Stoneflies
Gammarids
Eifel fly-fishing river around Gerolstein and the upper Kyll. A practical western Germany trout and grayling venue, usually accessed through local accommodation, clubs or day permits rather than open public wandering.
- Eifel limestone volcanic
Rules at a glance
- Licence required
- Fly only
Water temperature for Grayling
Ideal5°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
Excellent — water temperature is working for you, but insect activity is the limiting factor today. Grayling feeds actively in cold water — peak winter sport.
Likely species
Hatch timeline · todayQuiet day
Hatch predictions
Today's headline hatch shown — see all 3 active hatches hour by hour as a supporter.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 2 guilds as a supporter.
Start free trial14-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 · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
2
2
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
Southern Germany only. Trout and grayling in Bavarian meadow streams, alpine creeks and famous upper-river systems.
Hook 14–18 · Fly
in season · matches water height
Permits & access
Permit required — see local rules.
- Fischereischein plus local Erlaubnisschein required
- Beat-specific rules are important on the Kyll.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
Sankt Thomas Brücke mit Nepomuk Terrain map
About this water
The full read · show the working · for Grayling · confidence 75%
How the 91 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity37 × 12%4.4
Conditions total= 76
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
Seasons & zones
- Trout local permit calendar → local permit calendar
- Grayling local permit calendar → local permit calendar
Grayling rules are state and fishery specific. Verify local Kyll permits before targeting grayling.
Season dates are set at state or regional level — confirm the local rules.
Related guides
Booking & contacts
Kyll (Gerolstein / Upper Kyll)
Eifel fly-fishing river around Gerolstein and the upper Kyll.
Water temperature for Grayling
Ideal5°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
Excellent — water temperature is working for you, but insect activity is the limiting factor today. Grayling feeds actively in cold water — peak winter sport.
Likely species
Hatch timeline · todayQuiet day
Hatch predictions
Today's headline hatch shown — see all 3 active hatches hour by hour as a supporter.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 2 guilds as a supporter.
Start free trial14-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 · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
2
2
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
Southern Germany only. Trout and grayling in Bavarian meadow streams, alpine creeks and famous upper-river systems.
Hook 14–18 · Fly
in season · matches water height
Permits & access
Permit required — see local rules.
- Fischereischein plus local Erlaubnisschein required
- Beat-specific rules are important on the Kyll.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
Sankt Thomas Brücke mit Nepomuk Terrain map
About this water
Eifel fly-fishing river around Gerolstein and the upper Kyll. A practical western Germany trout and grayling venue, usually accessed through local accommodation, clubs or day permits rather than open public wandering.
- Eifel limestone volcanic
The full read · show the working · for Grayling · confidence 75%
How the 91 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity37 × 12%4.4
Conditions total= 76
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
Seasons & zones
- Trout local permit calendar → local permit calendar
- Grayling local permit calendar → local permit calendar
Grayling rules are state and fishery specific. Verify local Kyll permits before targeting grayling.
Season dates are set at state or regional level — confirm the local rules.
Related guides
Booking & contacts