Freestone · Limestone · Veneto / Belluno

Piave

Poor · Marble Trout
Blue-Winged Olive · 18-20
Poorlive now
Not the day for it
Low and clear — careful approach country. A morning for the obvious fish only.
90% confidence
What moved it
  • LevelDry recentlyNo gauge reading
  • Water temp22.5°C
  • ClarityClear
Today's fly
Blue-Winged Olive
Blue-Winged Olive18-20
Upstream dry, on top
Conditions on the water
Estimate
Level
Dry recently
No gauge reading
Water temp22.5°C
ClarityClear
Weather29°C
WindS 8 km/h
Pressure1023 hPa
Rain · recent0.0 mm
Rain · ahead1.3 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

Water temperature for Marble Trout
Warm — slow
23°C est.ideal 8–13°C
0°14°28°
How to fish it · for Marble Trout
When
First and last light bring marbles up to feed — the rest of the day they hold deep. Fishable 7 March to 28 September, but every marble trout goes back regardless of the calendar — retention is prohibited outright, not just seasonally.
Where
Deep glides and undercut limestone banks through the gorge sections toward Longarone. Marbles favour bigger, slower water than the brown trout sharing the same reach.
Method
Streamer on intermediate or sink-tip, worked slowly through the deep holding water. Barbless single hook mandatory, release with the fish still in the net.
Kit
9 to 10 ft #6/7, intermediate or fast-sink line, 8 to 10 lb fluoro. Big baitfish streamers. Wet net for handling.
Why this works
Water at 22.5°C. This is the line where catch-and-release kills marble trout. Do not fish for them today.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 2 active hatches hour by hour with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 2 with Pro.

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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
Marble Trout fly box
Permits & access
Permit required — see local rules.
  • Veneto Regolamento Regionale 1/2023 art
  • 29: trout and marble trout open 7 March-28 September 2026 (min
  • 22cm fario); grayling open 16 April-28 September (min
  • Marble trout retention is prohibited year-round under art
  • 11 comma 2, regardless of season
  • Daily/multi-day permit holders cannot retain grayling on the Busche-to-province-end reach at all
What's coming
Plan ahead
5-day outlook
Water here around 23°C. Nothing cooler within range — carry a thermometer.
The full read · show the working · for Marble Trout · confidence 90%
How the 10 is built — score × weight = contribution
Temperature7 × 28%2.0
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time65 × 13%8.5
Pressure80 × 7%5.6
Insect activity52 × 12%6.2
Limiting factor: Water temperature (22.5°C) is outside Marble Trout's preferred range (8–13°C)= 53
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
What would change the calculation
Cooler water — back toward the 8–13 °C ideal band — would lift the score and ease welfare.
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 2026-03-07 → 2026-09-28
  • Grayling 2026-04-16 → 2026-09-28

    Temolo (grayling) closed from the last Monday of September to 15 April (R.R. 1/2023 art. 29) — later opener than trout. Minimum size 30cm. On the reach from the Busche dam to the end of the province, capture and retention is banned outright for anyone fishing on a daily or multi-day permit, regardless of season — check which permit type covers your beat before assuming grayling are fair game.

    Rules are set at province or association level — check locally.

  • Marble trout 2026-03-07 → 2026-09-28
Related guides
Grayling Playbookgrayling tacticsEuro Nymphingsubsurface methods
Booking & contacts