Stillwater · Granite · Brittany / Morbihan (Colpo), FR

Parc Er Bihan (Colpo)

Parc Er Bihan (Colpo) terrain map

A small, 1.

Fair · Rainbow
Buzzers · 10–14
New ruleReported 19 Aug 2026

Severe drought restrictions (crise) in force

The surface-water zone "Littoral" (dépt 56) is at crise, the highest French drought tier, under a préfectoral arrêté. Fishing itself is not named in the restriction, but flows are low enough for the state to restrict water use — expect thin, warm water and check locally before travelling.

Arrêté préfectoral n°37757

Temporary notices from official orders and recent fishery reports — they clear automatically once out of date. Always confirm locally before travelling.

Fairlive now
Reasonable autumn fishing likely at Parc Er Bihan (Colpo)
Water temperature is the limiting factor today, not the wave. Fish dawn or dusk if you go at all, and handle everything with extra care.
59% confidence

Parc Er Bihan (Colpo) is often best in spring through autumn.

What moved it
  • WindSW 14 km/hGentle breeze
Today's fly
BU
Buzzers10–14
Static or slow on a long leader — the staple stillwater chironomid.
Conditions on the water
Estimate
Wind
Gentle breeze
SW 14 km/h
N
SW
from the south-west
Wave20 cm ripple
Water temp17.5°C
Air temp22°C
CloudOvercast
Pressure1022 hPa
Rain · recent0.0 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

How to fish it · for Rainbow
When
March–June, then September
Where
Start with Buzzers (12-14) on a slow, natural presentation — check locally for the preferred method. 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 Buzzers (12-14) on a slow, natural presentation — check locally for the preferred method. 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

Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.

Bank

Bank-only venue. Fish from accessible margins, points, weed edges, and inflows.

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 guilds with Pro.

Start free trial

14-day free trial. Cancel anytime.

Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 5 with Pro.

Start free trial

14-day free trial. Cancel anytime.

Through the year
0–3 scale · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
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

Closer to wild-lake trout fishing than to competition réservoirs. More room for naturals, caddis, buzzer, terrestrial and modest lure use.

BU
BuzzersTop
10–14 · Buzzer
Static or slow on a long leader — the staple stillwater chironomid.
SN
small nymphs
14–16 · Nymph
Search the runs and pockets, dead-drift near the bottom.
DR
dries
12–16 · Fly
A dependable searching pattern for these waters.
Permits & access
Permit required — see local rules.
  • Carte de pêche
  • Small association fly reservoir.
What's coming
Plan ahead
5-day outlook
Condition match
49%
Cloud50%
Wind65%
Temp25%

Conditions are away from Parc Er Bihan (Colpo)'s sweet spot — it usually fishes best in ripple wind with cloud skies.

Water here around 18°C. Nothing cooler within range — carry a thermometer.
About this water

A small, 1.7-hectare still water created by the Colpo AAPPMA in the Morbihan and stocked with rainbow trout for fly fishing. It is a tidy, accessible water rather than a wild one — the kind of place to learn still-water tactics or fish a short evening without committing to a river. A carte de pêche covers it; the rules are the association's own, so check before you go.

  • Fishery
  • Granite
Water quality (WFD)
  • EcologyUnknown
  • ChemicalUnknown
Why this score
  • autumn conditions with overcast skies and breezy wind.
Directions
Seasons & zones
  • Trout 2nd Saturday of March3rd Sunday of September
Related guides
Booking & contacts
Permits & access