Rules at a glance
- Licence required
- Fly only
Water temperature for Grayling
Ideal9°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 — conditions well-balanced, with water temperature particularly in your favour.
Likely species
Mayflies
Caddisflies
Caddisflies- Large sedgesMost likelyNearest relative#8–10 · AdultBig waked sedge in the last light and after dark.
- Green SedgeAlso possibleLower confidenceNearest relative#10–12–14–16 · NymphFree-living green caddis larva; fast stony riffles.
- Welshman's ButtonAlso possibleLower confidence#12–14 · Egg-layingSkitter it at dusk — this one's fished, not dead-drifted.
Damselflies & dragonflies
Damselflies & dragonflies
Gammarids
Hatch timeline · tomorrowPeak at 13 Uhr
12 Uhr(now) — Autumn Olive
Stage: On emergersApproach: Emerger or dryActivity: 64%
Also:Autumn Needle Fly52%Black Midge48%
Peak emergence windowWeather boost10 food groups active
Peak activity at 13 Uhr — Iron Blue (Iron Blue, Weather boost)
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Supporters see what else is on the menu.
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
Fly box · Grayling
Hook 14–18 · Fly
in season · matches water height
Permits & access
Permit required — see local rules.
- Fischereischein sowie Gastangler-Erlaubnis/Tageskarte erforderlich
- Methoden- und Fangbegrenzungsregeln variieren je nach Abschnitt – vor dem Angeln beim Rechteinhaber/Guide erfragen.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
München - Isar Terrain map
The full read · show the working · for Grayling · confidence 90%
How the 85 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time85 × 13%11.1
Pressure80 × 7%5.6
Insect activity66 × 12%7.9
Conditions total= 86
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
Directions
Seasons & zones
- Trout local Bavaria/fishery calendar → local Bavaria/fishery calendar
- Grayling local fishery calendar plus Bavaria law → local fishery calendar plus Bavaria law
Bavaria grayling rules (closed 1 Jan – 30 Apr, min 35 cm) plus stricter guest-stretch conditions where applied.
Season dates are set at state or regional level — confirm the local rules.
Related guides
Booking & contacts
Isar — guest-angler stretches
Water temperature for Grayling
Ideal9°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 — conditions well-balanced, with water temperature particularly in your favour.
Likely species
Caddisflies
- Large sedgesMost likelyNearest relative#8–10 · AdultBig waked sedge in the last light and after dark.
- Green SedgeAlso possibleLower confidenceNearest relative#10–12–14–16 · NymphFree-living green caddis larva; fast stony riffles.
- Welshman's ButtonAlso possibleLower confidence#12–14 · Egg-layingSkitter it at dusk — this one's fished, not dead-drifted.
Damselflies & dragonflies
Hatch timeline · tomorrowPeak at 13 Uhr
12 Uhr(now) — Autumn Olive
Stage: On emergersApproach: Emerger or dryActivity: 64%
Also:Autumn Needle Fly52%Black Midge48%
Peak emergence windowWeather boost10 food groups active
Peak activity at 13 Uhr — Iron Blue (Iron Blue, Weather boost)
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Supporters see what else is on the menu.
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
Fly box · Grayling
Hook 14–18 · Fly
in season · matches water height
Permits & access
Permit required — see local rules.
- Fischereischein sowie Gastangler-Erlaubnis/Tageskarte erforderlich
- Methoden- und Fangbegrenzungsregeln variieren je nach Abschnitt – vor dem Angeln beim Rechteinhaber/Guide erfragen.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
München - Isar Terrain map
The full read · show the working · for Grayling · confidence 90%
How the 85 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time85 × 13%11.1
Pressure80 × 7%5.6
Insect activity66 × 12%7.9
Conditions total= 86
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
Directions
Seasons & zones
- Trout local Bavaria/fishery calendar → local Bavaria/fishery calendar
- Grayling local fishery calendar plus Bavaria law → local fishery calendar plus Bavaria law
Bavaria grayling rules (closed 1 Jan – 30 Apr, min 35 cm) plus stricter guest-stretch conditions where applied.
Season dates are set at state or regional level — confirm the local rules.
Related guides
Booking & contacts