Mountain Freestone · Schist Metamorphic · Salzburg / Großarltal, AT

Großarler Ache

01 Großarlbach
Today · Not the day for it
Pheasant Tail Nymph (sz 18)
Forecast · Today
Not the day for it
Not much stacked in your favour today. Worth an hour if you are nearby, not worth the special trip.
45% projected
Today's fly
Pheasant Tail Nymph (sz 18)
Pheasant Tail Nymph (sz 18)
Conditions on the water · Today
Live gauge
Level
Rising
0.89 m
Lifting fast
Water temp12.3°C
ClarityUnfishable
Weather15°C
WindN 7 km/h
Pressure1021 hPa
Rain · recent2.5 mm
Rain · ahead15.4 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
12°C est.ideal 4–14°C
0°14°28°
How to fish it · for Grayling
When
Midday window — grayling feed best from late morning into early afternoon.
Where
Work runs and glides — grayling shoal in the bottom third of the water column.
Method
Tight-line nymph the bottom third with weighted patterns.
Kit
10 ft #3 rod, floating line, long leader to 4 lb fluoro for nymphs.
Why this works
Good — water temperature is working for you, but time of day is the limiting factor today. Grayling is active in the cooler margins of the season.
Likely species
Caddisflies
Hatch timeline · todayPeak at 6h

12h(now) — Daddy Long Legs

Stage: On emergersApproach: Emerger or dryActivity: 35%
Also:Autumn Olive28%
4 food groups active

Peak activity at 6h — Daddy Long Legs (Daddy Long Legs, 3 food groups active)

Sub-surface · on the nymphunder the surface

Hatch predictions

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Beyond the hatch · worth watchingambient prey(1)

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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 · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
1
Grayling seasonSeason
1
2
2
1
Evening SedgeHatch
2
3
3
3
2
Alpine RhithrogenaHatch
1
2
2
1
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
2
2
2
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
Beats · 1
Aubrücke to the valley head (incl. Ötzlsee)Access varies
One fly-only water from the Aubrücke upstream through Hüttschlag to the head of the valley, taking in the Ötzlsee.
Visit official site ↗
Permits & access
Permit required — see local rules.
  • Fly rod only — dry fly, wet fly or nymph; single barbless hook; catch-and-release, no fish taken; 1 May – 30 September
  • Tickets for the fly water are sold only by Hotel Almrösl, Hüttschlag
  • The stretch below the Aubrücke is a separate, non-fly water with its own tickets and rules
  • Ötzlsee: shore fishing only, no boats
  • A Salzburg fishing card or guest card is also required.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Salzach
15 km
80
Brown trout · Grayling
Rauriser Ache
16 km
Brown trout · Brook trout
Hüttwinklache
19 km
Brown trout
Seidlwinkelache
25 km
Brown trout
Fuscher Ache
28 km
Brown trout
Gallery · 2
  1. 01 Großarlbach
  2. Terrain map of the venue
    Terrain map
Water quality (WFD)
  • Ecology: Poor
  • Chemical: Failing to achieve good
What this classification means

Matched 2026-09-14 by point query against EEA WISE WFD2022_SurfaceWaterBody (river line 3 m from the venue pin). Status: WISE 2022 (3rd RBMP) ecological class 4 = Poor; chemical 'failing to achieve good' (Austria-wide in the 2022 cycle).

WFD classification · ATOK304680004

The full read · show the working · for Grayling · confidence 55%
How the 78 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time10 × 13%1.3
Pressure80 × 7%5.6
Insect activity40 × 12%4.8
Conditions total= 73
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 1 May → 30 September
  • Grayling 1 June → 30 September

    Grayling in the lower fly water. The fishery runs 1 May – 30 September and every fish goes back, but the Salzburg statutory grayling closed season still applies in spring, so the display opener is set conservatively at 1 June. Austrian grayling (Äsche) rules are state and fishery specific; always check the water permit.

    Season dates are set at state or regional level — confirm the local rules.

Related guides
Grayling Playbookgrayling tacticsAlpine Streamsmountain entomologyEuro Nymphingsubsurface methods
Booking & contacts