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
How to fish it · for Rainbow
When
Conditions are not ideal but fishable at Siblyback Lake. Flat calm means fish may be spookier — longer leaders and subtler flies will help.
Where
Start with Minkie (6-10) — on the point. 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.
The plan
Plan A
Start with Minkie (6-10) — on the point. 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.
Plan B
Slow down everything. A booby on a fast-sinking line, left static, can pick up deep fish.
Watch for
Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.
Bank
Flat calm suits bank fishing near features — points, weed beds, and inflows where fish patrol.
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.
Start free trial14-day free trial. Cancel anytime.
Through the year
0–3 scale · November highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
2
2
2
2
1
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.
Buzzer team todayfor the conditions now
Point#10
Bloodworm
Not in this water's box
How to fish it
Slow-sink line · slow figure-of-eight, pausing to let the flies hang
Fly recommendations
Point fly shown — supporters see the whole team, sizes and why.
Start free trial14-day free trial. Cancel anytime.
Ranked for today
Rainbow fly box
What's coming
Plan ahead
5-day outlook
Condition match
52%
Cloud25%
Wind65%
Temp60%
A reasonable day here, though cloud isn't quite in the sweet spot.
Other water nearby · 5
Gallery · 3
Siblyback 
Siblyback Terrain map
About this water
Why this score
- winter conditions with clear skies and calm wind.
- Reservoirs of this kind fish hard at this time of year.
Directions
Seasons & zones
- Trout 28 February → 31 December
Related guides
Casting instructors near here
Booking & contacts
Permits & access
Boards & regulators
Siblyback Lake
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.
How to fish it · for Rainbow
When
Conditions are not ideal but fishable at Siblyback Lake. Flat calm means fish may be spookier — longer leaders and subtler flies will help.
Where
Start with Minkie (6-10) — on the point. 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.
The plan
Plan A
Start with Minkie (6-10) — on the point. 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.
Plan B
Slow down everything. A booby on a fast-sinking line, left static, can pick up deep fish.
Watch for
Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.
Bank
Flat calm suits bank fishing near features — points, weed beds, and inflows where fish patrol.
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 2 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Top prey shown — see all 5 as a supporter.
Start free trial14-day free trial. Cancel anytime.
Through the year
0–3 scale · November highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
2
2
2
2
1
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.
Buzzer team todayfor the conditions now
Point#10
Bloodworm
Not in this water's box
How to fish it
Slow-sink line · slow figure-of-eight, pausing to let the flies hang
Fly recommendations
Point fly shown — supporters see the whole team, sizes and why.
Start free trial14-day free trial. Cancel anytime.
Ranked for today
Rainbow fly box
What's coming
Plan ahead
5-day outlook
Condition match
52%
Cloud25%
Wind65%
Temp60%
A reasonable day here, though cloud isn't quite in the sweet spot.
Other water nearby · 5
Gallery · 3
Siblyback Siblyback Terrain map
About this water
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
- winter conditions with clear skies and calm wind.
- Reservoirs of this kind fish hard at this time of year.
Directions
Seasons & zones
- Trout 28 February → 31 December
Related guides
Casting instructors near here
Booking & contacts
Permits & access
Boards & regulators
At a glance
Siblyback Lake is a reservoir in South West / Cornwall, England. Its recorded elevation is about 220 m above sea level and the catchment geology is granite. Our data lists brown trout and rainbow trout here. The trout season is recorded as running from 28 February to 31 December. Best window recorded for anglers: April–June. Core methods listed: Boat drifting; bank fishing. Nearby waters in our listings include Colliford Lake at 6.0 km, Temple Trout Fishery at 9.0 km and Rose Park Fishery at 10 km.