Freestone · Limestone · Lower Austria

Ybbs

Lower Austrian limestone Alpine river draining northern foothills, good brown trout populations with regular fly hatches.

Likely too hot — check on arrivalThe water is probably above the brown trout safety line — carry a thermometer.

Water estimated at about 22°C from air temperature — there is no water-temp gauge here, so treat the figure as a guide. If the estimate is right, this is above 22°C and you should not be targeting brown trout. But shade, cold tributaries, and recent rain can hold a river two or three degrees below the air-driven figure. Carry a thermometer. Check it on arrival. If the river is genuinely at 22°C or above, fish another species or come back another day. If it is cooler than the estimate: dawn and dusk only, barbless hooks, land it fast, wet hands, no air shots. Stop the moment a fish is slow to recover.

DepthShaded riffles, deep pools, spring inflows, cold tributary mouths. That is where the fish will be.
TimingDawn and dusk only. Nothing in the middle of the day.

Poorlive now

Not the day for it

River temperature is the limiting factor today, not the flow. This is not the day to push it. Check the thermal advice above before you head out.

90% confidence

Notify when prime

What moved it

Flow6.8 m³/sLast reading 19h ago
Water temp22.2°C
ClarityClear

Today’s fly

Pheasant Tail Nymph14-18

Upstream

Live now

Conditions on the water

Live gauge

Trends shown where the gauge supports them

Flow

Steady

6.8 m³/s

Last reading 19h ago

Water temp

22.2°C

coldwarm

Clarity

Clear

Weather

26°C

Overcast

Wind

SW 5 km/h

calmblown out

Pressure

1017 hPa

lowhigh

Rain · recent

0.0 mm

dryspate risk

Rain · ahead

3.7 mm

dryspate risk

Live readings — water temperature is an estimate where the gauge does not record it.

Water temperature for brown trout

Warm — slow

22°C est.ideal 10–16°C

0°14°28°

How to fish it · for brown 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

⛔ Water at 22.2°C. This is the line where catch-and-release kills brown trout. Do not fish for them today.

Hatch timeline · todayQuiet day

Hatch predictions

See the full hour-by-hour hatch timeline with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

See the full sub-surface read with Pro.

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14-day free trial. Cancel anytime.

Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 2 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

Trout season

Grayling season

Grannom

Evening Sedge

Alpine Rhithrogena

Large Dark Olive

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

Ranked for today

Brown Trout fly box

Permits & access

Permit required — see local rules.

Gewässer in Niederösterreich
Fischerkarte + Gewässerkarte erforderlich
Die Ybbs verfügt über bewirtschaftete Abschnitte.

What's coming

Plan ahead

5-day outlook

Cooler water nearby · 1

Probably above the brown trout safety line — these are likely cooler, but carry a thermometer.

Enns47 km
Brown trout · Grayling
~16°C

About this water

Lower Austrian limestone Alpine river draining northern foothills, good brown trout populations with regular fly hatches. Clear water supports excellent nymphing and dry fly. Responsive flows from rainfall, accessible wading. Multiple productive sections between settlements—closer to Vienna than remote Alpine rivers, but high water quality.

Limestone

Water quality (WFD)

Ecology: Good
Chemical: Unknown

WFD classification · ATOK406870000

The full read · show the working · for brown trout · confidence 90%

How the 10 is built — score × weight = contribution

Temperature5 × 28%1.4

Flow80 × 22%17.6

Clarity95 × 18%17.1

Feeding Time75 × 13%9.8

Pressure80 × 7%5.6

Insect activity51 × 12%6.1

Limiting factor: Water temperature (22.2°C) is outside Brown Trout's preferred range (10–16°C)= 58

Can you trust it?

Water temperatureair-to-water estimateestimated

Level / flowon-river gaugeobserved

Prey activitymodelled from regional profilemodelled

What would change the calculation

Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.

