Freestone · Granite · Piedmont / Vercelli, IT

Sesia

River Sesia in Borgosesia, Piemonte, Italia

Piedmont river draining Monte Rosa through fast, boulder-strewn water.

Marginal · Brown Trout
Hare's Ear Nymph · 12-16
Marginallive now
Slow going — pick your moments
River steady at a fishable height. Slow going — pick your moments and do not force it.
55% confidence
What moved it
  • Level0.54 mDropping in the last 6h
  • Water temp14.0°C
  • ClarityClear
Today's fly
Hare's Ear Nymph
Hare's Ear Nymph12-16
Upstream, sub-surface
Conditions on the water
Live gauge
Level
Steady
0.54 m
lowspate
Water temp14.0°C
ClarityClear
Weather20°C
WindSE 7 km/h
Pressure1025 hPa
Rain · recent0.0 mm
Rain · ahead0.2 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

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. The Sesia is glacial-influenced from Monte Rosa.
Where
Pool tails and the deeper edges of pockets. The middle Sesia through the Valsesia is classic Italian 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
Poor — water temperature is working for you, but river flow is the limiting factor today.
Likely species
Mayflies
Stoneflies
Caddisflies
Gammarids
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 7 active hatches hour by hour as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 2 as a supporter.

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Evidence
Survey-backed · regionalHigh confidence

Backed by regional invertebrate surveys; no sampling on this exact reach yet.

Through the year
0–3 scale · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Freshwater ShrimpHatch
2
3
3
3
3
3
3
3
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Autumn OliveHatch
1
2
1

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Brown Trout fly box

A fuller Italian trout and grayling box for the southern Alps and northern limestone/alpine systems. It keeps the marble-trout streamer accent, but adds proper grayling dries and bugs, competition nymphs, caddis/olive work, terrestrials, pocket-water dries and alpine lake patterns.

SO
Small Olive / BWO Emerger
18-22 · Pattern
Upstream dry, in the film
Permits & access
Permit required — see local rules.
  • Permesso di pesca varies by provincia
  • Always check local regulations.
What's coming
Plan ahead
5-day outlook
Other water nearby · 3
Lys
31 km
Rainbow trout
Ayasse
47 km
Rainbow trout
Dora Baltea (No-Kill, Chambave-Verrayes)
59 km
Brown trout · Marble trout · Grayling
Gallery · 2
  1. River Sesia in Borgosesia, Piemonte, Italia
  2. Terrain map of the venue
    Terrain map
About this water

Piedmont river draining Monte Rosa through fast, boulder-strewn water. Brown trout in the upper reaches, marble trout in the lower section. Strong stonefly and caddis hatches feed the fish. Popular with competition anglers who respect the technical challenge.

  • Granite
Water quality (WFD)
  • Ecology: Good
  • Chemical: Unknown

WFD classification · IT0101SS3N721PI

The full read · show the working · for Brown Trout · confidence 55%
How the 30 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow15 × 22%3.3
Clarity95 × 18%17.1
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity42 × 12%5.0
Limiting factor: River is stable — Brown Trout prefers medium flow= 68
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
A drop and clear would lift the flow and clarity scores.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 2026-03-01 → 2026-09-30
  • Marble trout 2026-03-01 → 2026-09-30
Related guides
Euro Nymphingsubsurface methods
Booking & contacts