- Ecology: Moderate
- Chemical: Unknown
NRW (Wales) · UKGB110066060030
Water temperature for Sea Trout
Ideal15°C est.ideal 8–15°C
0°14°28°
How to fish it · for Sea Trout
When
June through September; July into August prime. Night fishing from full dark when water rises above 13°C. NRW classifies the sewin stock 'At Risk' across Wales — fish carefully if at all, treat C&R as a default. Run timing is highly rain-dependent; windows after summer spates are the practical time.
Where
Lower Conwy pool tails through to the Conwy estuary tidal limit.
Method
Across-and-down on a floating line with small wets — Medicine, Teal Blue and Silver, Stoat's Tail. Steady swing through the tail-outs, never hurry.
Kit
10 ft #6/7, floating line, 8 to 10 lb fluoro tippet. Spare leader on a wrist spool. Headlamp sparingly; let your eyes adjust.
Why this works
Poor — water temperature is working for you, but water clarity is the limiting factor today. ⏰ Sea trout become most active after dark, but this stretch closes at 20:25 — before that window fully opens. Fish hard in the last legal hour: overcast skies and warm evenings can bring fish on early even in fading light.
Hatch timeline · todayPeak at 6am
Hatch predictions
Today's headline hatch shown — see all 7 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.
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
Trout seasonSeason
1
2
2
2
2
2
1
Daddy Long LegsHatch
2
3
2
March BrownHatch
2
3
2
GrannomHatch
2
2
Large StoneflyHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Sea Trout fly box
Top
1-2 inch · Tube
In deep pools and dark water, silhouette and contrast do the work colour cannot. A fly that reads as black against depth is enough. Fish it broadside, hold the swing, let it hang at the dangle — that is when the best fish take.
2-4 inch · Streamer
A mobile eel-like profile that undulates through deep pools — effective when sea trout are lying deep and not responding to conventional wets.
Beats · 1
River Machno — National Trust (Ysbyty Ifan)Enquiry
The Conwy's first major tributary, running through the slate-quarrying Penmachno valley past Pandy Falls and Machno Falls — a distinct National Trust fishery, separate from Betws-y-Coed Anglers Club's water on the Conwy/Llugwy/Lledr.
Visit official site ↗What's coming
Plan ahead
5-day outlook
Fishing better nearby · 5
Gallery · 6
Afon Conwy near Betws-y-Coed 
River Conwy at Fairy Glen 
River Conwy near Dolgarrog 
Afon Conwy at Tal-y-Cafn 
River Conwy, Llanrwst Terrain map
Water quality (WFD)
The full read · show the working · for Sea Trout · confidence 45%
How the river scores — hydrology factors
Water heightMedium Ideal+3.4
Recent riseStrong Recent Rise After Low Or Stale+10.5
Falling after liftStill Rising Hard-0.6
Water temperatureCool To Moderate+3.5
Time in seasonSummer Peak Window+0.8
ClarityClearing+2.4
Hydrology base20.0
Rules that fired
Rise Plus Good Temp Bonus+0.75
Will they take?Willingcaps the band
Fish should be willing to take — clearing, stained water, fresh fish moving on the lift.
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
What would change the calculation
No prolonged stable spell before the current rise.
Directions
Seasons & zones
- Salmon 20 March → 17 October
- Trout 3 March → 30 September
Sea trout: Variable seasonal (2026) — NRW At Risk classification. North Wales spate river with sea trout present but stocks in decline. Run timing is highly rain-dependent; windows after summer spates are the productive periods.
Salmon: Negligible (2026) — NRW / EA 2024 Salmon Stocks Assessment classifies this Welsh principal salmon river 'at risk' — egg deposition below Conservation Limit. All Wales byelaws (in force 2020-2030) make catch & release mandatory. Conservation priority; not a salmon fishing destination. The Conwy holds North Wales salmon interest but stocks are at risk.
