Spate · Granite · West / Connemara, IE

Ballynahinch / Lough Inagh

A small stone fishing hut and moored boat beside a lake on the Ballynahinch Fishery estate, Connemara, with the mountain Benlettery in the background

Still probably the strongest brand-name Connemara sea-trout proposition you can talk about without overselling.

Marginal · Atlantic Salmon
Silver Badger · 10-12
Marginallive now
Marginal — persistence required
River steady at a fishable height. A short window at best — fish the sure lies and move on.
85% confidence
What moved it
  • LevelProxyvia Erriff
  • Water temp18.1°C
  • ClarityClear
Today's fly
SB
Silver Badger10-12
From the river-specific salmon pack.
Conditions on the water
Proxy gauge
Level
Steady
Proxy
via Erriff
Water temp18.1°C
ClarityClear
Weather13°C
WindNW 15 km/h
Pressure1023 hPa
Rain · recent6.8 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
Spring from March; grilse build through June and July. The Ballynahinch / Lough Inagh system fishes both river and lough drifts. Spate-responsive on the river, settled-wind for the lough.
Where
Ballynahinch Castle beats and the loughs upstream — Inagh and Derryclare. Named pools on the river; drift lines along the shore margins on the loughs.
Method
Small doubles 10 to 12 across-and-down on a floating line; small tubes on a sink-tip in spring water. Catch-and-release encouraged across most Irish salmon water.
Kit
10 ft #7 single-hander on the smaller spate rivers; 11 ft switch where the river opens out. Floating line plus light sink-tip. 10 to 12 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.
Likely species
Caddisflies
  • Large sedgesMost likely
    #8–10 · Adult
    Big waked sedge in the last light and after dark.
  • Satin sedgeAlso possibleLower confidence
    #12–14 · Egg-laying
    Skitter it at dusk — this one's fished, not dead-drifted.
Hatch timeline · todayPeak at 6am

Hatch predictions

Today's headline hatch shown — see all 5 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

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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
1
Sea trout runRun
1
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

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.

SB
Silver BadgerTop
10-12 · Salmon fly
From the river-specific salmon pack.
Permits & access
Permit required — see local rules.
  • Ballynahinch Castle fishery — advance booking essential
  • Premium pricing
  • Lough Inagh Lodge controls Inagh fishing
  • State rod licence required.
What's coming
Plan ahead
5-day outlook
Cooler water nearby · 1
Water here around 18°C — probably warm enough to stress Atlantic Salmon . These are likely cooler.
Gallery · 2
  1. A small stone fishing hut and moored boat beside a lake on the Ballynahinch Fishery estate, Connemara, with the mountain Benlettery in the background
    A fishing hut and boat on the Ballynahinch Fishery, with Benlettery behind
  2. Terrain map of the venue
    Terrain map
About this water

Still probably the strongest brand-name Connemara sea-trout proposition you can talk about without overselling. Sea trout start running in June, peak in July, and continue on floods through the rest of the season. Ballynahinch Castle still says Lower Ballynahinch Lake can produce sea trout in midsummer — but that confidence sits within a diminished modern baseline, not a return to historical abundance. Best approached as a modest-numbers, flood- and timing-dependent fishery rather than a restored glory-days one. The river-lake combination and the prestige of the fishery still matter; the stock story does not justify old-school hype. Grilse are the main salmon target, moving quickly through the system after rain. In Galway, Connemara and Ballinakill districts it is an offence to kill sea trout over 40 cm. Lough Inagh itself holds wild brown trout. The castle hotel fishery is among Ireland's most renowned. 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

No venue-specific hatch data yet; as a lough-river system typical of Connemara's acidic-lough country, expect buzzers and terrestrials to dominate over rich upwing hatches, with the connecting river adding occasional spate-driven stonefly and sedge activity - treat this as a general expectation, not an observed hatch.

  • Lough system
  • Granite
Water quality (WFD)
  • EcologyGood
  • ChemicalUnknown
What this classification means

EPA WFD 2019-2024 — Good ecological status; filled 2026-06-18. Source: EPA Ireland WFD 2019-2024 classification (catchments.ie / EDEN).

EPA (Ireland) · IEWE_32B090960

The full read · show the working · for Atlantic Salmon · confidence 85%
How the river scores — hydrology factors
Water heightMedium Ideal0.0
Recent riseNone0.0
Falling after liftNot Applicable0.0
Water temperatureCool To Moderate0.0
Time in seasonOpening Period0.0
ClarityClearing0.0
Hydrology base0.0
Legal gate: Unknown Check Local Rules
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Erriffproxy
Directions
Seasons & zones
  • Salmon 1 February30 SeptemberC&R
  • Sea trout 1 June30 September

Sea trout: Variable seasonal (2026)

Related guides
Casting instructors near here
Booking & contacts