Stillwater · Old Red Sandstone · Wales / Brecon Beacons (Taff Valley), GB-WLS

Llwyn-on Reservoir

Llwyn-on Reservoir — Reflections
Fair · Rainbow
Minkie · 6-10
Fairlive now
Reasonable summer fishing likely at Llwyn-on Reservoir
Good wave on — drift country. A useful wave. Work the productive shore.
55% confidence

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

What moved it
  • Wind12 km/hGentle breeze
Today's fly
Minkie
Minkie6-10
Retrieve, sub-surface
Conditions on the water
Estimate
Wind
12 km/h
calmblown out
Wave20 cm ripple
Water temp19.7°C
Air temp20°C
CloudBroken
Pressure—
Rain · recent0.0 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

How to fish it · for Rainbow
When
Current conditions suit Llwyn-on Reservoir well for summer tactics. The ripple should help fish move and feed more confidently. Early morning is often the most productive window in summer — make the most of it.
Where
Start with Minkie (6-10) — on the point. Early in the day, try buzzers on a slow figure-of-eight or a booby on a fast-sink line near the bottom. Rainbows respond to more active retrieves — try short strips between pauses.
The plan
Plan A

Start with Minkie (6-10) — on the point. Early in the day, try buzzers on a slow figure-of-eight or a booby on a fast-sink line near 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

Sedge should come on through the afternoon as the water warms.

Bank

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

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 guilds with Pro.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 5 with Pro.

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

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
74%
Cloud100%
Wind65%
Temp60%

A good match for Llwyn-on Reservoir — most conditions are close to what it fishes best in.

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
  • Cloud cover (cloud) suits the fishery well.
  • Buzzer is in its seasonal window, boosting the chance of targeted feeding.
  • Reservoirs of this kind fish hard at this time of year.
Related guides
Big Stillwater Playbookreservoir tacticsReservoir Entomologymatching the hatchThermal Layers & Troutreading depth and temperature
Casting instructors near here
Booking & contacts
Clubs & associations