Related guides
Casting instructors near here
Booking & contacts
Clubs & associations
Conwy
Water temperature for Sea Trout
Ideal15°C est.ideal 8–15°C
0°14°28°
How to fish it · for Sea Trout
When
June through September; July into August prime. Night fishing from full dark when water rises above 13°C. NRW classifies the sewin stock 'At Risk' across Wales — fish carefully if at all, treat C&R as a default. Run timing is highly rain-dependent; windows after summer spates are the practical time.
Where
Lower Conwy pool tails through to the Conwy estuary tidal limit.
Method
Across-and-down on a floating line with small wets — Medicine, Teal Blue and Silver, Stoat's Tail. Steady swing through the tail-outs, never hurry.
Kit
10 ft #6/7, floating line, 8 to 10 lb fluoro tippet. Spare leader on a wrist spool. Headlamp sparingly; let your eyes adjust.
Why this works
Poor — water temperature is working for you, but water clarity is the limiting factor today. ⏰ Sea trout become most active after dark, but this stretch closes at 20:25 — before that window fully opens. Fish hard in the last legal hour: overcast skies and warm evenings can bring fish on early even in fading light.
Hatch timeline · todayPeak at 6am
Hatch predictions
Today's headline hatch shown — see all 7 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.
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
Trout seasonSeason
1
2
2
2
2
2
1
Daddy Long LegsHatch
2
3
2
March BrownHatch
2
3
2
GrannomHatch
2
2
Large StoneflyHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Sea Trout fly box
Top
1-2 inch · Tube
In deep pools and dark water, silhouette and contrast do the work colour cannot. A fly that reads as black against depth is enough. Fish it broadside, hold the swing, let it hang at the dangle — that is when the best fish take.
2-4 inch · Streamer
A mobile eel-like profile that undulates through deep pools — effective when sea trout are lying deep and not responding to conventional wets.
Beats · 1
River Machno — National Trust (Ysbyty Ifan)Enquiry
The Conwy's first major tributary, running through the slate-quarrying Penmachno valley past Pandy Falls and Machno Falls — a distinct National Trust fishery, separate from Betws-y-Coed Anglers Club's water on the Conwy/Llugwy/Lledr.
Visit official site ↗What's coming
Plan ahead
5-day outlook
Fishing better nearby · 5
Gallery · 6
Afon Conwy near Betws-y-Coed River Conwy at Fairy Glen River Conwy near Dolgarrog Afon Conwy at Tal-y-Cafn River Conwy, Llanrwst Terrain map
Water quality (WFD)
- Ecology: Moderate
- Chemical: Unknown
NRW (Wales) · UKGB110066060030
The full read · show the working · for Sea Trout · confidence 45%
How the river scores — hydrology factors
Water heightMedium Ideal+3.4
Recent riseStrong Recent Rise After Low Or Stale+10.5
Falling after liftStill Rising Hard-0.6
Water temperatureCool To Moderate+3.5
Time in seasonSummer Peak Window+0.8
ClarityClearing+2.4
Hydrology base20.0
Rules that fired
Rise Plus Good Temp Bonus+0.75
Will they take?Willingcaps the band
Fish should be willing to take — clearing, stained water, fresh fish moving on the lift.
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
What would change the calculation
No prolonged stable spell before the current rise.
Directions
Seasons & zones
- Salmon 20 March → 17 October
- Trout 3 March → 30 September
Sea trout: Variable seasonal (2026) — NRW At Risk classification. North Wales spate river with sea trout present but stocks in decline. Run timing is highly rain-dependent; windows after summer spates are the productive periods.
Salmon: Negligible (2026) — NRW / EA 2024 Salmon Stocks Assessment classifies this Welsh principal salmon river 'at risk' — egg deposition below Conservation Limit. All Wales byelaws (in force 2020-2030) make catch & release mandatory. Conservation priority; not a salmon fishing destination. The Conwy holds North Wales salmon interest but stocks are at risk.
Related guides
Casting instructors near here
Booking & contacts
Clubs & associations