Mountain Freestone · Schist Metamorphic · Salzburg / Großarltal, AT

Großarler Ache

01 Großarlbach
Today · About as good as it gets
Black Midge
Forecast · Today
About as good as it gets
On the feed top to bottom — start on the rises with a dry, drop a nymph if they stay down.
55% projected
Today's fly
Black Midge
Black Midge
Conditions on the water · Today
Live gauge
Level
Steady
0.89 m
Last reading 12h ago
Water temp7.9°C
ClarityClear
Weather9°C
WindN 6 km/h
Pressure1027 hPa
Rain · recent0.0 mm
Rain · ahead0.0 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
8°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
Mayflies
Caddisflies
Stoneflies
Hatch timeline · todayPeak at 10 Uhr

12 Uhr(now) — Black Midge

Stage: On emergersApproach: Emerger or dryActivity: 78%
Also:Autumn Needle Fly46%Autumn Olive40%
Peak emergence window6 food groups active

Peak activity at 10 Uhr — Black Midge (Black Midge, Peak emergence window)

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.
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Permits & access
Permit required — see local rules.
  • Nur mit der Fliegenrute – Trockenfliege, Nassfliege oder Nymphe; Einzelhaken ohne Widerhaken; Catch & Release, keine Entnahme; 1
  • Mai – 30
  • September
  • Karten für die Fliegenstrecke gibt es ausschließlich im Hotel Almrösl in Hüttschlag
  • Die Strecke unterhalb der Aubrücke ist ein eigenes Revier ohne Fliegenvorschrift, mit eigenen Karten und Regeln
  • Ötzlsee: nur vom Ufer, keine Boote
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