Freestone · Limestone · Bavaria / Munich

Isar

Isar venue image
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Major Bavarian alpine river from the Karwendel mountains through Munich to the Danube.

Prime · Rainbow Trout
Pheasant Tail Nymph · 14-18
Primelive now
About as good as it gets
Low and clear — careful approach country. Take your time — read the water before you cast.
90% confidence
What moved it
  • LevelModerate rain recentlyNo gauge reading
  • Water temp17.3°C
  • ClarityClear
Today’s fly
Pheasant Tail Nymph
Pheasant Tail Nymph14-18
Upstream
Conditions on the water
Estimate
Level
Moderate rain recently
No gauge reading
Water temp17.3°C
ClarityClear
Weather22°C
WindNE 6 km/h
Pressure1019 hPa
Rain · recent11.5 mm
Rain · ahead22.1 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

Water temperature for rainbow trout
Ideal
17°C est.ideal 10–18°C
0°14°28°
How to fish it · for rainbow trout
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
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 10 active hatches hour by hour with Pro.

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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
2
1
Grayling seasonSeason
1
2
2
2
2
2
2
1
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
1

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

Ranked for today
Rainbow Trout fly box
Permits & access
Permit required — see local rules.
  • Upper Bavarian river
  • Fischereischein + Erlaubnisschein required.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Walchensee
39 km
Brown trout · Lake trout · Char
Isar — guest-angler stretches
39 km
Brown trout · Rainbow trout · Grayling
Upper Ammer
47 km
Brown trout · Grayling
Lech (Bavaria)
50 km
Brown trout · Grayling
Inn (Bavaria)
53 km
Brown trout · Grayling · Hucho
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

Major Bavarian alpine river from the Karwendel mountains through Munich to the Danube. Grayling, brown trout, and rainbow trout in varied water. The upper Isar above Sylvenstein is premier grayling water—clear and productive. Even urban sections hold fish.

  • Limestone
Water quality (WFD)
  • Ecology: Good
  • Chemical: Unknown
What this classification means

WFD ecological status Moderate → Good corrected to EEA WISE 2022 (3rd RBMP) classification for waterbody DERW_DEBY_1_F402 (was a stale earlier-cycle value). Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu), verified 2026-06-18.

WFD classification · DERW_DEBY_1_F402

The full read · show the working · for rainbow trout · confidence 90%
How the 83 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time70 × 13%9.1
Pressure75 × 7%5.3
Insect activity64 × 12%7.7
Conditions total= 83
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout1 March → 30 September
  • Grayling1 May → 31 December
Related guides
Grayling Playbookgrayling tacticsEuro Nymphingsubsurface methods
Booking & contacts