Stoneflies
Caddisflies
Gammarids
- Ecology: Good
- Chemical: Unknown
NRW (Wales) · UKGB110064048390
Water temperature for Sea Trout
Warm — slow16°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. The Dovey's runs have declined alongside the wider Welsh pattern.
Where
Lower Dovey pool tails through to the Aberdyfi 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
Good — water clarity is working for you, but water temperature is the limiting factor today.
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 6 Uhr
Hatch predictions
Today's headline hatch shown — see all 12 active hatches hour by hour as a supporter.
Start free trial14-day free trial. Cancel anytime.
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 3 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
Trout seasonSeason
1
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 · Sea Trout
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.
8-12 · Streamer
Slim and mobile — fished sunk through the pool when surface work is not producing. Consistently takes fish that will not come to the surface.
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 Twymyn — Llanbrynmair AADay tickets
A Dyfi tributary through a scenic waterfall gorge near Dylife, joining the Dyfi near Cemmaes Road.
Visit official site ↗What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 7
Pont ar Ddyfi, the bridge over the Afon Dyfi (Dovey) at Machynlleth 
River Dyfi at Pont Minllyn, Dinas Mawddwy 
River Dovey from the A487 
The River Dyfi, Machynlleth 
River Dovey upstream of Pont ar Ddyfi 
Afon Dyfi near Machynlleth Terrain map
Water quality (WFD)
The full read · show the working · for Sea Trout · confidence 75%
How the river scores — hydrology factors
Water heightMedium Ideal+3.4
Recent riseNone0.0
Falling after liftFalling Slightly After Lift+3.4
Water temperatureCool To Moderate+3.5
Time in seasonLate Season+1.9
ClarityClearing+2.4
Hydrology base14.6
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 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. Mid Wales sea trout river with runs from June but stocks have declined as part of the wider Welsh pattern. Condition-sensitive — post-rain windows are the reliable opportunity.
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 Dyfi (Dovey) salmon and sewin runs have both declined sharply.
Related guides
Casting instructors near here
Booking & contacts
Dovey (Dyfi)
Water temperature for Sea Trout
Warm — slow16°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. The Dovey's runs have declined alongside the wider Welsh pattern.
Where
Lower Dovey pool tails through to the Aberdyfi 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
Good — water clarity is working for you, but water temperature is the limiting factor today.
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 6 Uhr
Hatch predictions
Today's headline hatch shown — see all 12 active hatches hour by hour as a supporter.
Start free trial14-day free trial. Cancel anytime.
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 3 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
Trout seasonSeason
1
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 · Sea Trout
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.
8-12 · Streamer
Slim and mobile — fished sunk through the pool when surface work is not producing. Consistently takes fish that will not come to the surface.
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 Twymyn — Llanbrynmair AADay tickets
A Dyfi tributary through a scenic waterfall gorge near Dylife, joining the Dyfi near Cemmaes Road.
Visit official site ↗What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 7
Pont ar Ddyfi, the bridge over the Afon Dyfi (Dovey) at Machynlleth River Dyfi at Pont Minllyn, Dinas Mawddwy River Dovey from the A487 The River Dyfi, Machynlleth River Dovey upstream of Pont ar Ddyfi Afon Dyfi near Machynlleth Terrain map
Water quality (WFD)
- Ecology: Good
- Chemical: Unknown
NRW (Wales) · UKGB110064048390
The full read · show the working · for Sea Trout · confidence 75%
How the river scores — hydrology factors
Water heightMedium Ideal+3.4
Recent riseNone0.0
Falling after liftFalling Slightly After Lift+3.4
Water temperatureCool To Moderate+3.5
Time in seasonLate Season+1.9
ClarityClearing+2.4
Hydrology base14.6
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 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. Mid Wales sea trout river with runs from June but stocks have declined as part of the wider Welsh pattern. Condition-sensitive — post-rain windows are the reliable opportunity.
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 Dyfi (Dovey) salmon and sewin runs have both declined sharply.
Related guides
Casting instructors near here
Booking & contacts