Caddisflies
Gammarids
- Ecology: Good
- Chemical: Unknown
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_32M080920
Rules at a glance
- Free fishing
- Fly only
Water temperature for Atlantic Salmon
Warm — slow16°C est.ideal 10–16°C
0°14°28°
How to fish it · for Atlantic Salmon
When
Spring run from late March; grilse from June; main run summer through September. Spate-driven — fish 12 to 24 hours after rain on the drop. Fish the named pools methodically.
Where
Erriff Fishery beats from below Aasleagh Falls down to the Killary fjord. Heads, tails, and named lies on the assigned beat.
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
The river is in textbook shape. River dropping nicely into shape after a lift — textbook conditions. Clearing nicely — classic taking conditions. 14.1°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
Caddisflies
- Net-spinning caddisMost likelyLower confidenceNearest relative#12–14–16 · PupaWidespread riffle net-spinner; evening emergence.
- CapererAlso possibleLower confidence#10–12 · AdultBig autumn sedge; fish dry at last light.
Hatch timeline · todayPeak at 12 Uhr
12 Uhr(now) — Heather Fly
Stage: Terrestrials on topApproach: Dry flyActivity: 67%
Also:Reed Smut52%Autumn Dun31%Cinnamon Sedge29%
Peak emergence windowWeather boost9 food groups active
Peak activity at 12 Uhr — Heather Fly (Heather Fly, Peak emergence window)
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Top prey shown — see all 2 as a supporter.
Start free trial14-day free trial. Cancel anytime.
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
March BrownHatch
2
3
2
CapererHatch
2
3
3
2
Heather FlyHatch
2
2
Autumn DunHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Fly box · Atlantic Salmon
Permits & access
Permit required — see local rules.
- The Erriff fishery (Aasleagh Lodge) — advance booking essential
- All fish released alive
- State rod licence required.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
Aasleagh Falls on the Erriff River, Connemara Terrain map
Water quality (WFD)
The full read · show the working · for Atlantic Salmon · confidence 75%
How the river scores — hydrology factors
Water heightMedium Ideal+2.3
Recent riseNone0.0
Falling after liftDropping Nicely Into Shape+4.5
Water temperatureCool To Moderate+5.0
Time in seasonLate Season+0.3
ClarityClearing+2.4
Hydrology base14.5
Rules that fired
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 temperaturelive gauge readinggauge
Level / flowon-river gaugeobserved
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
Permits & access
Clubs & associations
- Erriff FisheryDay tickets
Erriff
Water temperature for Atlantic Salmon
Warm — slow16°C est.ideal 10–16°C
0°14°28°
How to fish it · for Atlantic Salmon
When
Spring run from late March; grilse from June; main run summer through September. Spate-driven — fish 12 to 24 hours after rain on the drop. Fish the named pools methodically.
Where
Erriff Fishery beats from below Aasleagh Falls down to the Killary fjord. Heads, tails, and named lies on the assigned beat.
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
The river is in textbook shape. River dropping nicely into shape after a lift — textbook conditions. Clearing nicely — classic taking conditions. 14.1°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
Caddisflies
- Net-spinning caddisMost likelyLower confidenceNearest relative#12–14–16 · PupaWidespread riffle net-spinner; evening emergence.
- CapererAlso possibleLower confidence#10–12 · AdultBig autumn sedge; fish dry at last light.
Hatch timeline · todayPeak at 12 Uhr
12 Uhr(now) — Heather Fly
Stage: Terrestrials on topApproach: Dry flyActivity: 67%
Also:Reed Smut52%Autumn Dun31%Cinnamon Sedge29%
Peak emergence windowWeather boost9 food groups active
Peak activity at 12 Uhr — Heather Fly (Heather Fly, Peak emergence window)
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Top prey shown — see all 2 as a supporter.
Start free trial14-day free trial. Cancel anytime.
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
March BrownHatch
2
3
2
CapererHatch
2
3
3
2
Heather FlyHatch
2
2
Autumn DunHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Fly box · Atlantic Salmon
Permits & access
Permit required — see local rules.
- The Erriff fishery (Aasleagh Lodge) — advance booking essential
- All fish released alive
- State rod licence required.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
Aasleagh Falls on the Erriff River, Connemara Terrain map
Water quality (WFD)
- Ecology: Good
- Chemical: Unknown
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_32M080920
The full read · show the working · for Atlantic Salmon · confidence 75%
How the river scores — hydrology factors
Water heightMedium Ideal+2.3
Recent riseNone0.0
Falling after liftDropping Nicely Into Shape+4.5
Water temperatureCool To Moderate+5.0
Time in seasonLate Season+0.3
ClarityClearing+2.4
Hydrology base14.5
Rules that fired
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 temperaturelive gauge readinggauge
Level / flowon-river gaugeobserved
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
Permits & access
Clubs & associations
- Erriff FisheryDay tickets