Reading the river for Tomorrow
A patient day. Fish the cover and stay with it.
Water temperature for Chub
Ideal16°C est.ideal 14–22°C
0°14°28°
How to fish it · for Chub
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
Good — water temperature is working for you, but water clarity is the limiting factor today.
Hatch timeline · tomorrowPeak at 12pm
12pm(now) — Heather Fly
Stage: Terrestrials on topApproach: Dry flyActivity: 67%
Also:Daddy Long Legs53%Cinnamon Sedge34%Autumn Dun33%
Peak emergence windowWeather boost10 food groups active
Peak activity at 12pm — Heather Fly (Heather Fly, Peak emergence window)
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 2 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
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
Chub fly box
Hook 8–10 weighted · Fly
in season · matches water height
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
Fishing better 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 Chub · confidence 65%
How the 63 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow30 × 22%6.6
Clarity30 × 18%5.4
Feeding Time80 × 13%10.4
Pressure80 × 7%5.6
Insect activity57 × 12%6.8
Conditions total= 63
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
A drop and clear would lift the flow and clarity scores.
Directions
Related guides
Casting instructors near here
Booking & contacts
Llynfi
Reading the river for Tomorrow
A patient day. Fish the cover and stay with it.
Water temperature for Chub
Ideal16°C est.ideal 14–22°C
0°14°28°
How to fish it · for Chub
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
Good — water temperature is working for you, but water clarity is the limiting factor today.
Hatch timeline · tomorrowPeak at 12pm
12pm(now) — Heather Fly
Stage: Terrestrials on topApproach: Dry flyActivity: 67%
Also:Daddy Long Legs53%Cinnamon Sedge34%Autumn Dun33%
Peak emergence windowWeather boost10 food groups active
Peak activity at 12pm — Heather Fly (Heather Fly, Peak emergence window)
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 2 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
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
Chub fly box
Hook 8–10 weighted · Fly
in season · matches water height
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
Fishing better 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 Chub · confidence 65%
How the 63 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow30 × 22%6.6
Clarity30 × 18%5.4
Feeding Time80 × 13%10.4
Pressure80 × 7%5.6
Insect activity57 × 12%6.8
Conditions total= 63
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
A drop and clear would lift the flow and clarity scores.
Directions
Related guides
Casting instructors near here
Booking & contacts