Stillwater · Silurian Mudstone Shale · Wales / Cambrian Mountains (Rheidol), GB-WLS

Cwm Rheidol Reservoir

Cwm Rheidol Reservoir — Vale of Rheidol 260714_34
Fair · Trout
Minkie · 6-10
Fairlive now
Reasonable autumn fishing likely at Cwm Rheidol Reservoir
Useful ripple, fishable wave. Worth a session if the wind holds.
62% confidence

Cwm Rheidol Reservoir is often best in spring through autumn.

What moved it
  • WindSW 26 km/hModerate breeze
Today's fly
Minkie
Minkie6-10
Retrieve, sub-surface
Conditions on the water
Estimate
Wind
Moderate breeze
SW 26 km/h
N
SW
from the south-west
Wave60 cm wave
Water temp15.4°C
Air temp19°C
CloudOvercast
Pressure1014 hPa
Rain · recent0.0 mm

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

Head to
Wind driftW wind
Eastern end

A westerly has held for 7 hours, running warmer than the water (17°C air against 15°C water). Expect fish at the eastern end — the bank it is blowing into — where the drift piles food, colour and warmth together. This reads the upper water, though — a bottom bait at range feels it far less than a floater or a fish in the margins. Treat it as a tiebreaker between good swims rather than an override — features and angling pressure usually count for more.

How to fish it · for Trout
When
Late April–June; evening rises through summer
Where
Start with Minkie (6-10) — on the point. Early in the day, nymphs and buzzers fished slowly tend to outperform attractors.
The plan
Plan A

Start with Minkie (6-10) — on the point. Early in the day, nymphs and buzzers fished slowly tend to outperform attractors.

Plan B

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

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 3 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 · September 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 Fishing PassportAccess varies
Aberystwyth AA's largest water — a 25-hectare hydro reservoir on the Rheidol holding wild brown trout, with occasional sewin and salmon working up from the estuary.
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What's coming
Plan ahead
5-day outlook
Condition match
45%
Cloud50%
Wind30%
Temp60%

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

Other water nearby · 5
Gallery · 2
  1. Cwm Rheidol Reservoir — Vale of Rheidol 260714_34
    Vale of Rheidol 260714_34
  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.
Directions
Seasons & zones

Sea trout: Variable seasonal (2026)

Related guides
Casting instructors near here
Booking & contacts
Clubs & associations