Water temperature for Brown Trout
Warm — slow22°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Spring and autumn are the reliable windows; summer afternoons carry glacial melt off the Rieserferner group and the fish go quiet until the light drops.
Where
Pocket water and short riffles through the upper and middle valley — classic granite-boulder structure. The trout hold tight to the breaks.
Method
Upstream nymph through the broken water, dry-dropper where it settles. Single barbless on the managed stretches.
Kit
9 to 10 ft #4, floating line, 12 ft leader to 4-5 lb fluoro. Studded boots — granite cobble is no less slippery than limestone.
Why this works
Water at 22.3°C. This is the line where catch-and-release kills brown trout. Do not fish for them today.
Beyond the hatch · worth watchingambient prey
Hatch predictions
Top prey shown — see all 2 with Pro.
Start free trial14-day free trial. Cancel anytime.
Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Alpine RhithrogenaHatch
2
3
3
2
Sculpin / Baitfish (Rivers)Hatch
2
3
3
3
3
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Brown Trout fly box
12-16 · Pattern
Upstream dry, on top
12-16 · Gammarus Scud
Dead-drift, sub-surface
Permits & access
Permit required — see local rules.
- Marble trout carry a year-round no-take rule (reservoirs excepted); brown trout have a 25cm minimum size and a 1 Dec-second Saturday of Feb closed season; grayling a 33cm minimum and a 1 Jan-31 May closed season
- Individual concession-holders can extend or tighten these rules for their own stretch.
What's coming
Plan ahead
5-day outlook
Cooler water nearby · 1
Probably above the Brown Trout safety line — these are likely cooler, but carry a thermometer.
The full read · show the working · for Brown Trout · confidence 90%
How the 10 is built — score × weight = contribution
Temperature5 × 28%1.4
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time65 × 13%8.5
Pressure80 × 7%5.6
Insect activity45 × 12%5.4
Limiting factor: Water temperature (22.3°C) is outside Brown Trout's preferred range (10–16°C)= 51
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
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
- Trout 2026-02-15 → 2026-11-30
- Grayling 2026-06-01 → 2026-11-30
Rules are set at province or association level — check locally.
- Marble trout 2026-02-15 → 2026-11-30
Related guides
Booking & contacts
Aurino
Water temperature for Brown Trout
Warm — slow22°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Spring and autumn are the reliable windows; summer afternoons carry glacial melt off the Rieserferner group and the fish go quiet until the light drops.
Where
Pocket water and short riffles through the upper and middle valley — classic granite-boulder structure. The trout hold tight to the breaks.
Method
Upstream nymph through the broken water, dry-dropper where it settles. Single barbless on the managed stretches.
Kit
9 to 10 ft #4, floating line, 12 ft leader to 4-5 lb fluoro. Studded boots — granite cobble is no less slippery than limestone.
Why this works
Water at 22.3°C. This is the line where catch-and-release kills brown trout. Do not fish for them today.
Beyond the hatch · worth watchingambient prey
Hatch predictions
Top prey shown — see all 2 with Pro.
Start free trial14-day free trial. Cancel anytime.
Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Alpine RhithrogenaHatch
2
3
3
2
Sculpin / Baitfish (Rivers)Hatch
2
3
3
3
3
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Brown Trout fly box
12-16 · Pattern
Upstream dry, on top
12-16 · Gammarus Scud
Dead-drift, sub-surface
Permits & access
Permit required — see local rules.
- Marble trout carry a year-round no-take rule (reservoirs excepted); brown trout have a 25cm minimum size and a 1 Dec-second Saturday of Feb closed season; grayling a 33cm minimum and a 1 Jan-31 May closed season
- Individual concession-holders can extend or tighten these rules for their own stretch.
What's coming
Plan ahead
5-day outlook
Cooler water nearby · 1
Probably above the Brown Trout safety line — these are likely cooler, but carry a thermometer.
The full read · show the working · for Brown Trout · confidence 90%
How the 10 is built — score × weight = contribution
Temperature5 × 28%1.4
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time65 × 13%8.5
Pressure80 × 7%5.6
Insect activity45 × 12%5.4
Limiting factor: Water temperature (22.3°C) is outside Brown Trout's preferred range (10–16°C)= 51
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
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
- Trout 2026-02-15 → 2026-11-30
- Grayling 2026-06-01 → 2026-11-30
Rules are set at province or association level — check locally.
- Marble trout 2026-02-15 → 2026-11-30
Related guides
Booking & contacts