Stillwater · Silurian Mudstone Shale · Wales / Cambrian Mountains (Rheidol)

Cwm Rheidol Reservoir

Cwm Rheidol Reservoir — Vale of Rheidol 260714_34
Fair · Trout
Diawl Bach · 12-14
Fairlive now
Evening session looks promising at Cwm Rheidol Reservoir
Good wave on — drift country. A useful wave. Work the productive shore.
54% confidence
What moved it
  • WindNW 18 km/hGentle breeze
Today's fly
Diawl Bach
Diawl Bach12-14
Washing-line, sub-surface
Conditions on the water
Live gauge
Wind
Gentle breeze
NW 18 km/h
N
NW
from the north-west
Wave40 cm chop
Water temp
Air temp20°C
CloudBroken
Pressure1021 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for Trout
When
Late April–June; evening rises through summer
Where
Start with Diawl Bach (12-14) — on the bob / top dropper. Early in the day, nymphs and buzzers fished slowly tend to outperform attractors.
The plan
Plan A

Start with Diawl Bach (12-14) — on the bob / top dropper. Early in the day, nymphs and buzzers fished slowly tend to outperform attractors.

Plan B

If surface work dries up, try a diawl bach or hare's ear on the point and skate a sedge pattern on the bob at last light.

Watch for

Evening tends to be the best period in summer — stay late if you can for a sedge or spinner fall.

Either bank or boat

Good ripple suits both bank and boat. Bank: work inflows, dam walls, and points. Boat: broadside drift covering wind lanes.

Sub-surface · on the nymphunder the surface

Hatch predictions

See the full sub-surface read 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 · July 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
Trout fly box
Gammarus Scud (Olive)
Gammarus Scud (Olive)
10-14 · Gammarus Scud
Washing-line, sub-surface
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.
What's coming
Plan ahead
5-day outlook
Condition match
74%
Cloud100%
Wind65%
Temp60%

A good match for Cwm Rheidol Reservoir — most conditions are close to what it fishes best in.

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
  • Cloud cover (cloud) suits the fishery well.
  • Silverhorn is in its seasonal window, boosting the chance of targeted feeding.
Directions
Seasons & zones

Sea trout: Variable seasonal (2026)

Related guides
Booking & contacts