Directions

Apple Maps Google Maps

Seasons & zones

Trout1 April → 30 September
Grayling1 June → 28 February
Austrian grayling (Äsche) rules are state and fishery specific. Common pattern: closed 1 January – 31 May (spawning protection); open from June. Individual fishery seasons often end October/November. Always check the local Fischereikarte and specific water permit. Salzburg-area waters commonly show 1 June or 16 May opener.

Related guides

Booking & contacts

Freestone · Limestone · Lower Austria

Ybbs

Terrain map

Lower Austrian limestone Alpine river draining northern foothills, good brown trout populations with regular fly hatches.

Poor · Brown Trout

Pheasant Tail Nymph · 14-18

Likely too hot — check on arrivalThe water is probably above the brown trout safety line — carry a thermometer.

DepthShaded riffles, deep pools, spring inflows, cold tributary mouths. That is where the fish will be.
TimingDawn and dusk only. Nothing in the middle of the day.

Poorlive now

Not the day for it

River temperature is the limiting factor today, not the flow. This is not the day to push it. Check the thermal advice above before you head out.

90% confidence

Notify when prime

What moved it

Flow6.8 m³/sLast reading 19h ago
Water temp22.2°C
ClarityClear

Today’s fly

Pheasant Tail Nymph14-18

Upstream

Conditions on the water

Live gauge

Flow

Steady

6.8 m³/s

Last reading 19h ago

Water temp22.2°C

ClarityClear

Weather26°C

WindSW 5 km/h

Pressure1017 hPa

Rain · recent0.0 mm

Rain · ahead3.7 mm

Live readings — water temperature is an estimate where the gauge does not record it.

Water temperature for brown trout

Warm — slow

22°C est.ideal 10–16°C

0°14°28°

How to fish it · for brown 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

⛔ Water at 22.2°C. This is the line where catch-and-release kills brown trout. Do not fish for them today.

Hatch timeline · todayQuiet day

Hatch predictions

See the full hour-by-hour hatch timeline with Pro.

Start free trial

14-day free trial. Cancel anytime.

Sub-surface · on the nymphunder the surface

Hatch predictions

See the full sub-surface read with Pro.

Start free trial

14-day free trial. Cancel anytime.

Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 2 with Pro.

Start free trial

14-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

Trout season

Grayling season

Grannom

Evening Sedge

Alpine Rhithrogena

Large Dark Olive

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

Ranked for today

Brown Trout fly box

Permits & access

Permit required — see local rules.

Gewässer in Niederösterreich
Fischerkarte + Gewässerkarte erforderlich
Die Ybbs verfügt über bewirtschaftete Abschnitte.

What's coming

Plan ahead

5-day outlook

Cooler water nearby · 1

Probably above the brown trout safety line — these are likely cooler, but carry a thermometer.

Enns

47 km

~16°C

Brown trout · Grayling

About this water

Limestone

Water quality (WFD)

Ecology: Good
Chemical: Unknown

WFD classification · ATOK406870000

The full read · show the working · for brown trout · confidence 90%

How the 10 is built — score × weight = contribution

Temperature5 × 28%1.4

Flow80 × 22%17.6

Clarity95 × 18%17.1

Feeding Time75 × 13%9.8

Pressure80 × 7%5.6

Insect activity51 × 12%6.1

Limiting factor: Water temperature (22.2°C) is outside Brown Trout's preferred range (10–16°C)= 58

Can you trust it?

Water temperatureair-to-water estimateestimated

Level / flowon-river gaugeobserved

Prey activitymodelled from regional profilemodelled

What would change the calculation

Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.

Directions

Apple Maps Google Maps

Seasons & zones

Trout1 April → 30 September
Grayling1 June → 28 February
Austrian grayling (Äsche) rules are state and fishery specific. Common pattern: closed 1 January – 31 May (spawning protection); open from June. Individual fishery seasons often end October/November. Always check the local Fischereikarte and specific water permit. Salzburg-area waters commonly show 1 June or 16 May opener.

Booking & contacts