Stillwater · Granite · Brittany / Finistère (Monts d'Arrée)

Lac Saint-Michel (Brennilis)

Lac Saint-Michel (Brennilis) — Lac de Brennilis

At 450 hectares in the heart of the Monts d'Arrée, Saint-Michel is a Grand Lac Intérieur — a big, open reservoir of stocked rainbow trout fished alongside resident pike and perch.

Fair · Rainbow
Wet-fly teams · 12–16
Fairlive now
Reasonable summer fishing likely at Lac Saint-Michel (Brennilis)
Good wave on — drift country. A useful wave. Work the productive shore.
58% confidence
What moved it
  • WindE 12 km/hGentle breeze
Today's fly
WF
Wet-fly teams12–16
A dependable searching pattern for these waters.
Conditions on the water
Live gauge
Wind
Gentle breeze
E 12 km/h
N
E
from the east
Wave20 cm ripple
Water temp
Air temp16°C
CloudClear
Pressure1021 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 Lac Saint-Michel (Brennilis). The ripple should help fish move and feed more confidently.
Where
Start with Wet-fly teams (12-14) on a slow, natural presentation — check locally for the preferred method. 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 Wet-fly teams (12-14) on a slow, natural presentation — check locally for the preferred method. 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

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

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Beyond the hatch · worth watchingambient prey

Hatch predictions

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Through the year
0–3 scale · July 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
Rainbow fly box
WF
Wet-fly teamsTop
12–16 · Fly
A dependable searching pattern for these waters.
LS
lures & streamers
8–10 · Streamer
Strip it for fish chasing fry or in coloured water.
BU
buzzers
10–14 · Buzzer
Static or slow on a long leader — the staple stillwater chironomid.
PP
perch/pike imitations for predators
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
64%
Cloud25%
Wind65%
Temp100%

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

Other water nearby · 5
Gallery · 2
  1. Lac Saint-Michel (Brennilis) — Lac de Brennilis
    Lac de Brennilis
  2. Terrain map of the venue
    Terrain map
About this water

At 450 hectares in the heart of the Monts d'Arrée, Saint-Michel is a Grand Lac Intérieur — a big, open reservoir of stocked rainbow trout fished alongside resident pike and perch. This is loch-style water: you fish the wind, the contours and the inflows rather than a pocket of stream. It carries its own lake regulations, separate from the spate rivers all around it, so read the Finistère rules before you launch.

  • Reservoir
  • Granite
Water quality (WFD)
  • EcologyUnknown
  • ChemicalUnknown
Why this score
  • Temperature (cool) is in the sweet spot for summer fishing.
  • Great Red Sedge 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