Stillwater · Old Red Sandstone · Wales / Brecon Beacons (Taff Valley)

Llwyn-on Reservoir

Llwyn-on Reservoir — Reflections
Fair · Rainbow
Marabou Damsel · 8-12
A respectable few hours, if you choose your moments
Good wave on — drift country. A useful wave. Work the productive shore.
49% confidence
limited data

Llwyn-on Reservoir is often best in spring through autumn.

What moved it
  • WindW 13 km/hGentle breeze
Today's fly
MD
Marabou Damsel8-12
Retrieve, sub-surface
Conditions on the water
Live gauge
Wind
Gentle breeze
W 13 km/h
N
W
from the west
Wave20 cm ripple
Water temp—
Air temp23°C
CloudOvercast
Pressure—
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for Rainbow
When
Conditions are not ideal but fishable at Llwyn-on Reservoir. The ripple should help fish move and feed more confidently.
Where
Start with Marabou Damsel (8-12) — on the point. Midday in warm weather — switch to a fast-sink or Di-7 and fish boobies or blobs along the bottom. Rainbows respond to more active retrieves — try short strips between pauses.
The plan
Plan A

Start with Marabou Damsel (8-12) — on the point. Midday in warm weather — switch to a fast-sink or Di-7 and fish boobies or blobs along the bottom. Rainbows respond to more active retrieves — try short strips between pauses.

Plan B

Fish early and late, try deeper during the heat of the day with a fast-sinking line.

Watch for

Evening tends to be the best period in summer — stay late if you can for a sedge or spinner fall.

Bank

Bank-only venue. Fish from accessible margins, points, weed edges, and inflows.

Sub-surface · on the nymphunder the surface

Hatch predictions

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Beyond the hatch · worth watchingambient prey

Hatch predictions

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Through the year
0–3 scale · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Daphnia SwarmHatch
2
3
3
3
2
Daddy Long LegsHatch
2
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.

Ranked for today
Rainbow fly box
Bays & launches · 1
Llwyn-on Reservoir — day ticket via Fishing PassportAccess varies
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.
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What's coming
Plan ahead
5-day outlook
Condition match
59%
Cloud50%
Wind65%
Temp60%

A reasonable day here, though cloud isn't quite in the sweet spot.

Other water nearby · 5
Beacons Reservoir
7.0 km
Brown trout · Rainbow trout
Afon Cynon
9.0 km
Brown trout
Llyn Cwm Llwch
10 km
Brown trout
Talybont Reservoir
11 km
Brown trout
Bargoed Park
17 km
Brown trout · Rainbow trout
Gallery · 2
  1. Llwyn-on Reservoir — Reflections
    Reflections
  2. Terrain map of the venue
    Terrain map
Why this score
  • Buzzers are in their seasonal window, boosting the chance of targeted feeding.
Related guides
Big Stillwater Playbookreservoir tacticsReservoir Entomologymatching the hatchThermal Layers & Troutreading depth and temperature
Casting instructors near here
Booking & contacts