- Ecology: Unknown
- Chemical: Unknown
Rules at a glance
- Permit required
- Fly only
Head to
Wind driftSW wind
North-eastern end
A southwesterly has held for 10 hours at much the same temperature as the 15°C water. No thermal steer either way, but the drift still stacks food against the north-eastern end — the bank it is blowing into — so start there. 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 Rainbow
When
Conditions are not ideal but fishable at Lac Saint-Michel (Brennilis). Warmer water may push fish deeper — try sinking lines or deeper nymphing.
Where
Start with Viva (10-12) on a figure-of-eight with occasional strip. Early in the day, try buzzers on a slow figure-of-eight or a booby on a fast-sink line near the bottom. Rainbows respond to more active retrieves — try short strips between pauses.
The plan
Plan A
Start with Viva (10-12) on a figure-of-eight with occasional strip. Early in the day, try buzzers on a slow figure-of-eight or a booby on a fast-sink line near the bottom. Rainbows respond to more active retrieves — try short strips between pauses.
Plan B
A fry-imitating pattern stripped through the margins can save a blank in autumn.
Watch for
Buzzer may strengthen through the middle of the day as conditions warm.
Bank, sheltered shores
In wind, bank fish the lee shore — boats can anchor in productive areas if conditions allow.
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 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 · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Reservoir BuzzerHatch
2
3
3
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.
Ranked for today
Fly box · Rainbow
Top
12–16 · Fly
A dependable searching pattern for these waters.
8–10 · Streamer
Strip it for fish chasing fry or in coloured water.
10–14 · Buzzer
Static or slow on a long leader — the staple stillwater chironomid.
12–16 · Fly
A dependable searching pattern for these waters.
Permits & access
Permit required — see local rules.
- Grand Lac Intérieur
- Carte de pêche plus lake-specific rules.
What's coming
Plan ahead
5-day outlook
Condition match
35%
Cloud50%
Wind30%
Temp25%
Conditions are away from Lac Saint-Michel (Brennilis)'s sweet spot — it usually fishes best in ripple wind with cloud skies.
Other water nearby · 5
Gallery · 2
Lac de Brennilis Terrain map
Water quality (WFD)
Why this score
- Wind conditions (windy) are not ideal for this water.
- Buzzer is in its seasonal window, boosting the chance of targeted feeding.
Directions
Seasons & zones
- Trout Year-round (lake-specific rules) → Year-round (lake-specific rules)
Related guides
Booking & contacts
Lac Saint-Michel (Brennilis)
Head to
Wind driftSW wind
North-eastern end
A southwesterly has held for 10 hours at much the same temperature as the 15°C water. No thermal steer either way, but the drift still stacks food against the north-eastern end — the bank it is blowing into — so start there. 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 Rainbow
When
Conditions are not ideal but fishable at Lac Saint-Michel (Brennilis). Warmer water may push fish deeper — try sinking lines or deeper nymphing.
Where
Start with Viva (10-12) on a figure-of-eight with occasional strip. Early in the day, try buzzers on a slow figure-of-eight or a booby on a fast-sink line near the bottom. Rainbows respond to more active retrieves — try short strips between pauses.
The plan
Plan A
Start with Viva (10-12) on a figure-of-eight with occasional strip. Early in the day, try buzzers on a slow figure-of-eight or a booby on a fast-sink line near the bottom. Rainbows respond to more active retrieves — try short strips between pauses.
Plan B
A fry-imitating pattern stripped through the margins can save a blank in autumn.
Watch for
Buzzer may strengthen through the middle of the day as conditions warm.
Bank, sheltered shores
In wind, bank fish the lee shore — boats can anchor in productive areas if conditions allow.
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 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 · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Reservoir BuzzerHatch
2
3
3
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.
Ranked for today
Fly box · Rainbow
Top
12–16 · Fly
A dependable searching pattern for these waters.
8–10 · Streamer
Strip it for fish chasing fry or in coloured water.
10–14 · Buzzer
Static or slow on a long leader — the staple stillwater chironomid.
12–16 · Fly
A dependable searching pattern for these waters.
Permits & access
Permit required — see local rules.
- Grand Lac Intérieur
- Carte de pêche plus lake-specific rules.
What's coming
Plan ahead
5-day outlook
Condition match
35%
Cloud50%
Wind30%
Temp25%
Conditions are away from Lac Saint-Michel (Brennilis)'s sweet spot — it usually fishes best in ripple wind with cloud skies.
Other water nearby · 5
Gallery · 2
Lac de Brennilis Terrain map
Water quality (WFD)
- Ecology: Unknown
- Chemical: Unknown
Why this score
- Wind conditions (windy) are not ideal for this water.
- Buzzer is in its seasonal window, boosting the chance of targeted feeding.
Directions
Seasons & zones
- Trout Year-round (lake-specific rules) → Year-round (lake-specific rules)
Related guides
Booking & contacts