Freestone · Mixed · Central Bohemia

Vltava 28

Vltava 28 terrain map
Terrain map

One of the best trout fisheries in the country — fly-fishing only, barbless hooks only, with elevated takeable size limits for grayling and brown trout stricter than the national baseline.

Marginal · Brown Trout
Czech Nymph · 10-14
Marginallive now
Slow going — pick your moments
Low and clear — careful approach country. Cover and shadow are doing the work today.
80% confidence
What moved it
  • LevelLight rain recentlyNo gauge reading
  • Water temp18.8°C
  • ClarityClear
Today’s fly
Czech Nymph
Czech Nymph10-14
Euro-nymph
Conditions on the water
Estimate
Level
Light rain recently
No gauge reading
Water temp18.8°C
ClarityClear
Weather19°C
WindN 7 km/h
Pressure1017 hPa
Rain · recent3.6 mm
Rain · ahead22.9 mm

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

Water temperature for brown trout
Warm — slow
19°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 18.8°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots. Otherwise poor — water clarity is in the right range.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 8 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
1
Grayling seasonSeason
1
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
Brown Trout fly box
Permits & access
Permit required — see local rules.
  • State licence (rybářský lístek) + local permit from ČRS branch
  • Fly-only, barbless hooks mandatory
  • Brown trout protected Sep 1–Apr 15
  • Grayling protected Dec 1–Jun 15.
What's coming
Plan ahead
5-day outlook
Water here around 19°C. Nothing cooler within range — carry a thermometer.
About this water

One of the best trout fisheries in the country — fly-fishing only, barbless hooks only, with elevated takeable size limits for grayling and brown trout stricter than the national baseline. Brown trout, rainbow trout and grayling in water where Czech nymphing was developed and perfected. A showcase fishery with beat-specific management that sets the standard for Czech quality-section regulation. WFD ecological status is 'Bad', likely reflecting upstream pressures on the wider Vltava rather than the managed fishery itself — the fly-only beats remain highly productive.

  • Mixed
Water quality (WFD)
  • Ecology: Bad
The full read · show the working · for brown trout · confidence 80%
How the 35 is built — score × weight = contribution
Temperature42 × 28%11.8
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity62 × 12%7.4
Conditions total= 65
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.
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Rainbow trout16 April → 31 August
  • Trout16 April → 31 August
  • Grayling16 June → 30 November
Related guides
Grayling Playbookgrayling tacticsEuro Nymphingsubsurface methods
Booking & contacts