Stillwater · Ordovician Volcanics · Wales / Snowdonia (Ardudwy hills, Harlech)

Llyn Eiddew Mawr

View across the still blue water of Llyn Eiddew Mawr towards a rocky hillside in Snowdonia, North Wales.

Eiddew Mawr is the bigger sibling of the two Eiddew llyns, set in the same fold of hills above Talsarnau but with enough extra water to hold a slightly better stamp of wild brown trout.

Fair · Trout
Minkie · 6-10
Fairlive now
Good drifting conditions on Llyn Eiddew Mawr
Useful ripple, fishable wave. Worth a session if the wind holds.
55% confidence

Llyn Eiddew Mawr is often best in spring through autumn.

What moved it
  • WindNW 24 km/hModerate breeze · Gusts to 36 km/h
Today's fly
Minkie
Minkie6-10
Retrieve, sub-surface
Conditions on the water
Estimate
Wind
Moderate breeze · Gusts to 36 km/h
NW 24 km/h
N
NW
from the north-west
Wave40 cm chop
Water temp8.6°C
Air temp11°C
CloudBroken
Pressure1017 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 Trout
When
May–August; evening rise in settled weather
Where
Work a bushy searching pattern on the bob and drop a contrasting nymph on the point.
The plan
Plan A

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

Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.

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 as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 5 as a supporter.

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Through the year
0–3 scale · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Heather FlyHatch
2
2
Daddy Long LegsHatch
2
3
2
Claret DunHatch
2
3
2
Murrough (Great Red Sedge)Hatch
2
3
2

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

Ranked for today
Trout fly box
Bays & launches · 1
Day ticket via Artro & Talsarnau AAAccess varies
The larger of the two Eiddew llyns — unstocked wild browns, hill-lake bank fishing above Talsarnau with views toward the Dwyryd.
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What's coming
Plan ahead
5-day outlook
Condition match
72%
Cloud100%
Wind30%
Temp100%

A good match for Llyn Eiddew Mawr — most conditions are close to what it fishes best in.

Other water nearby · 5
Gallery · 2
  1. View across the still blue water of Llyn Eiddew Mawr towards a rocky hillside in Snowdonia, North Wales.
    Llyn Eiddew Mawr
  2. Terrain map of the venue
    Terrain map
About this water

Eiddew Mawr is the bigger sibling of the two Eiddew llyns, set in the same fold of hills above Talsarnau but with enough extra water to hold a slightly better stamp of wild brown trout. Still no stocking, still no boat — this is bank fishing on a hill lake, walking-boot country, the reward being as much the view back toward the Dwyryd as anything on the end of the line. The browns run small to middling but fight hard in water this cold and clean, and evenings with a light ripple are when the place actually starts to fish. Simple, unglamorous, and exactly what an Ardudwy upland llyn should be.

  • Lake
  • Ordovician volcanics
Why this score
  • Wind conditions (windy) are not ideal for this water.
  • Cloud cover (cloud) suits the fishery well.
  • Temperature (cool) is in the sweet spot for autumn fishing.
  • Buzzer is in its seasonal window, boosting the chance of targeted feeding.
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