Gammarids
- Ecology: Moderate
- Chemical: Unknown
WFD classification · FRGR0245
Rules at a glance
- Day tickets
- Fly only
Water temperature for Brown Trout
Ideal14°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Through the open trout season — opens 2nd Saturday of March; spring olives and grannom; sedges through summer; small dark flies into autumn close.
Where
The lower and middle Allier through the Auvergne. Pool tails, riffle heads, and the seams behind boulders.
Method
Upstream dry to risers; dry-dropper through the riffles. The Allier's clear volcanic water reads every line wrinkle — long leader, fine tippet, careful approach.
Kit
9 ft #4 — French freestone default. Floating line, 12 ft leader to 4 to 5 lb fluoro. Studded boots.
Likely species
Hatch timeline · tomorrowPeak at 18 Uhr
12 Uhr(now) — Daddy Long Legs
Stage: On emergersApproach: Emerger or dryActivity: 27%
Also:Cinnamon Sedge26%Autumn Dun23%
Weather boost8 food groups active
Peak activity at 18 Uhr — Caperer (Caperer, Weather boost)
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Supporters see what else is on the menu.
Start free trial14-day free trial. Cancel anytime.
Evidence
Survey-backed · regionalHigh confidence
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
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
Grayling seasonSeason
1
2
2
2
1
Freshwater ShrimpHatch
2
3
3
3
3
3
3
3
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Autumn OliveHatch
1
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Fly box · Brown Trout
Permits & access
Permit required — see local rules.
- AAPPMA permits.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
The River Allier at Coudes, Puy-de-Dôme, Auvergne Terrain map
Water quality (WFD)
The full read · show the working · for Brown Trout · confidence 90%
How the 0 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time85 × 13%11.1
Pressure80 × 7%5.6
Insect activity66 × 12%7.9
Conditions total= 87
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
Directions
Seasons & zones
- Trout 2. Saturday im March → 3. Sunday im September
- Grayling 3. Saturday im May → 3. Sunday im September
France national rule: grayling opens 3rd Saturday of May in all waters. In 1st category (salmonid) rivers, grayling closes with the trout season on the 3rd Sunday of September. Departmental regulations may impose additional restrictions. Always check the relevant département's 2026 arrêté préfectoral.
Salmon: Banned (2026) — Salmon fishing prohibited across the Loire basin (long-term ban).
Sea trout: Banned (2026) — Loire basin migratory species ban.
Related guides
Booking & contacts
Allier
Water temperature for Brown Trout
Ideal14°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Through the open trout season — opens 2nd Saturday of March; spring olives and grannom; sedges through summer; small dark flies into autumn close.
Where
The lower and middle Allier through the Auvergne. Pool tails, riffle heads, and the seams behind boulders.
Method
Upstream dry to risers; dry-dropper through the riffles. The Allier's clear volcanic water reads every line wrinkle — long leader, fine tippet, careful approach.
Kit
9 ft #4 — French freestone default. Floating line, 12 ft leader to 4 to 5 lb fluoro. Studded boots.
Likely species
Hatch timeline · tomorrowPeak at 18 Uhr
12 Uhr(now) — Daddy Long Legs
Stage: On emergersApproach: Emerger or dryActivity: 27%
Also:Cinnamon Sedge26%Autumn Dun23%
Weather boost8 food groups active
Peak activity at 18 Uhr — Caperer (Caperer, Weather boost)
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Supporters see what else is on the menu.
Start free trial14-day free trial. Cancel anytime.
Evidence
Survey-backed · regionalHigh confidence
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
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
Grayling seasonSeason
1
2
2
2
1
Freshwater ShrimpHatch
2
3
3
3
3
3
3
3
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Autumn OliveHatch
1
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Fly box · Brown Trout
Permits & access
Permit required — see local rules.
- AAPPMA permits.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
The River Allier at Coudes, Puy-de-Dôme, Auvergne Terrain map
Water quality (WFD)
- Ecology: Moderate
- Chemical: Unknown
WFD classification · FRGR0245
The full read · show the working · for Brown Trout · confidence 90%
How the 0 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time85 × 13%11.1
Pressure80 × 7%5.6
Insect activity66 × 12%7.9
Conditions total= 87
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
Directions
Seasons & zones
- Trout 2. Saturday im March → 3. Sunday im September
- Grayling 3. Saturday im May → 3. Sunday im September
France national rule: grayling opens 3rd Saturday of May in all waters. In 1st category (salmonid) rivers, grayling closes with the trout season on the 3rd Sunday of September. Departmental regulations may impose additional restrictions. Always check the relevant département's 2026 arrêté préfectoral.
Salmon: Banned (2026) — Salmon fishing prohibited across the Loire basin (long-term ban).
Sea trout: Banned (2026) — Loire basin migratory species ban.
Related guides
Booking & contacts