Freestone · Granite · Lozère / Haute-Loire, FR

Allier (Upper, Langogne–Langeac)

FR-48-Allier Valley2
Poor · Grayling
Pink Grayling Bug · Hook 16
New ruleReported 12 Sept 2026

Severe drought restrictions (crise) in force

VigiEau lists this venue's surface-water zone (bassin de l'Allier amont, dépt 48) 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°38072 ↗

Temporary notices from official orders and recent fishery reports — they clear automatically once out of date. Always confirm locally before travelling.

Closed season
Out of season. Try elsewhere.
Closed — confidence not applicable today.
What moved it
  • Flow4.3 m³/sDropping in the last 6h
  • Water temp9.8°C
  • ClarityClear
Today's fly
Pink Grayling Bug
Pink Grayling BugHook 16
in season · matches water height · all-rounder
Conditions on the water
Live gauge
Flow
Steady
4.3 m³/s
Dropping in the last 6h
Water temp9.8°C
ClarityClear
Weather9°C
WindNW 6 km/h
Pressure1025 hPa
Rain · recent0.0 mm
Rain · ahead0.6 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Grayling
Ideal
10°C est.ideal 4–14°C
0°14°28°
How to fish it · for Grayling
When
Autumn into late autumn — September through November prime. The upper Allier's grayling water above Vichy is some of the best in central France.
Where
Faster gravel runs and the heads of riffles through the Auvergne headwaters. Deeper glide tails as autumn cold pushes fish deeper.
Method
Euro-nymphing through the deeper pockets is the daily default. Switch to dries on autumn afternoons when sedges and olives come off.
Kit
10 ft #3 nymphing rod for the deep pockets; 9 ft #4 for dries. 4 to 5 lb fluoro tippet, 12 ft leader.
Likely species
Mayflies
Stoneflies
Caddisflies
Gammarids
Hatch timeline · todayPeak at 10:00

Hatch predictions

Today's headline hatch shown — see all 9 active hatches hour by hour as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

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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 · Grayling
Small Perdigón
Small Perdigón
Hook 14–18 · Fly
in season · matches water height
Permits & access
Permit required — see local rules.
  • AAPPMA Haute-Loire
  • Fly-only parcours in several reaches — verify locally.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Lac de Naussac
4.0 km
Brown trout · Rainbow trout · Pike
Loire (Upper)
24 km
Brown trout · Grayling
Chassezac
33 km
Brown trout
Ardèche (Upper, Aubenas Headwaters)
35 km
Brown trout
Beaume
38 km
Brown trout
Gallery · 2
  1. FR-48-Allier Valley2
  2. Terrain map of the venue
    Terrain map
Water quality (WFD)
  • Ecology: Good
  • Chemical: Failing to achieve good
What this classification means

WFD chemical status Good → Failing to achieve good corrected to EEA WISE 2022 (3rd RBMP) classification for waterbody FRGR0141A (was a stale earlier-cycle value). Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu), verified 2026-06-18.

WFD classification · FRGR0141A

The full read · show the working · for Grayling · confidence 75%
How the 0 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time25 × 13%3.3
Pressure80 × 7%5.6
Insect activity42 × 12%5.0
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
  • Trout 2.º Saturday de March → 3.º Sunday de September
  • Grayling 3.º Saturday de May → 3.º Sunday de 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.

Related guides
Grayling Playbookgrayling tacticsPyrenees PlaybookFrench riversEuro Nymphingsubsurface methods
Booking & contacts