Water temperature for Brown Trout
Warm — slow23°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Spring (April-June) brings the best hatches once the Casentino runoff settles; autumn into the reserve's December closure fishes well too, once the summer crowds thin. Midsummer heat can shut the no-kill water down by midday — mornings and evenings are more reliable.
Where
Broken pocket water and riffled runs through the stretch above Stia; slower glides and pool tails as the river opens out toward Pratovecchio. The no-kill water above the SP310 bridge at Tintoria holds the better fish.
Method
Upstream nymph or dry-dropper through the broken water; switch to a small dry over risers in the calmer glides. Single barbless hook mandatory throughout the reserve, and the upper stretch is release-only regardless of size.
Kit
8.5 to 9 ft #3/4 rod for this scale of water. Floating line, 9-12 ft leader to 5X-6X. Small Perdigóns and Pheasant Tails do the subsurface work; carry CDC duns and a Klinkhåmer for the hatch.
Why this works
Water at 23.2°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
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
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
6-10 · Pattern
Swing, sub-surface
Permits & access
Permit required — see local rules.
- Regional Tuscany fishing licence (licenza di pesca dilettantistica, type B annual or type C fortnightly) required, plus the separate ZRS Capodarno daily permit (max €30, cap 40 anglers/day)
- No-kill zone: single barbless hook, artificial lures only, immediate release
- Controlled-harvest zone allows 3 salmonids/day, minimum 25cm.
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.
Gallery · 1
10-2011. Río Arnoia - Freixo - Cartelle - Galiza AF05
The full read · show the working · for Brown Trout · confidence 90%
How the 2 is built — score × weight = contribution
Temperature1 × 28%0.3
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time65 × 13%8.5
Pressure80 × 7%5.6
Insect activity43 × 12%5.2
Limiting factor: Water temperature (23.2°C) is outside Brown Trout's preferred range (10–16°C)= 54
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 2026-02-22 → 2026-12-31
Related guides
Booking & contacts
Arno (Casentino)
Water temperature for Brown Trout
Warm — slow23°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Spring (April-June) brings the best hatches once the Casentino runoff settles; autumn into the reserve's December closure fishes well too, once the summer crowds thin. Midsummer heat can shut the no-kill water down by midday — mornings and evenings are more reliable.
Where
Broken pocket water and riffled runs through the stretch above Stia; slower glides and pool tails as the river opens out toward Pratovecchio. The no-kill water above the SP310 bridge at Tintoria holds the better fish.
Method
Upstream nymph or dry-dropper through the broken water; switch to a small dry over risers in the calmer glides. Single barbless hook mandatory throughout the reserve, and the upper stretch is release-only regardless of size.
Kit
8.5 to 9 ft #3/4 rod for this scale of water. Floating line, 9-12 ft leader to 5X-6X. Small Perdigóns and Pheasant Tails do the subsurface work; carry CDC duns and a Klinkhåmer for the hatch.
Why this works
Water at 23.2°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
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
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
6-10 · Pattern
Swing, sub-surface
Permits & access
Permit required — see local rules.
- Regional Tuscany fishing licence (licenza di pesca dilettantistica, type B annual or type C fortnightly) required, plus the separate ZRS Capodarno daily permit (max €30, cap 40 anglers/day)
- No-kill zone: single barbless hook, artificial lures only, immediate release
- Controlled-harvest zone allows 3 salmonids/day, minimum 25cm.
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.
Gallery · 1
10-2011. Río Arnoia - Freixo - Cartelle - Galiza AF05
The full read · show the working · for Brown Trout · confidence 90%
How the 2 is built — score × weight = contribution
Temperature1 × 28%0.3
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time65 × 13%8.5
Pressure80 × 7%5.6
Insect activity43 × 12%5.2
Limiting factor: Water temperature (23.2°C) is outside Brown Trout's preferred range (10–16°C)= 54
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 2026-02-22 → 2026-12-31
Related guides
Booking & contacts