- Ecology: Good
- Chemical: Unknown
WFD classification · ITARW03BB14000010TN
Rules at a glance
- Licence required
How to fish it · for Trout
When
April–June and September–October
Where
With limited drift, anchor or fish static from sheltered positions. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point. In the calm, a single dry fly or a slowly-fished nymph tends to out-fish an active retrieve.
The plan
Plan A
With limited drift, anchor or fish static from sheltered positions. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point. In the calm, a single dry fly or a slowly-fished nymph tends to out-fish an active retrieve.
Plan B
If the main plan is not working, switch to a smaller, more imitative pattern fished slower and deeper. A change of drift angle can also make a difference.
Watch for
Evening tends to be the best period in summer — stay late if you can for a sedge or spinner fall.
Either bank or boat
Calm evenings can fish well from bank or boat — target rising fish wherever you find them.
Sub-surface · on the nymphunder the surface
Hatch predictions
See the full sub-surface read with Pro.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey
Hatch predictions
Top prey shown — see all 5 with Pro.
Start free trial14-day free trial. Cancel anytime.
Through the year
0–3 scale · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Mayfly (Green Drake)Hatch
2
2
Daddy Long LegsHatch
2
3
2
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Silverhorns & LonghornsHatch
2
3
3
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Trout fly box
12-16 · Pattern
Upstream dry, on top
6-10 · Pattern
Swing, sub-surface
Permits & access
Permit required — see local rules.
- Trentino lake permit via pescatrentino.it
- Barbless hooks often required.
What's coming
Plan ahead
5-day outlook
Condition match
52%
Cloud25%
Wind65%
Temp60%
A reasonable day here, though cloud isn't quite in the sweet spot.
Fishing better nearby · 5
Gallery · 2
Lake Caldonazzo, Valsugana Terrain map
Water quality (WFD)
Why this score
- Daddy longlegs are in their seasonal window, boosting the chance of targeted feeding.
Directions
Seasons & zones
- Trout 2026-04-01 → 2026-10-31
- Char 2026-04-01 → 2026-10-31
Related guides
Booking & contacts
Lake Caldonazzo
How to fish it · for Trout
When
April–June and September–October
Where
With limited drift, anchor or fish static from sheltered positions. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point. In the calm, a single dry fly or a slowly-fished nymph tends to out-fish an active retrieve.
The plan
Plan A
With limited drift, anchor or fish static from sheltered positions. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point. In the calm, a single dry fly or a slowly-fished nymph tends to out-fish an active retrieve.
Plan B
If the main plan is not working, switch to a smaller, more imitative pattern fished slower and deeper. A change of drift angle can also make a difference.
Watch for
Evening tends to be the best period in summer — stay late if you can for a sedge or spinner fall.
Either bank or boat
Calm evenings can fish well from bank or boat — target rising fish wherever you find them.
Sub-surface · on the nymphunder the surface
Hatch predictions
See the full sub-surface read with Pro.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey
Hatch predictions
Top prey shown — see all 5 with Pro.
Start free trial14-day free trial. Cancel anytime.
Through the year
0–3 scale · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Mayfly (Green Drake)Hatch
2
2
Daddy Long LegsHatch
2
3
2
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Silverhorns & LonghornsHatch
2
3
3
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Trout fly box
12-16 · Pattern
Upstream dry, on top
6-10 · Pattern
Swing, sub-surface
Permits & access
Permit required — see local rules.
- Trentino lake permit via pescatrentino.it
- Barbless hooks often required.
What's coming
Plan ahead
5-day outlook
Condition match
52%
Cloud25%
Wind65%
Temp60%
A reasonable day here, though cloud isn't quite in the sweet spot.
Fishing better nearby · 5
Gallery · 2
Lake Caldonazzo, Valsugana Terrain map
Water quality (WFD)
- Ecology: Good
- Chemical: Unknown
WFD classification · ITARW03BB14000010TN
Why this score
- Daddy longlegs are in their seasonal window, boosting the chance of targeted feeding.
Directions
Seasons & zones
- Trout 2026-04-01 → 2026-10-31
- Char 2026-04-01 → 2026-10-31
Related guides
Booking & contacts