Stillwater · Granite · South West / Cornwall

Siblyback Lake

Siblyback Lake venue image
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A Bodmin Moor reservoir at the edge of the moor, smaller and more sheltered than Colliford but with genuine upland character — clear granite-filtered water, a population of resident wild browns alongside the stocked rainbows, and a landscape that rewards the visit as much as the fishing.

Fair · Rainbow
Diawl Bach · 12-14
Fairlive now
Good summer conditions for Siblyback Lake
Good wave on — drift country. A useful wave. Work the productive shore.
64% confidence

Peak season here starts around September — worth planning ahead.

What moved it
  • WindNW 17 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 17 km/h
N
NW
from the north-west
Wave20 cm ripple
Water temp—
Air temp14°C
CloudBroken
Pressure1024 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for rainbow
When
Conditions are not ideal but fishable at Siblyback Lake. The ripple should help fish move and feed more confidently.
Where
Start with Booby (8-10) on a fast strip on floating line or static on sinking. Rainbows respond to more active retrieves — try short strips between pauses. If that does not produce, switch depth or speed before changing the pattern entirely. In the ripple, a bushy searching dry (Hopper, Shipman's, Elk Hair Caddis) outperforms flush emergers — it stays visible and holds the surface tension.
The plan
Plan A

Start with Booby (8-10) on a fast strip on floating line or static on sinking. Rainbows respond to more active retrieves — try short strips between pauses. If that does not produce, switch depth or speed before changing the pattern entirely. In the ripple, a bushy searching dry (Hopper, Shipman's, Elk Hair Caddis) outperforms flush emergers — it stays visible and holds the surface tension.

Plan B

If the main plan stalls, drop to a size 14–16 midge — switch to a washing-line or suspender rig and change drift line before you change food group.

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.

Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
1
Daphnia SwarmHatch
2
3
3
3
2
Daddy Long LegsHatch
2
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
What's coming
Plan ahead
5-day outlook
Condition match
65%
Cloud70%
Wind65%
Temp60%

A reasonable day here, though temperature isn't quite in the sweet spot.

Other water nearby · 5
Colliford Lake
6.0 km
Brown trout · Rainbow trout
Temple Trout Fishery
9.0 km
Brown trout · Rainbow trout
Crowdy Reservoir
9.0 km
Brown trout
Rose Park Fishery
10 km
Rainbow trout · Brown trout · Grayling
Innis Fly Fishery
24 km
Rainbow trout · Brown trout · Blue trout
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

A Bodmin Moor reservoir at the edge of the moor, smaller and more sheltered than Colliford but with genuine upland character — clear granite-filtered water, a population of resident wild browns alongside the stocked rainbows, and a landscape that rewards the visit as much as the fishing. May and June bring a reliable beetle fall onto the surface; pre-book a Coulam boat by 3pm the day before to cover the drift lines the bank can't reach. Stocked and managed by South West Lakes Trust.

  • Reservoir
  • Granite
Why this score
  • Buzzer is in its seasonal window, boosting the chance of targeted feeding.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout1 April → 30 September
Related guides
Big Stillwater Playbookreservoir tacticsReservoir Entomologymatching the hatchThermal Layers & Troutreading depth and temperature
Booking & contacts