Spate · Granite · Brittany / South Finistère

Aven

Aven venue image
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Small, fast South Brittany river flowing from Scaër to Pont-Aven.

Good · Brown Trout
CDC Emerger · 16-18
Goodlive now
A proper day on the water
Low and clear — careful approach country. Stay small, stay accurate.
75% confidence
What moved it
  • Level0.16 m
  • Water temp16.9°C
  • ClarityClear
Today’s fly
CDC Emerger
CDC Emerger16-18
Dead-drift
Conditions on the water
Live gauge
Level
Steady
0.16 m
Water temp16.9°C
ClarityClear
Weather15°C
WindNW 13 km/h
Pressure1026 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

Live readings — water temperature is an estimate where the gauge does not record it.

Water temperature for brown trout
Warm — slow
17°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
Good — water clarity is right today, though time of day could be better.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 7 active hatches hour by hour with Pro.

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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
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
Other water nearby · 5
Scorff
9.0 km
Brown trout · Salmon · Sea trout
Isole
15 km
79
Brown trout · Salmon · Sea trout
Jet
22 km
85
Brown trout · Salmon · Sea trout
Ellé
27 km
Brown trout · Salmon · Sea trout
Odet
31 km
Brown trout · Salmon · Sea trout
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

Small, fast South Brittany river flowing from Scaër to Pont-Aven. Intimate water — 100% wild brown trout on Armorican granite. Fly-fishing on designated beats. Responsive to Atlantic rainfall for volume. Spring through early summer best for dry-fly work. This is not showpiece water, but it rewards careful fishing and respect for wild trout. Check AAPPMA for access.

  • Granite
Water quality (WFD)
  • Ecology: Good
  • Chemical: Unknown

WFD classification · FRGR0087

The full read · show the working · for brown trout · confidence 75%
How the 75 is built — score × weight = contribution
Temperature79 × 28%22.1
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity54 × 12%6.5
Conditions total= 75
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout2nd Saturday of March → 3rd Sunday of September

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

Related guides
Pyrenees PlaybookFrench riversEuro Nymphingsubsurface methods
Booking & contacts