Limestone · Baden-Württemberg / Bavaria

Upper Danube (Obere Donau)

Upper Danube (Obere Donau) terrain map
Terrain map

The young Danube flows through the Swabian Jura limestone gorge—excellent grayling and brown trout in clear, alkaline water.

Fair · Grayling
F-Fly · Hook 18–22
A side-water session, not the main event
River lifting fast on the rain. Take your time — read the water before you cast.
45% confidence
limited data
What moved it
  • LevelDry recentlyNo gauge reading
  • Water temp14.7°C
  • ClarityVery coloured
Today’s fly
F-Fly
F-FlyHook 18–22
in season · matches water height
Conditions on the water
Estimate
Level
Dry recently
No gauge reading
Water temp14.7°C
ClarityVery coloured
Weather16°C
WindNW 12 km/h
Pressure1019 hPa
Rain · recent0.0 mm
Rain · ahead3.8 mm

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

Water temperature for grayling
Warm — slow
15°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
Fair — barometric pressure is working for you, but time of day is the limiting factor today.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 2 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
Grayling fly box
Permits & access
Permit required — see local rules.
  • Upper Danube source
  • Fischereischein + Erlaubnisschein required.
What's coming
Plan ahead
5-day outlook
Other water nearby · 3
Wutach
48 km
Brown trout · Grayling
Nagold
55 km
Brown trout · Rainbow trout · Grayling
Gutach
59 km
Brown trout
About this water

The young Danube flows through the Swabian Jura limestone gorge—excellent grayling and brown trout in clear, alkaline water. The gorge section between Tuttlingen and Sigmaringen is genuinely spectacular. Dry fly and nymphing on classic European limestone water—one of southern Germany's finest grayling rivers.

  • Limestone
Water quality (WFD)
  • Ecology: Moderate
  • Chemical: Unknown

WFD classification · DERW_DEBW_6-02

The full read · show the working · for grayling · confidence 45%
How the 53 is built — score × weight = contribution
Temperature78 × 28%21.8
Flow55 × 22%12.1
Clarity45 × 18%8.1
Feeding Time10 × 13%1.3
Pressure80 × 7%5.6
Insect activity35 × 12%4.2
Conditions total= 53
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout1 March → 30 September
  • Grayling1 May → 31 December
Related guides
Grayling Playbookgrayling tacticsEuro Nymphingsubsurface methods
Booking & contacts