Mayflies
Caddisflies
- Ecology: Unknown
- Chemical: Unknown
Water temperature for Atlantic Salmon
Warm — slow18°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
Mayflies
- Blue-winged oliveMost likely#16–18 · DunDuns are up; a sherry spinner fall may follow.
- Large dark oliveAlso possible#14–16 · EmergerDead-drift the emerger — it's sitting in the film.
- Iron BlueAlso possible#16–18 · DunCold, grey day — the dun sits long. Good dry-fly water.
Caddisflies
- Satin sedgeMost likelyLower confidence#12–14 · Egg-layingSkitter it at dusk — this one's fished, not dead-drifted.
- Net-spinning caddis (S. Europe)Also possibleLower confidence#12–14–16 · PupaWidespread riffle net-spinner; evening emergence.
- GrannomAlso possible#14–16 · PupaPupa first, then dries as the adults come off.
Hatch timeline · todayPeak at 6am
Hatch predictions
Today's headline hatch shown — see all 12 active hatches hour by hour with Pro.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 guilds with Pro.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey
Hatch predictions
Top prey shown — see all 2 with Pro.
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 · 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
1
CapererHatch
2
3
3
2
Heather FlyHatch
2
2
Autumn DunHatch
2
3
2
Daddy Long LegsHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Atlantic Salmon fly box
Permits & access
Permit required — see local rules.
- Managed by Colligan & District Angling Club
- State rod licence required; confirm current permit arrangements locally.
What's coming
Plan ahead
5-day outlook
Cooler water nearby · 2
Water here around 18°C — probably warm enough to stress Atlantic Salmon . These are likely cooler.
Water quality (WFD)
Why this score · for Atlantic Salmon
- Temperature2730% weight
- Flow6025% weight
- Clarity9520% weight
- Feeding Time5015% weight
- Pressure8510% weight
Directions
Seasons & zones
- Salmon 1 February → 30 September
- Sea trout 1 May → 31 July
Sea trout: Variable seasonal (2026)
Related guides
Casting instructors near here
Booking & contacts
River Colligan
Water temperature for Atlantic Salmon
Warm — slow18°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
Mayflies
- Blue-winged oliveMost likely#16–18 · DunDuns are up; a sherry spinner fall may follow.
- Large dark oliveAlso possible#14–16 · EmergerDead-drift the emerger — it's sitting in the film.
- Iron BlueAlso possible#16–18 · DunCold, grey day — the dun sits long. Good dry-fly water.
Caddisflies
- Satin sedgeMost likelyLower confidence#12–14 · Egg-layingSkitter it at dusk — this one's fished, not dead-drifted.
- Net-spinning caddis (S. Europe)Also possibleLower confidence#12–14–16 · PupaWidespread riffle net-spinner; evening emergence.
- GrannomAlso possible#14–16 · PupaPupa first, then dries as the adults come off.
Hatch timeline · todayPeak at 6am
Hatch predictions
Today's headline hatch shown — see all 12 active hatches hour by hour with Pro.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 guilds with Pro.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey
Hatch predictions
Top prey shown — see all 2 with Pro.
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 · 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
1
CapererHatch
2
3
3
2
Heather FlyHatch
2
2
Autumn DunHatch
2
3
2
Daddy Long LegsHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Atlantic Salmon fly box
Permits & access
Permit required — see local rules.
- Managed by Colligan & District Angling Club
- State rod licence required; confirm current permit arrangements locally.
What's coming
Plan ahead
5-day outlook
Cooler water nearby · 2
Water here around 18°C — probably warm enough to stress Atlantic Salmon . These are likely cooler.
Water quality (WFD)
- Ecology: Unknown
- Chemical: Unknown
Why this score · for Atlantic Salmon
- Temperature2730% weight
- Flow6025% weight
- Clarity9520% weight
- Feeding Time5015% weight
- Pressure8510% weight
Directions
Seasons & zones
- Salmon 1 February → 30 September
- Sea trout 1 May → 31 July
Sea trout: Variable seasonal (2026)
Related guides
Casting instructors near here
Booking & contacts