Freestone · Granite · Cévennes / Ardèche

Ardèche (Upper, Aubenas Headwaters)

Ardèche (Upper, Aubenas Headwaters) terrain map
Terrain map

Most people know the Ardèche as the river that cut the famous gorge — the cliff-walled circus below Vallon-Pont-d'Arc that shows up on every postcard of southern France.

Marginal · Brown Trout
CDC Emerger · 16-18
Marginallive now
Slow going — pick your moments
Low and clear — careful approach country. Cover and shadow are doing the work today.
80% confidence
What moved it
  • LevelProxyvia Loire (Upper)
  • Water temp18.9°C
  • ClarityClear
Today’s fly
CDC Emerger
CDC Emerger16-18
Dead-drift
Conditions on the water
Proxy gauge
Level
Steady
Proxy
via Loire (Upper)
Water temp18.9°C
ClarityClear
Weather20°C
WindNW 12 km/h
Pressure1020 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

No gauge on this water — conditions are inferred from Loire (Upper). The trend transfers, the absolute level does not.

Water temperature for brown trout
Warm — slow
19°C est.ideal 1016°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 18.9°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots. Otherwise poor — water clarity is in the right range.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 8 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
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Autumn OliveHatch
1
2
1
GrannomHatch
1
1

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 Ardèche
  • Several wild-trout reserves (réserves) on the upper beats — no-kill, fly-only.
What's coming
Plan ahead
5-day outlook
Water here around 19°C. Nothing cooler within range — carry a thermometer.
About this water

Most people know the Ardèche as the river that cut the famous gorge — the cliff-walled circus below Vallon-Pont-d'Arc that shows up on every postcard of southern France. The trout water is higher up, a long way before the river has any business being dramatic. It rises at Mont Mézenc on the high granite of the Ardèche plateau and runs south through Thueyts and the Pont-de-Labeaume basin before reaching Aubenas, where the character starts to shift towards the Mediterranean lower river and the trout start to give up. The productive beats are above Thueyts. Small fish, plenty of them, in clear granite water that responds exactly the way a Cévennes spate river should: quick to rise, quick to drop, honest hatches when the conditions line up. April and May are the best months. The upper Ardèche has been a wild-trout reserve for years in several reaches — check the local AAPPMA rules before you go. Short rod, upstream presentation, nothing fancy. The tourists never come this far north.

  • Granite
Water quality (WFD)
  • EcologyGood
  • ChemicalGood

WFD classification · FRDR421

The full read · show the working · for brown trout · confidence 80%
How the 34 is built — score × weight = contribution
Temperature41 × 28%11.5
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity63 × 12%7.6
Conditions total= 65
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Loire (Upper)proxy
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
Seasons & zones
  • Trout2nd Saturday of March → 3rd Sunday of September
Related guides
Booking & contacts