Stillwater · Mixed · Anglesey, North Wales

Llyn Alaw

Shoreline view across the still open water of Llyn Alaw reservoir on Anglesey, with reeds and a bankside bush in the foreground and low hills on the far shore.
Fair · Rainbow
Coch-y-Bonddu Beetle · 10-14
A respectable few hours, if you choose your moments
Useful ripple, fishable wave. Worth a session if the wind holds.
49% confidence
limited data

Llyn Alaw is often best in spring through autumn.

What moved it
  • WindN 27 km/hModerate breeze
Today's fly
Coch-y-Bonddu Beetle
Coch-y-Bonddu Beetle10-14
Upstream dry, on top
Conditions on the water
Estimate
Wind
Moderate breeze
N 27 km/h
N
N
from the north
Wave60 cm wave
Water temp—
Air temp14°C
CloudClear
Pressure1022 hPa
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
Conditions are not ideal but fishable at Llyn Alaw. Early morning is often the most productive window in summer — make the most of it.
Where
Start with Daddy Long Legs (10-12) on a As per local method. Evening can produce explosive surface takes — try a foam beetle or booby on a long leader. Rainbows respond to more active retrieves — try short strips between pauses.
The plan
Plan A

Start with Daddy Long Legs (10-12) on a As per local method. Evening can produce explosive surface takes — try a foam beetle or booby on a long leader. Rainbows respond to more active retrieves — try short strips between pauses.

Plan B

If the daddy is being refused, drop to a hopper or a single foam beetle and cover rising fish individually.

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 4 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
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

No confirmed current fishery operator. Contact Dŵr Cymru Welsh Water's North Wales reservoirs office before planning a trip.

Fishery status — currently closedMembers-only
Welsh Water suspended fishing here around 2012-13 pending a management retender that appears never to have concluded.
Visit official site ↗
What's coming
Plan ahead
5-day outlook
Condition match
38%
Cloud25%
Wind30%
Temp60%

Conditions are away from Llyn Alaw's sweet spot — it usually fishes best in ripple wind with cloud skies.

Other water nearby · 5
Llyn Cefni Reservoir
10 km
Brown trout · Rainbow trout
Llyn Coron
17 km
Brown trout · Rainbow trout
Llyn Padarn
32 km
Brown trout · Arctic char
Llyn Cwm Dwythwch
34 km
Brown trout
Llyn Cwellyn
36 km
Brown trout · Arctic char · Salmon
Gallery · 2
  1. Shoreline view across the still open water of Llyn Alaw reservoir on Anglesey, with reeds and a bankside bush in the foreground and low hills on the far shore.
    Southern end of Llyn Alaw Reservoir
  2. Terrain map of the venue
    Terrain map
Why this score
  • Wind conditions (windy) are not ideal for this water.
  • Daddy Longlegs 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