Stoneflies
Caddisflies
Chironomids
- Ecology: Unknown
- Chemical: Unknown
Rules at a glance
- Free fishing
- Fly only
Water temperature for Atlantic Salmon
Warm — slow17°C est.ideal 10–16°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 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
- 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.
- Green SedgeAlso possibleLower confidenceNearest relative#10–12–14–16 · NymphFree-living green caddis larva; fast stony riffles.
Hatch timeline · todayPeak at 12 Uhr
12 Uhr(now) — Heather Fly
Stage: Terrestrials on topApproach: Dry flyActivity: 66%
Also:Daddy Long Legs41%
Peak emergence windowWeather boost6 food groups active
Peak activity at 12 Uhr — Heather Fly (Heather Fly, Peak emergence window)
Sub-surface · on the nymphunder the surface
Hatch predictions
Supporters see the full sub-surface read.
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
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
Fly box · Atlantic Salmon
10–14 doubles · Salmon fly
Traditional Irish salmon fly with long local history. Popular on the Munster rivers; the black/yellow combination has worked reliably for grilse fishing throughout the summer.
Permits & access
Permit required — see local rules.
- Part of Waterville estate.
What's coming
Plan ahead
5-day outlook
Water here around 18°C. Nothing cooler within range — carry a thermometer.
Water quality (WFD)
Why this score · for Atlantic Salmon
- Temperature2730% weight
- Flow4025% weight
- Clarity1520% weight
- Feeding Time7015% weight
- Pressure8510% weight
Directions
Seasons & zones
- Salmon 17 January → 30 September
Sea trout: Variable seasonal (2026)
Related guides
Casting instructors near here
Booking & contacts
Lough Derriana
Water temperature for Atlantic Salmon
Warm — slow17°C est.ideal 10–16°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 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
- 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.
- Green SedgeAlso possibleLower confidenceNearest relative#10–12–14–16 · NymphFree-living green caddis larva; fast stony riffles.
Hatch timeline · todayPeak at 12 Uhr
12 Uhr(now) — Heather Fly
Stage: Terrestrials on topApproach: Dry flyActivity: 66%
Also:Daddy Long Legs41%
Peak emergence windowWeather boost6 food groups active
Peak activity at 12 Uhr — Heather Fly (Heather Fly, Peak emergence window)
Sub-surface · on the nymphunder the surface
Hatch predictions
Supporters see the full sub-surface read.
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
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
Fly box · Atlantic Salmon
10–14 doubles · Salmon fly
Traditional Irish salmon fly with long local history. Popular on the Munster rivers; the black/yellow combination has worked reliably for grilse fishing throughout the summer.
Permits & access
Permit required — see local rules.
- Part of Waterville estate.
What's coming
Plan ahead
5-day outlook
Water here around 18°C. Nothing cooler within range — carry a thermometer.
Water quality (WFD)
- Ecology: Unknown
- Chemical: Unknown
Why this score · for Atlantic Salmon
- Temperature2730% weight
- Flow4025% weight
- Clarity1520% weight
- Feeding Time7015% weight
- Pressure8510% weight
Directions
Seasons & zones
- Salmon 17 January → 30 September
Sea trout: Variable seasonal (2026)
Related guides
Casting instructors near here
Booking & contacts