Freestone · Granite · Graubünden / Engadin, CH

Inn (Engadin)

Gravel-bar reach of the Inn river with Alpine peaks in the background, Engadin

The Inn in the Engadin valley is one of Switzerland's finest trout rivers—clear, cold water with brown trout and grayling responding to Euro nymphing and dry-dropper work.

Today · About as good as it gets
Black Midge
Forecast · Today
About as good as it gets
On the feed top to bottom — start on the rises with a dry, drop a nymph if they stay down.
55% projected
Today's fly
Black Midge
Black Midge
Conditions on the water · Today
Live gauge
Level
Steady
1041.00 m
Water temp7.4°C
ClarityClear
Weather8°C
WindN 13 km/h
Pressure1025 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

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

Water temperature for Grayling
Ideal
7°C est.ideal 4–14°C
0°14°28°
How to fish it · for Grayling
When
Midday window — grayling feed best from late morning into early afternoon.
Where
Work runs and glides — grayling shoal in the bottom third of the water column.
Method
Tight-line nymph the bottom third with weighted patterns.
Kit
10 ft #3 rod, floating line, long leader to 4 lb fluoro for nymphs.
Why this works
Good — water temperature is working for you, but time of day is the limiting factor today. Grayling is active in the cooler margins of the season.
Likely species
Stoneflies
Hatch timeline · todayPeak at 10am

12pm(now) — Black Midge

Stage: On emergersApproach: Emerger or dryActivity: 75%
Also:Autumn Needle Fly45%
Peak emergence window3 food groups active

Peak activity at 10am — Black Midge (Black Midge, Peak emergence window)

Sub-surface · on the nymphunder the surface

Hatch predictions

Supporters see the full sub-surface read.

Start free trial

14-day free trial. Cancel anytime.

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
Trout seasonSeason
1
2
2
2
1
Alpine RhithrogenaHatch
2
3
3
2
Sculpin / Baitfish (Rivers)Hatch
2
3
3
3
3
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1

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

Ranked for today
Grayling fly box

A compact but high-quality Swiss box covering alpine streams, mountain lakes, and Jura salmonid rivers such as the Doubs.

Small Perdigón
Small Perdigón
Hook 14–18 · Fly
in season · matches water height
Permits & access
Permit required — see local rules.
  • Graubünden Canton
  • Cantonal patent and the relevant local permission required
  • Check current Engadin rules rather than assuming one generic Graubünden river regime.
What's coming
Plan ahead
5-day outlook
Other water nearby · 3
Engadine Mountain Lakes
15 km
Brown trout · Char
Adda (Valtellina)
38 km
74
Brown trout · Marble trout · Grayling
Oglio (Val Camonica)
51 km
Brown trout · Marble trout · Grayling
Gallery · 2
  1. Gravel-bar reach of the Inn river with Alpine peaks in the background, Engadin
    The Inn river in the Engadin, Switzerland
  2. Terrain map of the venue
    Terrain map
About this water

The Inn in the Engadin valley is one of Switzerland's finest trout rivers—clear, cold water with brown trout and grayling responding to Euro nymphing and dry-dropper work. The upper Engadin around St. Moritz and Zuoz is premium, the sort of alpine water that teaches you precision.

  • Granite
The full read · show the working · for Grayling · confidence 55%
How the 76 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time15 × 13%2.0
Pressure80 × 7%5.6
Insect activity20 × 12%2.4
Conditions total= 71
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 1 May → 15 September
Related guides
Grayling Playbookgrayling tacticsAlpine Streamsmountain entomologyEuro Nymphingsubsurface methods
Booking & contacts