Spate · Granite · West / Connemara, IE

Invermore

Invermore lough surrounded by Connemara bogland and low hills.

Historically important Connemara sea-trout fishery, documented alongside Owengowla in Gargan et al.

Prime · Atlantic Salmon
Cascade · 8-10
Primelive now
Prime conditions — go now
River high but settled. Heavy water — fish big and slow.
75% confidence
What moved it
  • LevelProxyvia Erriff
  • Water temp12.8°C
  • ClarityClear
Today's fly
Cascade
Cascade8-10
Regional salmon default — river-specific evidence is thin.
Conditions on the water
Proxy gauge
Level
Steady
Proxy
via Erriff
Water temp12.8°C
ClarityClear
Weather16°C
WindS 28 km/h
Pressure1016 hPa
Rain · recent18.5 mm
Rain · ahead13.3 mm

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

Water temperature for Atlantic Salmon
Ideal
13°C est.ideal 10–16°C
0°14°28°
How to fish it · for Atlantic Salmon
When
All day is fishable. Peaks around mid-morning (10-12) and late afternoon (4-6pm). A change in light — cloud passing over the sun, or the first shadow reaching the water — can trigger a take.
Where
Focus on the slower water at pool edges, inside bends, and behind large boulders. Fish won't hold in the main current at this height. Streamy water that's normally too shallow can hold fish in high water.
Method
Medium-paced swing, fly fishing just below the surface. Fish are willing to move — a steady broadside presentation across the current is ideal. Vary speed through the swing.. Slow intermediate or light sink-tip. Small-medium: size 8-12 doubles, small tubes. Fish are willing to move — let them come to the fly.
Kit
10 ft #7/8 single-hander, floating line, 10–12 lb fluoro leader. Boat seat and waterproofs for the drift.
Why this works
The river is in textbook shape. River dropping nicely into shape after a lift — textbook conditions. Clearing nicely — classic taking conditions. 12.8°C — in the ideal taking range for autumn salmon. This is the window experienced salmon anglers wait for — if you can get to the river, go now.
Likely species
Hatch timeline · todayPeak at 6am

Hatch predictions

Today's headline hatch shown — see all 12 active hatches hour by hour as a supporter.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 guilds as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 4 as a supporter.

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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 · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Salmon runRun
1
2
2
2
2
2
2
1
Heather FlyHatch
2
2
Daddy Long LegsHatch
2
3
2
Claret DunHatch
2
3
2
Murrough (Great Red Sedge)Hatch
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.
  • In Galway, Connemara and Ballinakill districts it is an offence to kill sea trout over 40 cm
  • C&R barbless hook rules apply after bag limit
  • State rod licence required.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
  1. Invermore lough surrounded by Connemara bogland and low hills.
    Loch Inbhair Mór (Invermore), part of the Invermore fishery system near Cashel, Connemara.
  2. Terrain map of the venue
    Terrain map
About this water

Historically important Connemara sea-trout fishery, documented alongside Owengowla in Gargan et al.'s long-running monitoring programme as one of the systems that collapsed in 1989 and failed to recover substantially. The research explicitly links the collapse to the onset of marine salmon farming and exceptionally low marine survival during the sea-lice era. This is a place with real history but a documented collapse, so it's best approached as a heritage story rather than a straightforward modern destination. If the current sporting value does not match the historical fame, say so clearly rather than trading on nostalgia. 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)
  • Ecology: Unknown
  • Chemical: Unknown
The full read · show the working · for Atlantic Salmon · confidence 75%
How the river scores — hydrology factors
Water heightHigh But Manageable+0.8
Recent riseNone0.0
Falling after liftDropping Nicely Into Shape+4.5
Water temperatureCool To Moderate+3.5
Time in seasonLate Season+0.8
ClarityClearing+2.4
Hydrology base12.0
Rules that fired
High But Dropping Into Shape Bonus+0.75
Clearing After Spate Bonus+1
Will they take?Willingcaps the band

Fish should be willing to take — clearing, stained water.

Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Erriffproxy
What would change the calculation
No prolonged stable spell before the current rise.
Directions
Seasons & zones
  • Salmon 1 February → 30 SeptemberC&R

Sea trout: Variable seasonal (2026)

Related guides
Casting instructors near here
Booking & contacts