Spate · Old Red Sandstone · South West / Cork

River Arigideen

River Arigideen terrain map

A lovely West Cork river draining some fifty-six square miles to the sea, the Arigideen is primarily a sea-trout fishery, with the occasional salmon or grilse through the season.

Marginal · Brown Trout
Pheasant Tail Nymph · 14-18
Marginallive now
Slow going — pick your moments
River temperature is the limiting factor today, not the flow. Fish dawn or dusk if you go at all, and handle everything with extra care.
80% confidence
What moved it
  • LevelProxyvia Bandon
  • Water temp20.0°C
  • ClarityClear
Today's fly
Pheasant Tail Nymph
Pheasant Tail Nymph14-18
Upstream
Conditions on the water
Proxy gauge
Level
Falling
Proxy
via Bandon
Water temp20.0°C
ClarityClear
Weather24°C
WindSW 21 km/h
Pressure1021 hPa
Rain · recent0.0 mm
Rain · ahead0.5 mm

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

Water temperature for Brown Trout
Warm — slow
20°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
Why this works
Water at 20°C — above the brown trout 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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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
2
2
1
Sea trout runRun
1
2
2
2
2
2
2
2
1
Trout seasonSeason
1
2
2
2
2
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
Brown Trout fly box
What's coming
Plan ahead
5-day outlook
Water here around 20°C. Nothing cooler within range — carry a thermometer.
About this water

A lovely West Cork river draining some fifty-six square miles to the sea, the Arigideen is primarily a sea-trout fishery, with the occasional salmon or grilse through the season. For 2026 it is catch-and-release only, for salmon and sea trout alike. Fish it on a flood, when fresh fish have run. There is disabled-angler access at Inchy Bridge. Single or double barbless hooks only, no worm, under Bye-law 982 of 2020. Arigideen Anglers Association and IFI Macroom hold the water.

Hatches & food

A West Cork old-red-sandstone spate river with acidic, soft water — stoneflies, sedges and terrestrials carry the resident trout, while the main fishery is summer sea trout taking sedges and wets on a flood.

  • Old red sandstone
The full read · show the working · for Brown Trout · confidence 80%
How the 28 is built — score × weight = contribution
Temperature25 × 28%7.0
Flow95 × 22%20.9
Clarity95 × 18%17.1
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity59 × 12%7.1
Conditions total= 66
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Bandonproxy
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Salmon 15 February → 30 SeptemberC&R
  • Sea trout 15 February → 12 OctoberC&R
  • Trout 15 February → 30 September

Sea trout: Variable seasonal (2026)

Related guides
ConnemaraIrish fishingEuro Nymphingsubsurface methods
Casting instructors near here
Booking & contacts
Permits & access