Stillwater · Mixed · Mid Wales / Carmarthenshire

Llyn Brianne

Llyn Brianne Reservoir from the western shore, open water toward the spillway with Tywi Forest on the far hillside.
Fair · Rainbow
Coch-y-Bonddu Beetle · 10-14
Fairlive now
Good drifting conditions on Llyn Brianne
Good wave on — drift country. A useful wave. Work the productive shore.
63% confidence

Llyn Brianne is often best in spring through autumn.

What moved it
  • WindW 11 km/hLight breeze
Today's fly
CY
Coch-y-Bonddu Beetle10-14
Upstream dry, on top
Conditions on the water
Live gauge
Wind
Light breeze
W 11 km/h
N
W
from the west
Wave20 cm ripple
Water temp—
Air temp17°C
CloudOvercast
Pressure—
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for Rainbow
When
The daddy longlegs are on. Buzzer may also come into play as the day warms. The ripple is helpful — fish should move onto the feed and a slow-drifted team or single wet will cover water well.
Where
Set up a broadside drift and cover the water systematically. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point.
The plan
Plan A

Set up a broadside drift and cover the water systematically. Work a bushy searching pattern on the bob and drop a contrasting nymph 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

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

Boat — drift

A gentle ripple is ideal for drifting — broadside drift covering the wind lanes should be productive.

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

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
Daddy Long LegsHatch
2
3
2
Murrough (Great Red Sedge)Hatch
2
3
2
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Lake OliveHatch
1
2
2
2
2
2
1

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Rainbow fly box
What's coming
Plan ahead
5-day outlook
Condition match
85%
Cloud50%
Wind100%
Temp100%

Conditions are ideal for Llyn Brianne — wind, cloud and temperature all line up.

Other water nearby · 5
Llyn Berwyn
13 km
Brown trout
Llyn Carw
15 km
Brown trout
Usk Reservoir
17 km
Brown trout · Rainbow trout
Springwater Lakes
18 km
Brown trout · Rainbow trout
Llyn Gynon
19 km
Brown trout
Gallery · 5
  1. Llyn Brianne Reservoir from the western shore, open water toward the spillway with Tywi Forest on the far hillside.
    Llyn Brianne Reservoir
  2. View across the Afon Tywi arm of Llyn Brianne toward the dense Tywi Forest on the far shore.
    Llyn Brianne — the Tywi arm
  3. Broad landscape view of Llyn Brianne Reservoir looking north, open water in the foreground and moorland and woodland rising around.
    Llyn Brianne Reservoir
  4. Wide panoramic view of Llyn Brianne reservoir on a clear day, forested hills descending to the water.
    Llyn Brianne panorama
  5. Terrain map of the venue
    Terrain map
Why this score
  • Wind conditions (ripple) closely match what this water fishes best in.
  • Temperature (cool) is in the sweet spot for summer fishing.
  • Daddy Longlegs are in their seasonal window, boosting the chance of targeted feeding.
Related guides
Thermal Layers & Troutreading depth and temperatureEuro Nymphingsubsurface methods
Casting instructors near here
Booking & contacts