Freestone · Limestone · Trentino-Alto Adige

Sarca

Sarca venue image
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Trentino river flowing into Lake Garda with clear limestone water and excellent hatches.

Prime · Brown Trout
Pheasant Tail Nymph · 14-18
Primelive now
About as good as it gets
Low and clear — careful approach country. Take your time — read the water before you cast.
75% confidence
What moved it
  • Level0.24 m
  • Water temp14.0°C
  • ClarityClear
Today’s fly
Pheasant Tail Nymph
Pheasant Tail Nymph14-18
Upstream, sub-surface
Conditions on the water
Live gauge
Level
Steady
0.24 m
Water temp14.0°C
ClarityClear
Weather16°C
WindNW 3 km/h
Pressure1018 hPa
Rain · recent0.0 mm
Rain · ahead14.4 mm

Live readings — water temperature is an estimate where the gauge does not record it.

Water temperature for brown trout
Ideal
14°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; Mayfly late May where it shows. The Sarca is glacial-influenced; flows track meltwater.
Where
Pool tails, the heads of riffles, and the deeper edges of pockets. The middle Sarca through the gorges is classic Alpine pocket water.
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
Excellent — water temperature 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 9 active hatches hour by hour with Pro.

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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
Alpine RhithrogenaHatch
2
3
3
2
Sculpin / Baitfish (Rivers)Hatch
2
3
3
3
3
3
3
3
2
March BrownHatch
2
3
2
Large StoneflyHatch
2
3
2

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
Lake Molveno
8.0 km
Brown trout · Char
Adige Tributaries (Trentino)
19 km
22
Brown trout · Marble trout
Lake Caldonazzo
29 km
Brown trout · Char
Noce
31 km
Brown trout · Marble trout · Grayling
Lake Levico
32 km
Brown trout · Char
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

Trentino river flowing into Lake Garda with clear limestone water and excellent hatches. Marble trout in the main river, brown trout and grayling in tributaries. The water clarity rewards close observation and fine presentation. Euro nymphing and dry-dropper techniques both work well. Permit-driven beats.

  • Limestone
Water quality (WFD)
  • Ecology: Moderate
  • Chemical: Unknown

WFD classification · IT22E100000000100TN

The full read · show the working · for brown trout · confidence 75%
How the 81 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity65 × 12%7.8
Conditions total= 81
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
Apple MapsGoogle Maps
Seasons & zones
  • Trout2026-02-15 → 2026-10-07
  • Graylingvaries_by_water → varies_by_water
  • Marble trout2026-03-01 → 2026-09-30
Related guides
Grayling Playbookgrayling tacticsEuro Nymphingsubsurface methods
Booking & contacts