Central Swiss river flowing into Lake Lucerne, limestone-clear water with brown trout. Technical fishing in water so clear the fish know you're there. Strong caddis and olive hatches.
- Limestone
Water temperature for grayling
Ideal10.8°Cideal 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
Excellent — water temperature is right today, though insect activity could be better.
Hatch timeline · todayQuiet day
Hatch predictions
Today's headline hatch shown — see all 3 active hatches hour by hour with Pro.
Start free trial14-day free trial. Cancel anytime.
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
Trout seasonSeason
1
2
2
2
2
1
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Alpine RhithrogenaHatch
1
2
2
1
Large Dark OliveHatch
1
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Grayling fly box
Permits & access
Permit required — see local rules.
- Central Swiss river under cantonal rules; check the exact Schwyz and any adjoining-water requirements before fishing rather than relying on a generic central-Switzerland note.
What's coming
Plan ahead
5-day outlook
Other water nearby · 1
Gallery · 1
Terrain map
About this water
The full read · show the working · for grayling · confidence 90%
How the 82 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity70 × 18%12.6
Feeding Time90 × 13%11.7
Pressure80 × 7%5.6
Insect activity51 × 12%6.1
Conditions total= 82
Can you trust it?
Water temperaturelive gauge readinggauge
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
Directions
Seasons & zones
- Trout1 April → 15 September
Related guides
Booking & contacts
Muota
Google Places
Central Swiss river flowing into Lake Lucerne, limestone-clear water with brown trout.
Water temperature for grayling
Ideal10.8°Cideal 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
Excellent — water temperature is right today, though insect activity could be better.
Hatch timeline · todayQuiet day
Hatch predictions
Today's headline hatch shown — see all 3 active hatches hour by hour with Pro.
Start free trial14-day free trial. Cancel anytime.
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
Trout seasonSeason
1
2
2
2
2
1
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Alpine RhithrogenaHatch
1
2
2
1
Large Dark OliveHatch
1
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Grayling fly box
Permits & access
Permit required — see local rules.
- Central Swiss river under cantonal rules; check the exact Schwyz and any adjoining-water requirements before fishing rather than relying on a generic central-Switzerland note.
What's coming
Plan ahead
5-day outlook
Other water nearby · 1
Gallery · 1
Terrain map
About this water
Central Swiss river flowing into Lake Lucerne, limestone-clear water with brown trout. Technical fishing in water so clear the fish know you're there. Strong caddis and olive hatches.
- Limestone
The full read · show the working · for grayling · confidence 90%
How the 82 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity70 × 18%12.6
Feeding Time90 × 13%11.7
Pressure80 × 7%5.6
Insect activity51 × 12%6.1
Conditions total= 82
Can you trust it?
Water temperaturelive gauge readinggauge
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
Directions
Seasons & zones
- Trout1 April → 15 September
Related guides
Booking & contacts