Llwyn-on is the largest of the three Taff reservoirs at a hundred and fifty acres and the most accommodating — fly, spinner or worm all permitted, which makes it a favourite with local anglers and a good water to bring a beginner to. Stocked with rainbows and browns; the bag-limit permits run four or six fish. Bookable by day-ticket through the Fishing Passport. The Taff valley setting is broad and pastoral rather than dramatic, but the fish are honest and the access is straightforward.
A patient day, if you fancy it
Good wave on — drift country. Take your time — read the water before you cast.
42% confidence — limited data
Live now
Conditions on the water
Trends shown where the gauge supports them
Wind
SW 15 km/h
Gentle breeze
Wave
20 cm ripple
Water temp
—
No reading
Air temp
11°C
Cloud
Overcast
Pressure
1017 hPa
Rain · 24h
0.0 mm
No rain
Some readings unavailable — check directly before fishing.
How to fish · for brown trout
The brief
When · where · method · kit
How to fish it · for brown trout
When
The buzzer is on. Sedge may also come into play as the day warms. Drift conditions look good — cover the wind lanes.
Where
Set up a broadside drift and cover the water systematically. Work Pheasant Tail Nymph on the bob and Diawl Bach on the point.
Method
Method not yet authored.
Kit
Kit not yet authored.
Today's tactical plan
The plan
Plan A · Plan B · what to watch · bank or boat
The plan
Plan A
Set up a broadside drift and cover the water systematically. Work Pheasant Tail Nymph on the bob and Diawl Bach on the point.
Plan B
If the main plan is not working, switch to a smaller, more imitative pattern fished slower and deeper. A change of drift angle can also make a difference.
Watch for
Evening tends to be the best period in summer — stay late if you can for a sedge or spinner fall.
Boat — drift
A gentle ripple is ideal for drifting — broadside drift covering the wind lanes should be productive.
Hatches & runs
What's on, when
Twelve months at a glance
Through the year
0–3 scale · June highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Reservoir BuzzerHatch
2
3
3
3
3
3
2
Lake OliveHatch
2
3
3
3
3
3
2
Silverhorns & LonghornsHatch
1
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Today's fly · curated pack
Top pattern + the box
6 patterns from this venue's curated pack
Evidence
Why today scores what it does
The factors driving today's verdict
Why this score
- Buzzer is in its seasonal window, boosting the chance of targeted feeding.
Access · 1
Check the current rules, permits and access before travelling.
Llwyn-on Reservoir — day ticket via Fishing PassportWelsh Water / Dŵr Cymru (via Fishing Passport)
Stocked rainbow troutBrown troutFlySpinWorm
The largest of the three Taff Valley reservoirs at 150 acres — bookable on the Fishing Passport with day-ticket bag limits of four or six fish, or a junior two-fish permit. Fly, spinner and worm all permitted. Forty rods a day, which on a 150-acre water leaves plenty of room.
Day permit £18 (4-fish), £23 (6-fish), £9 junior 2-fish. Max 40 rods/day. EA rod licence required.
Arrange access →About this water · Lough note · 4 min read
About this water
Llwyn-on Reservoir, on the water
Field guide · contributor-editedLlwyn-on Reservoir · about
What this water is
Background · character · contributors
About this water
Llwyn-on is the largest of the three Taff reservoirs at a hundred and fifty acres and the most accommodating — fly, spinner or worm all permitted, which makes it a favourite with local anglers and a good water to bring a beginner to. Stocked with rainbows and browns; the bag-limit permits run four or six fish. Bookable by day-ticket through the Fishing Passport. The Taff valley setting is broad and pastoral rather than dramatic, but the fish are honest and the access is straightforward.
- Reservoir
- Old red sandstone
Llwyn-on Reservoir · directions
How to get to the water
Directions
Llwyn-on Reservoir
Google Places
Llwyn-on is the largest of the three Taff reservoirs at a hundred and fifty acres and the most accommodating — fly, spinner or worm all permitted, which makes it a favourite with local anglers and a good water to bring a beginner to.
Species
A patient day, if you fancy it
Good wave on — drift country. Take your time — read the water before you cast.
42% confidence — limited data
Conditions
Wind
SW 15 km/h
Gentle breeze
Wave
20 cm ripple
Water temp
—
No reading
Air temp
11°C
Cloud
Overcast
Pressure
1017 hPa
Rain · 24h
0.0 mm
No rain
Some readings unavailable — check directly before fishing.
Condition match
54%
Cloud70%
Wind65%
Temp25%
A reasonable day here, though temperature isn't quite in the sweet spot.
How to fish it · for brown trout
When
The buzzer is on. Sedge may also come into play as the day warms. Drift conditions look good — cover the wind lanes.
Where
Set up a broadside drift and cover the water systematically. Work Pheasant Tail Nymph on the bob and Diawl Bach on the point.
Method
Method not yet authored.
Kit
Kit not yet authored.
The plan
Plan A
Set up a broadside drift and cover the water systematically. Work Pheasant Tail Nymph on the bob and Diawl Bach on the point.
Plan B
If the main plan is not working, switch to a smaller, more imitative pattern fished slower and deeper. A change of drift angle can also make a difference.
Watch for
Evening tends to be the best period in summer — stay late if you can for a sedge or spinner fall.
Boat — drift
A gentle ripple is ideal for drifting — broadside drift covering the wind lanes should be productive.
Why this score
- Buzzer is in its seasonal window, boosting the chance of targeted feeding.
Through the year
0–3 scale · June highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Reservoir BuzzerHatch
2
3
3
3
3
3
2
Lake OliveHatch
2
3
3
3
3
3
2
Silverhorns & LonghornsHatch
1
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Gallery · 1
Terrain map
Access · 1
Check the current rules, permits and access before travelling.
Llwyn-on Reservoir — day ticket via Fishing PassportWelsh Water / Dŵr Cymru (via Fishing Passport)
Stocked rainbow troutBrown troutFlySpinWorm
The largest of the three Taff Valley reservoirs at 150 acres — bookable on the Fishing Passport with day-ticket bag limits of four or six fish, or a junior two-fish permit. Fly, spinner and worm all permitted. Forty rods a day, which on a 150-acre water leaves plenty of room.
Day permit £18 (4-fish), £23 (6-fish), £9 junior 2-fish. Max 40 rods/day. EA rod licence required.
Arrange access →Directions
About this water
Llwyn-on is the largest of the three Taff reservoirs at a hundred and fifty acres and the most accommodating — fly, spinner or worm all permitted, which makes it a favourite with local anglers and a good water to bring a beginner to. Stocked with rainbows and browns; the bag-limit permits run four or six fish. Bookable by day-ticket through the Fishing Passport. The Taff valley setting is broad and pastoral rather than dramatic, but the fish are honest and the access is straightforward.
- Reservoir
- Old red sandstone
About this water · Lough note · 4 min read
Llwyn-on is the largest of the three Taff reservoirs at a hundred and fifty acres and the most accommodating — fly, spinner or worm all permitted, which makes it a favourite with local anglers and a good water to bring a beginner to. Stocked with rainbows and browns; the bag-limit permits run four or six fish. Bookable by day-ticket through the Fishing Passport. The Taff valley setting is broad and pastoral rather than dramatic, but the fish are honest and the access is straightforward.
Other water nearby · 5