Flows through the Fiemme and Fassa valleys framed by beautiful alpine scenery. Brown trout and marble trout in the water, with some sections regulated by hydro releases. Good dry fly fishing during caddis hatches when the light is right.
- Mixed
Water temperature for brown trout
Warm — slow17°C est.ideal 10–16°C
0°14°28°
How to fish it · for brown trout
When
Through the Italian trout season — afternoon hatches in spring; dawn and dusk in summer warm. Val di Fiemme and Val di Fassa fish high-elevation cold water.
Where
Pool tails, riffle heads, and the seams through the dolomite gorges. The Avisio runs cleaner pocket water than the glacial Sarca and Noce.
Method
Upstream nymph through the broken water; dry to risers in the glides. Italian No-Kill stretches mandate single barbless — comply or fish elsewhere.
Kit
9 to 10 ft #4 for medium freestone with Alpine clarity. Floating line, 12 ft leader to 4 to 5 lb fluoro. Studded boots — Alpine cobble runs slick.
Why this works
Good — water clarity is working for you, but time of day is the limiting factor today.
Hatch timeline · todayQuiet day
Hatch predictions
Today's headline hatch shown — see all 12 active hatches hour by hour with Pro.
Start free trial14-day free trial. Cancel anytime.
Evidence
ModelledModerate confidence
Modelled from regional ecology — no survey or occurrence data for this water yet.
Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Alpine RhithrogenaHatch
1
2
2
1
Large Dark OliveHatch
1
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Brown Trout fly box
Permits & access
Permit required — see local rules.
- Italian fishing license (permesso di pesca) varies by provincia (province)
- Barbless hooks often required on protected waters
- Catch limits may apply.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
About this water
Water quality (WFD)
- Ecology: Good
- Chemical: Unknown
WFD classification · ITARW02AD07200060TN
The full read · show the working · for brown trout · confidence 75%
How the 74 is built — score × weight = contribution
Temperature77 × 28%21.6
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity59 × 12%7.1
Conditions total= 74
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
- Trout2026-02-15 → 2026-10-07
- Marble trout2026-03-01 → 2026-09-30
Related guides
Booking & contacts
Avisio
Terrain map
Flows through the Fiemme and Fassa valleys framed by beautiful alpine scenery.
Water temperature for brown trout
Warm — slow17°C est.ideal 10–16°C
0°14°28°
How to fish it · for brown trout
When
Through the Italian trout season — afternoon hatches in spring; dawn and dusk in summer warm. Val di Fiemme and Val di Fassa fish high-elevation cold water.
Where
Pool tails, riffle heads, and the seams through the dolomite gorges. The Avisio runs cleaner pocket water than the glacial Sarca and Noce.
Method
Upstream nymph through the broken water; dry to risers in the glides. Italian No-Kill stretches mandate single barbless — comply or fish elsewhere.
Kit
9 to 10 ft #4 for medium freestone with Alpine clarity. Floating line, 12 ft leader to 4 to 5 lb fluoro. Studded boots — Alpine cobble runs slick.
Why this works
Good — water clarity is working for you, but time of day is the limiting factor today.
Hatch timeline · todayQuiet day
Hatch predictions
Today's headline hatch shown — see all 12 active hatches hour by hour with Pro.
Start free trial14-day free trial. Cancel anytime.
Evidence
ModelledModerate confidence
Modelled from regional ecology — no survey or occurrence data for this water yet.
Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Alpine RhithrogenaHatch
1
2
2
1
Large Dark OliveHatch
1
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Brown Trout fly box
Permits & access
Permit required — see local rules.
- Italian fishing license (permesso di pesca) varies by provincia (province)
- Barbless hooks often required on protected waters
- Catch limits may apply.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
About this water
Flows through the Fiemme and Fassa valleys framed by beautiful alpine scenery. Brown trout and marble trout in the water, with some sections regulated by hydro releases. Good dry fly fishing during caddis hatches when the light is right.
- Mixed
Water quality (WFD)
- Ecology: Good
- Chemical: Unknown
WFD classification · ITARW02AD07200060TN
The full read · show the working · for brown trout · confidence 75%
How the 74 is built — score × weight = contribution
Temperature77 × 28%21.6
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity59 × 12%7.1
Conditions total= 74
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
- Trout2026-02-15 → 2026-10-07
- Marble trout2026-03-01 → 2026-09-30
Related guides
Booking & contacts