's fly
Cascade
Cascade10-14
Regional salmon default — river-specific evidence is thin.
Conditions on the water
Proxy gauge
Level
Rising
Proxy
via Erriff
Water temp19.1°C
ClarityVery coloured
Weather21°C
WindSW 22 km/h
Pressure1019 hPa
Rain · recent1.7 mm
Rain · ahead3.1 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
19°C est.ideal 10–14°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 19.1°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

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Sub-surface · on the nymphunder the surface

Hatch predictions

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Beyond the hatch · worth watchingambient prey

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Evidence
Survey-backed · regionalHigh confidence

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

Updated 11 hours ago

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
What's coming
Plan ahead
5-day outlook
Water here around 19°C. Nothing cooler within range — carry a thermometer.
About this water

A small Croagh Patrick spate river near Louisburgh in south Mayo, fished alongside its neighbours the Bunowen and Carrowniskey. Grilse and sea trout run from June on a rise of water; for 2026 it is catch-and-release. Not to be confused with the Donegal Glen's Yellow River, which is also called the Owenwee. Enquire locally around Louisburgh; the Salmon and Sea Trout State Licence is required.

Hatches & food

EPA monitoring of the Owenwee's Mayo reaches confirms mayflies, stoneflies, caddis, aquatic diptera and freshwater crustaceans including gammarus are present. This is food-presence evidence from kick sampling only, not a record of emergence timing or a visible hatch.

  • Granite
Water quality (WFD)
  • Ecology: Unknown
  • Chemical: Unknown
Why this score · for Atlantic Salmon
  • Temperature1330% weight
  • Flow6025% weight
  • Clarity1520% weight
  • Feeding Time9015% weight
  • Pressure8510% weight
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Salmon 1 April → 30 SeptemberC&R
  • Sea trout 1 June → 30 SeptemberC&R
Related guides
Atlantic Salmonsalmon tacticsIrish Salmon Rivers Guidefive great salmon fisheriesConnemaraIrish fishing
Casting instructors near here
Booking & contacts
Permits & access