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

VigiEau lists this venue's surface-water zone (Littoral, dépt 56) at crise, under an official préfectoral drought arrêté. Fishing is not itself banned by it, but water levels are low — go gently on stressed fish.

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Temporary notices from official orders and recent fishery reports — they clear automatically once out of date.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)
Useful ripple, fishable wave. Worth a session if the wind holds.
59% confidence

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

What moved it
  • WindSW 15 km/hGentle breeze · Gusts to 21 km/h
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 · Gusts to 21 km/h
SW 15 km/h
N
SW
from the south-west
Wave20 cm ripple
Water temp13.1°C
Air temp13°C
CloudOvercast
Pressure1016 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. 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 Buzzers (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

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 3 guilds as a supporter.

Start free trial

14-day free trial. Cancel anytime.

Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 4 as a supporter.

Start free trial

14-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
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
59%
Cloud50%
Wind65%
Temp60%

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

Other water nearby · 3
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)
  • Ecology: Unknown
  • Chemical: Unknown
Why this score
  • autumn conditions with overcast skies and breezy wind.
Directions
Seasons & zones
  • Trout 2nd Saturday of March → 3rd Sunday of September
Related guides
Booking & contacts
Permits & access