Spate · Granite · Brittany / Finistère (Quimper)

Odet

Photo of Odet
Contributor photo

Odet — image via Wikipedia (Odet)

Mandrillon <Public domain>, via Wikimedia Commons

Brittany river near Quimper on granitic Armorican bedrock.

Poor · Brown Trout
CDC Emerger · 16-18
Poorlive now
Not the day for it
River temperature is the limiting factor today, not the flow. This is not the day to push it. Check the thermal advice above before you head out.
80% confidence
What moved it
  • LevelDry recentlyNo gauge reading
  • Water temp21.3°C
  • ClarityClear
Today’s fly
CDC Emerger
CDC Emerger16-18
Dead-drift
Conditions on the water
Estimate
Level
Dry recently
No gauge reading
Water temp21.3°C
ClarityClear
Weather21°C
WindNE 11 km/h
Pressure1018 hPa
Rain · recent1.2 mm
Rain · ahead22.1 mm

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

Water temperature for brown trout
Warm — slow
21°C est.ideal 10–16°C
0°14°28°
How to fish it · for brown trout
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
Why this works
⚠️ Water at 21.3°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots. Otherwise very poor — water clarity is in the right range.
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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Evidence
Survey-backed · regionalModerate confidence

Backed by regional invertebrate surveys; no sampling on this exact reach yet.

Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Salmon runRun
1
2
2
2
2
2
1
Trout seasonSeason
1
2
2
2
2
2
1
March BrownHatch
2
3
2
GrannomHatch
2
2
Large StoneflyHatch
2
3
2
Yellow SallyHatch
2
3
2

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Brown Trout fly box
Permits & access
Permit required — see local rules.
  • AAPPMA permits.
What's coming
Plan ahead
5-day outlook
Water here around 21°C. Nothing cooler within range — carry a thermometer.
Gallery · 2
  1. Photo of Odet
    Odet — image via Wikipedia (Odet)
  2. Terrain map of the venue
    Terrain map
About this water

Brittany river near Quimper on granitic Armorican bedrock. Wild trout water with fly-fishing opportunity on accessible beats. Spring through early autumn fishing. Spate character means good flow after Atlantic rainfall. Some sections may be private; check AAPPMA for public access and regulations.

  • Granite
Water quality (WFD)
  • Ecology: Good
  • Chemical: Failing to achieve good
What this classification means

WFD re-coded 2026-06-18: prior id FRGR0083 actually identifies the Jet — this river was mis-tagged to a neighbouring water body. Re-mapped to FRGR0078. Status: EEA WISE 2022 (3rd RBMP). Confidence: high — single Odet water body. Source: discodata.eea.europa.eu.

WFD classification · FRGR0078

The full read · show the working · for brown trout · confidence 80%
How the 19 is built — score × weight = contribution
Temperature11 × 28%3.1
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity43 × 12%5.2
Limiting factor: Water temperature (21.3°C) is outside Brown Trout's preferred range (10–16°C)= 50
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Salmon1 March → 15 September
  • Trout2nd Saturday of March → 3rd Sunday of September

Salmon: Banned (2026) — Brittany 2026 order bans Atlantic salmon and sea trout on all Breton rivers.

Sea trout: Banned (2026) — Brittany 2026 order bans Atlantic salmon and sea trout on all Breton rivers.

Related guides
Pyrenees PlaybookFrench riversEuro Nymphingsubsurface methods
Booking & contacts