Water temperature for European Perch
Cool — slow12°C est.ideal 12–20°C
0°14°28°
How to fish it · for European Perch
Where
A Black Mountains spate stream — the Llynfi and its own tributary the Llynfi Dulas — running off Old Red Sandstone ground down through Talgarth to join the…
Why this works
Very poor — water temperature is working for you, but river flow is the limiting factor today.
Likely species
Stoneflies
Gammarids
Hatch timeline · tomorrowPeak at 18 Uhr
12 Uhr(now) — Autumn Needle Fly
Stage: Creeping nymphsApproach: Heavy nymphActivity: 78%
Also:Autumn Olive48%Daddy Long Legs38%
Peak emergence windowWeather boost9 food groups active
Peak activity at 18 Uhr — Caperer (Caperer, Weather boost)
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 2 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Supporters see what else is on the menu.
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 · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
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 · European Perch
Beats · 4 · 1 reaches
Llynfi beats — Fishing Passport · 4 beatsDay rods
Llynfi Dulas — Lower, Llynfi Dulas — Middle, Talgarth, Pontithel
The 4 beats
Llynfi Dulas — LowerDay tickets
Wye & Usk Foundation (Fishing Passport — Wild Streams)
1.25 miles from the Llynfi confluence up to Tregunter Farm — short, overgrown single (right) bank near the start, opening to double bank past a caravan park. One of the highest trout densities of any Wye tributary. Spectacular mayfly hatch. 2 fish/rod limit, sub-9in returned.
Wild Stream pre-booking or Season Permit.
Visit official site ↗Llynfi Dulas — MiddleDay tickets
Wye & Usk Foundation (Fishing Passport — Wild Streams)
Over 1 mile of single-bank Llynfi Dulas from Tregunter Farm up to Pont-y-Bat bridge — part of over 4 miles of Wild Streams access on the Llynfi and Llynfi Dulas combined, plus a further mile of Llynfi via the Booking Office.
Wild Stream pre-booking or Season Permit. Chest waders really required.
Visit official site ↗TalgarthDay tickets
Wye & Usk Foundation (Fishing Passport — Wild Streams)
~1 mile mixed double/single-bank River Llynfi near Talgarth, extended in 2019 below Bronllys Castle bridge. The widest species list of any Wild Streams beat — wild brown trout plus grayling, chub and shoals of perch.
Wild Stream pre-booking or Season Permit. Full C&R, mandatory online catch return.
Visit official site ↗PontithelDay tickets
Wye & Usk Foundation (Fishing Passport — Wild Streams)
~0.75 mile double-bank River Llynfi, 2 miles upstream of the Llynfi/Wye confluence, near Pontithel. Trout and grayling, with some large fish present; a dedicated Winter Grayling ticket is also sold.
Wild Stream pre-booking or Season Permit. Felt/studded soles necessary despite straightforward wading.
Visit official site ↗What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
The Afon Llynfi near Pontithel, Powys, flowing through the Wye valley countryside. Terrain map
The full read · show the working · for European Perch · confidence 62%
Perfect · stillwater comfort — temperature and low-light led
Water temperatureWater temp 13°C — prime band for european perch.
FlowFlow not a major driver — focus on temperature and clarity.
LightOvercast helps — low light is the species preference.
SeasonPrime month for this species.
Water clarityClarity very coloured — accounted for via spook-risk.
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Wyeproxy
Directions
Related guides
Casting instructors near here
Booking & contacts
Boards & regulators
Llynfi
Water temperature for European Perch
Cool — slow12°C est.ideal 12–20°C
0°14°28°
How to fish it · for European Perch
Where
A Black Mountains spate stream — the Llynfi and its own tributary the Llynfi Dulas — running off Old Red Sandstone ground down through Talgarth to join the…
Why this works
Very poor — water temperature is working for you, but river flow is the limiting factor today.
Likely species
Hatch timeline · tomorrowPeak at 18 Uhr
12 Uhr(now) — Autumn Needle Fly
Stage: Creeping nymphsApproach: Heavy nymphActivity: 78%
Also:Autumn Olive48%Daddy Long Legs38%
Peak emergence windowWeather boost9 food groups active
Peak activity at 18 Uhr — Caperer (Caperer, Weather boost)
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 2 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Supporters see what else is on the menu.
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 · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
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 · European Perch
Beats · 4 · 1 reaches
Llynfi beats — Fishing Passport · 4 beatsDay rods
Llynfi Dulas — Lower, Llynfi Dulas — Middle, Talgarth, Pontithel
The 4 beats
Llynfi Dulas — LowerDay tickets
Wye & Usk Foundation (Fishing Passport — Wild Streams)
1.25 miles from the Llynfi confluence up to Tregunter Farm — short, overgrown single (right) bank near the start, opening to double bank past a caravan park. One of the highest trout densities of any Wye tributary. Spectacular mayfly hatch. 2 fish/rod limit, sub-9in returned.
Wild Stream pre-booking or Season Permit.
Visit official site ↗Llynfi Dulas — MiddleDay tickets
Wye & Usk Foundation (Fishing Passport — Wild Streams)
Over 1 mile of single-bank Llynfi Dulas from Tregunter Farm up to Pont-y-Bat bridge — part of over 4 miles of Wild Streams access on the Llynfi and Llynfi Dulas combined, plus a further mile of Llynfi via the Booking Office.
Wild Stream pre-booking or Season Permit. Chest waders really required.
Visit official site ↗TalgarthDay tickets
Wye & Usk Foundation (Fishing Passport — Wild Streams)
~1 mile mixed double/single-bank River Llynfi near Talgarth, extended in 2019 below Bronllys Castle bridge. The widest species list of any Wild Streams beat — wild brown trout plus grayling, chub and shoals of perch.
Wild Stream pre-booking or Season Permit. Full C&R, mandatory online catch return.
Visit official site ↗PontithelDay tickets
Wye & Usk Foundation (Fishing Passport — Wild Streams)
~0.75 mile double-bank River Llynfi, 2 miles upstream of the Llynfi/Wye confluence, near Pontithel. Trout and grayling, with some large fish present; a dedicated Winter Grayling ticket is also sold.
Wild Stream pre-booking or Season Permit. Felt/studded soles necessary despite straightforward wading.
Visit official site ↗What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
The Afon Llynfi near Pontithel, Powys, flowing through the Wye valley countryside. Terrain map
The full read · show the working · for European Perch · confidence 62%
Perfect · stillwater comfort — temperature and low-light led
Water temperatureWater temp 13°C — prime band for european perch.
FlowFlow not a major driver — focus on temperature and clarity.
LightOvercast helps — low light is the species preference.
SeasonPrime month for this species.
Water clarityClarity very coloured — accounted for via spook-risk.
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Wyeproxy
Directions
Related guides
Casting instructors near here
Booking & contacts
Boards & regulators